[REGRESSION] [BISECTED] MT7925 wireless speed drops to zero since kernel 6.14.3 - wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Hi,
Since kernel v6.14.3, when using wireless to connect to my home router on my laptop, my wireless connection slows down to unusable speeds.
More specifically, since kernel 6.14.3, when connecting to the wireless networks of my OpenWRT Router on my Lenovo IdeaPad Slim 15 16AKP10 laptop, either a 2.4ghz or a 5ghz network, the connection speed drops down to 0.1-0.2 Mbps download and 0 Mbps upload when measured using speedtest-cli. My laptop uses an mt7925 chip according to the loaded driver and firmware.
Detailed Description:
As mentioned above, my wireless connection becomes unusable when using linux 6.14.3 and above, dropping speeds to almost 0 Mbps, even when standing next to my router. Further, pinging archlinux.org results in "Temporary failure in name resolution". Any other wireless device in my house can successfully connect to my router and properly use the internet with good speeds, eg. iphones, ipads, raspberry pi and a windows laptop. When using my Lenovo laptop on a kernel 6.14.3 or higher to connect to other access points, such as my iPhone's hotspot and some TPLink and Zyxel routers - the connection speed is good, and there are no issues, which makes me believe there's something going on with my OpenWRT configuration in conjunction with a commit introduced on kernel 6.14.3 for the mt7925e module as detailed below.
I have followed a related issue previously reported on the mailing list regarding a problem with the same wifi chip on kernel 6.14.3, but the merged fix doesn't seem to fix my problem: https://lore.kernel.org/linux-mediatek/EmWnO5b-acRH1TXbGnkx41eJw654vmCR-8_xM...
I've tested stable builds of 6.15 as well up to 6.15.9 in the last month, which also do not fix the problem. I've also built and bisected v6.14 on june using guides on the Arch Linux wiki, for the following bad commit, same as the previously mentioned reported issue:
[80007d3f92fd018d0a052a706400e976b36e3c87] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Testing further this week, I cloned mainline after 6.16 was released, built and tested it, and the issue still persists. I reverted the following commits on mainline and retested, to successfully see good wireless speeds:
[0aa8496adda570c2005410a30df963a16643a3dc] wifi: mt76: mt7925: fix missing hdr_trans_tlv command for broadcast wtbl [cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Then, reverting *only* 0aa8496adda570c2005410a30df963a16643a3dc causes the issue to reproduce, which confirms the issue is caused by commit cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1 on mainline.
I've attached the following files to a bugzilla ticket:
- lspci -nnk output: https://bugzilla.kernel.org/attachment.cgi?id=308466
- dmesg output: https://bugzilla.kernel.org/attachment.cgi?id=308465
- .config for the built mainline kernel: https://bugzilla.kernel.org/attachment.cgi?id=308467
More information:
OS Distribution: Arch Linux
Linux build information from /proc/version: Linux version 6.16.0linux-mainline-11853-g21be711c0235 (tal@arch-debug) (gcc (GCC) 15.1.1 20250729, GNU ld (GNU Binutils) 2.45.0) #3 SMP PREEMPT_DYNAMIC
OpenWRT Version on my Router: 24.10.2
Laptop Hardware: - Lenovo IdeaPad Slim 15 16AKP10 laptop (x86_64 Ryzen AI 350 CPU) - Network device as reported by lscpi: 14c3:7925 - Network modules and driver in use: mt7925e - mediatek chip firmware as of dmesg: HW/SW Version: 0x8a108a10, Build Time: 20250526152947a WM Firmware Version: ____000000, Build Time: 20250526153043
Referencing regzbot:
#regzbot introduced: 80007d3f92fd018d0a052a706400e976b36e3c87
Please let me know if any other information is needed, or if there is anything else that I can test on my end.
Thanks, Tal Inbar
typo, laptop model is: Lenovo IdeaPad Slim 5 16AKP10
On Fri, Aug 8, 2025 at 4:14 PM Tal Inbar inbartdev@gmail.com wrote:
Hi,
Since kernel v6.14.3, when using wireless to connect to my home router on my laptop, my wireless connection slows down to unusable speeds.
More specifically, since kernel 6.14.3, when connecting to the wireless networks of my OpenWRT Router on my Lenovo IdeaPad Slim 15 16AKP10 laptop, either a 2.4ghz or a 5ghz network, the connection speed drops down to 0.1-0.2 Mbps download and 0 Mbps upload when measured using speedtest-cli. My laptop uses an mt7925 chip according to the loaded driver and firmware.
Detailed Description:
As mentioned above, my wireless connection becomes unusable when using linux 6.14.3 and above, dropping speeds to almost 0 Mbps, even when standing next to my router. Further, pinging archlinux.org results in "Temporary failure in name resolution". Any other wireless device in my house can successfully connect to my router and properly use the internet with good speeds, eg. iphones, ipads, raspberry pi and a windows laptop. When using my Lenovo laptop on a kernel 6.14.3 or higher to connect to other access points, such as my iPhone's hotspot and some TPLink and Zyxel routers - the connection speed is good, and there are no issues, which makes me believe there's something going on with my OpenWRT configuration in conjunction with a commit introduced on kernel 6.14.3 for the mt7925e module as detailed below.
I have followed a related issue previously reported on the mailing list regarding a problem with the same wifi chip on kernel 6.14.3, but the merged fix doesn't seem to fix my problem: https://lore.kernel.org/linux-mediatek/EmWnO5b-acRH1TXbGnkx41eJw654vmCR-8_xM...
I've tested stable builds of 6.15 as well up to 6.15.9 in the last month, which also do not fix the problem. I've also built and bisected v6.14 on june using guides on the Arch Linux wiki, for the following bad commit, same as the previously mentioned reported issue:
[80007d3f92fd018d0a052a706400e976b36e3c87] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Testing further this week, I cloned mainline after 6.16 was released, built and tested it, and the issue still persists. I reverted the following commits on mainline and retested, to successfully see good wireless speeds:
[0aa8496adda570c2005410a30df963a16643a3dc] wifi: mt76: mt7925: fix missing hdr_trans_tlv command for broadcast wtbl [cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Then, reverting *only* 0aa8496adda570c2005410a30df963a16643a3dc causes the issue to reproduce, which confirms the issue is caused by commit cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1 on mainline.
I've attached the following files to a bugzilla ticket:
- lspci -nnk output:
https://bugzilla.kernel.org/attachment.cgi?id=308466
- dmesg output:
https://bugzilla.kernel.org/attachment.cgi?id=308465
- .config for the built mainline kernel:
https://bugzilla.kernel.org/attachment.cgi?id=308467
More information:
OS Distribution: Arch Linux
Linux build information from /proc/version: Linux version 6.16.0linux-mainline-11853-g21be711c0235 (tal@arch-debug) (gcc (GCC) 15.1.1 20250729, GNU ld (GNU Binutils) 2.45.0) #3 SMP PREEMPT_DYNAMIC
OpenWRT Version on my Router: 24.10.2
Laptop Hardware:
- Lenovo IdeaPad Slim 15 16AKP10 laptop (x86_64 Ryzen AI 350 CPU)
- Network device as reported by lscpi: 14c3:7925
- Network modules and driver in use: mt7925e
- mediatek chip firmware as of dmesg: HW/SW Version: 0x8a108a10, Build Time: 20250526152947a WM Firmware Version: ____000000, Build Time: 20250526153043
Referencing regzbot:
#regzbot introduced: 80007d3f92fd018d0a052a706400e976b36e3c87
Please let me know if any other information is needed, or if there is anything else that I can test on my end.
Thanks, Tal Inbar
On Fri, 2025-08-08 at 17:37 +0300, Tal Inbar wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content.
typo, laptop model is: Lenovo IdeaPad Slim 5 16AKP10
On Fri, Aug 8, 2025 at 4:14 PM Tal Inbar inbartdev@gmail.com wrote:
Hi,
Since kernel v6.14.3, when using wireless to connect to my home router on my laptop, my wireless connection slows down to unusable speeds.
More specifically, since kernel 6.14.3, when connecting to the wireless networks of my OpenWRT Router on my Lenovo IdeaPad Slim 15 16AKP10 laptop, either a 2.4ghz or a 5ghz network, the connection speed drops down to 0.1-0.2 Mbps download and 0 Mbps upload when measured using speedtest-cli. My laptop uses an mt7925 chip according to the loaded driver and firmware.
Detailed Description:
As mentioned above, my wireless connection becomes unusable when using linux 6.14.3 and above, dropping speeds to almost 0 Mbps, even when standing next to my router. Further, pinging archlinux.org results in "Temporary failure in name resolution". Any other wireless device in my house can successfully connect to my router and properly use the internet with good speeds, eg. iphones, ipads, raspberry pi and a windows laptop. When using my Lenovo laptop on a kernel 6.14.3 or higher to connect to other access points, such as my iPhone's hotspot and some TPLink and Zyxel routers - the connection speed is good, and there are no issues, which makes me believe there's something going on with my OpenWRT configuration in conjunction with a commit introduced on kernel 6.14.3 for the mt7925e module as detailed below.
I have followed a related issue previously reported on the mailing list regarding a problem with the same wifi chip on kernel 6.14.3, but the merged fix doesn't seem to fix my problem: https://lore.kernel.org/linux-mediatek/EmWnO5b-acRH1TXbGnkx41eJw654vmCR-8_xM...
I've tested stable builds of 6.15 as well up to 6.15.9 in the last month, which also do not fix the problem. I've also built and bisected v6.14 on june using guides on the Arch Linux wiki, for the following bad commit, same as the previously mentioned reported issue:
[80007d3f92fd018d0a052a706400e976b36e3c87] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Testing further this week, I cloned mainline after 6.16 was released, built and tested it, and the issue still persists. I reverted the following commits on mainline and retested, to successfully see good wireless speeds:
[0aa8496adda570c2005410a30df963a16643a3dc] wifi: mt76: mt7925: fix missing hdr_trans_tlv command for broadcast wtbl [cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Then, reverting *only* 0aa8496adda570c2005410a30df963a16643a3dc causes the issue to reproduce, which confirms the issue is caused by commit cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1 on mainline.
I've attached the following files to a bugzilla ticket:
- lspci -nnk output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- dmesg output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- .config for the built mainline kernel:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
More information:
OS Distribution: Arch Linux
Linux build information from /proc/version: Linux version 6.16.0linux-mainline-11853-g21be711c0235 (tal@arch-debug) (gcc (GCC) 15.1.1 20250729, GNU ld (GNU Binutils) 2.45.0) #3 SMP PREEMPT_DYNAMIC
OpenWRT Version on my Router: 24.10.2
Laptop Hardware:
- Lenovo IdeaPad Slim 15 16AKP10 laptop (x86_64 Ryzen AI 350 CPU)
- Network device as reported by lscpi: 14c3:7925
- Network modules and driver in use: mt7925e
- mediatek chip firmware as of dmesg:
HW/SW Version: 0x8a108a10, Build Time: 20250526152947a WM Firmware Version: ____000000, Build Time: 20250526153043
Referencing regzbot:
#regzbot introduced: 80007d3f92fd018d0a052a706400e976b36e3c87
Please let me know if any other information is needed, or if there is anything else that I can test on my end.
Thanks, Tal Inbar
Hi,
Can you capture a sniffer log? There should be some configuration differences that we can identify from the packet frames during the connection process. So please provide the sniffer logs when connecting to your OpenWRT, TPLink, and Zyxel.
Or you can check for any configuration differences between OpenWRT and the other routers, which might also help with debugging.
Thanks~
Yen.
Hi Mingyen,
I'll see what I can gather and I'll let you know.
Tal
On Mon, Aug 11, 2025 at 4:47 AM Mingyen Hsieh (謝明諺) Mingyen.Hsieh@mediatek.com wrote:
On Fri, 2025-08-08 at 17:37 +0300, Tal Inbar wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content.
typo, laptop model is: Lenovo IdeaPad Slim 5 16AKP10
On Fri, Aug 8, 2025 at 4:14 PM Tal Inbar inbartdev@gmail.com wrote:
Hi,
Since kernel v6.14.3, when using wireless to connect to my home router on my laptop, my wireless connection slows down to unusable speeds.
More specifically, since kernel 6.14.3, when connecting to the wireless networks of my OpenWRT Router on my Lenovo IdeaPad Slim 15 16AKP10 laptop, either a 2.4ghz or a 5ghz network, the connection speed drops down to 0.1-0.2 Mbps download and 0 Mbps upload when measured using speedtest-cli. My laptop uses an mt7925 chip according to the loaded driver and firmware.
Detailed Description:
As mentioned above, my wireless connection becomes unusable when using linux 6.14.3 and above, dropping speeds to almost 0 Mbps, even when standing next to my router. Further, pinging archlinux.org results in "Temporary failure in name resolution". Any other wireless device in my house can successfully connect to my router and properly use the internet with good speeds, eg. iphones, ipads, raspberry pi and a windows laptop. When using my Lenovo laptop on a kernel 6.14.3 or higher to connect to other access points, such as my iPhone's hotspot and some TPLink and Zyxel routers - the connection speed is good, and there are no issues, which makes me believe there's something going on with my OpenWRT configuration in conjunction with a commit introduced on kernel 6.14.3 for the mt7925e module as detailed below.
I have followed a related issue previously reported on the mailing list regarding a problem with the same wifi chip on kernel 6.14.3, but the merged fix doesn't seem to fix my problem: https://lore.kernel.org/linux-mediatek/EmWnO5b-acRH1TXbGnkx41eJw654vmCR-8_xM...
I've tested stable builds of 6.15 as well up to 6.15.9 in the last month, which also do not fix the problem. I've also built and bisected v6.14 on june using guides on the Arch Linux wiki, for the following bad commit, same as the previously mentioned reported issue:
[80007d3f92fd018d0a052a706400e976b36e3c87] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Testing further this week, I cloned mainline after 6.16 was released, built and tested it, and the issue still persists. I reverted the following commits on mainline and retested, to successfully see good wireless speeds:
[0aa8496adda570c2005410a30df963a16643a3dc] wifi: mt76: mt7925: fix missing hdr_trans_tlv command for broadcast wtbl [cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Then, reverting *only* 0aa8496adda570c2005410a30df963a16643a3dc causes the issue to reproduce, which confirms the issue is caused by commit cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1 on mainline.
I've attached the following files to a bugzilla ticket:
- lspci -nnk output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- dmesg output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- .config for the built mainline kernel:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
More information:
OS Distribution: Arch Linux
Linux build information from /proc/version: Linux version 6.16.0linux-mainline-11853-g21be711c0235 (tal@arch-debug) (gcc (GCC) 15.1.1 20250729, GNU ld (GNU Binutils) 2.45.0) #3 SMP PREEMPT_DYNAMIC
OpenWRT Version on my Router: 24.10.2
Laptop Hardware:
- Lenovo IdeaPad Slim 15 16AKP10 laptop (x86_64 Ryzen AI 350 CPU)
- Network device as reported by lscpi: 14c3:7925
- Network modules and driver in use: mt7925e
- mediatek chip firmware as of dmesg: HW/SW Version: 0x8a108a10, Build Time: 20250526152947a WM Firmware Version: ____000000, Build Time: 20250526153043
Referencing regzbot:
#regzbot introduced: 80007d3f92fd018d0a052a706400e976b36e3c87
Please let me know if any other information is needed, or if there is anything else that I can test on my end.
Thanks, Tal Inbar
Hi,
Can you capture a sniffer log? There should be some configuration differences that we can identify from the packet frames during the connection process. So please provide the sniffer logs when connecting to your OpenWRT, TPLink, and Zyxel.
Or you can check for any configuration differences between OpenWRT and the other routers, which might also help with debugging.
Thanks~
Yen.
*********** MEDIATEK Confidentiality Notice
The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you!
Hi Mingyen,
I've collected some of my Routers' configuration information which I'll share with you in a private email message.
Tal
On Mon, Aug 11, 2025 at 12:08 PM Tal Inbar inbartdev@gmail.com wrote:
Hi Mingyen,
I'll see what I can gather and I'll let you know.
Tal
On Mon, Aug 11, 2025 at 4:47 AM Mingyen Hsieh (謝明諺) Mingyen.Hsieh@mediatek.com wrote:
On Fri, 2025-08-08 at 17:37 +0300, Tal Inbar wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content.
typo, laptop model is: Lenovo IdeaPad Slim 5 16AKP10
On Fri, Aug 8, 2025 at 4:14 PM Tal Inbar inbartdev@gmail.com wrote:
Hi,
Since kernel v6.14.3, when using wireless to connect to my home router on my laptop, my wireless connection slows down to unusable speeds.
More specifically, since kernel 6.14.3, when connecting to the wireless networks of my OpenWRT Router on my Lenovo IdeaPad Slim 15 16AKP10 laptop, either a 2.4ghz or a 5ghz network, the connection speed drops down to 0.1-0.2 Mbps download and 0 Mbps upload when measured using speedtest-cli. My laptop uses an mt7925 chip according to the loaded driver and firmware.
Detailed Description:
As mentioned above, my wireless connection becomes unusable when using linux 6.14.3 and above, dropping speeds to almost 0 Mbps, even when standing next to my router. Further, pinging archlinux.org results in "Temporary failure in name resolution". Any other wireless device in my house can successfully connect to my router and properly use the internet with good speeds, eg. iphones, ipads, raspberry pi and a windows laptop. When using my Lenovo laptop on a kernel 6.14.3 or higher to connect to other access points, such as my iPhone's hotspot and some TPLink and Zyxel routers - the connection speed is good, and there are no issues, which makes me believe there's something going on with my OpenWRT configuration in conjunction with a commit introduced on kernel 6.14.3 for the mt7925e module as detailed below.
I have followed a related issue previously reported on the mailing list regarding a problem with the same wifi chip on kernel 6.14.3, but the merged fix doesn't seem to fix my problem: https://lore.kernel.org/linux-mediatek/EmWnO5b-acRH1TXbGnkx41eJw654vmCR-8_xM...
I've tested stable builds of 6.15 as well up to 6.15.9 in the last month, which also do not fix the problem. I've also built and bisected v6.14 on june using guides on the Arch Linux wiki, for the following bad commit, same as the previously mentioned reported issue:
[80007d3f92fd018d0a052a706400e976b36e3c87] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Testing further this week, I cloned mainline after 6.16 was released, built and tested it, and the issue still persists. I reverted the following commits on mainline and retested, to successfully see good wireless speeds:
[0aa8496adda570c2005410a30df963a16643a3dc] wifi: mt76: mt7925: fix missing hdr_trans_tlv command for broadcast wtbl [cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Then, reverting *only* 0aa8496adda570c2005410a30df963a16643a3dc causes the issue to reproduce, which confirms the issue is caused by commit cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1 on mainline.
I've attached the following files to a bugzilla ticket:
- lspci -nnk output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- dmesg output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- .config for the built mainline kernel:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
More information:
OS Distribution: Arch Linux
Linux build information from /proc/version: Linux version 6.16.0linux-mainline-11853-g21be711c0235 (tal@arch-debug) (gcc (GCC) 15.1.1 20250729, GNU ld (GNU Binutils) 2.45.0) #3 SMP PREEMPT_DYNAMIC
OpenWRT Version on my Router: 24.10.2
Laptop Hardware:
- Lenovo IdeaPad Slim 15 16AKP10 laptop (x86_64 Ryzen AI 350 CPU)
- Network device as reported by lscpi: 14c3:7925
- Network modules and driver in use: mt7925e
- mediatek chip firmware as of dmesg: HW/SW Version: 0x8a108a10, Build Time: 20250526152947a WM Firmware Version: ____000000, Build Time: 20250526153043
Referencing regzbot:
#regzbot introduced: 80007d3f92fd018d0a052a706400e976b36e3c87
Please let me know if any other information is needed, or if there is anything else that I can test on my end.
Thanks, Tal Inbar
Hi,
Can you capture a sniffer log? There should be some configuration differences that we can identify from the packet frames during the connection process. So please provide the sniffer logs when connecting to your OpenWRT, TPLink, and Zyxel.
Or you can check for any configuration differences between OpenWRT and the other routers, which might also help with debugging.
Thanks~
Yen.
*********** MEDIATEK Confidentiality Notice
The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you!
On Thu, 2025-08-14 at 14:55 +0300, Tal Inbar wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content.
Hi Mingyen,
I've collected some of my Routers' configuration information which I'll share with you in a private email message.
Tal
On Mon, Aug 11, 2025 at 12:08 PM Tal Inbar inbartdev@gmail.com wrote:
Hi Mingyen,
I'll see what I can gather and I'll let you know.
Tal
On Mon, Aug 11, 2025 at 4:47 AM Mingyen Hsieh (謝明諺) Mingyen.Hsieh@mediatek.com wrote:
On Fri, 2025-08-08 at 17:37 +0300, Tal Inbar wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content.
typo, laptop model is: Lenovo IdeaPad Slim 5 16AKP10
On Fri, Aug 8, 2025 at 4:14 PM Tal Inbar inbartdev@gmail.com wrote:
Hi,
Since kernel v6.14.3, when using wireless to connect to my home router on my laptop, my wireless connection slows down to unusable speeds.
More specifically, since kernel 6.14.3, when connecting to the wireless networks of my OpenWRT Router on my Lenovo IdeaPad Slim 15 16AKP10 laptop, either a 2.4ghz or a 5ghz network, the connection speed drops down to 0.1-0.2 Mbps download and 0 Mbps upload when measured using speedtest-cli. My laptop uses an mt7925 chip according to the loaded driver and firmware.
Detailed Description:
As mentioned above, my wireless connection becomes unusable when using linux 6.14.3 and above, dropping speeds to almost 0 Mbps, even when standing next to my router. Further, pinging archlinux.org results in "Temporary failure in name resolution". Any other wireless device in my house can successfully connect to my router and properly use the internet with good speeds, eg. iphones, ipads, raspberry pi and a windows laptop. When using my Lenovo laptop on a kernel 6.14.3 or higher to connect to other access points, such as my iPhone's hotspot and some TPLink and Zyxel routers - the connection speed is good, and there are no issues, which makes me believe there's something going on with my OpenWRT configuration in conjunction with a commit introduced on kernel 6.14.3 for the mt7925e module as detailed below.
I have followed a related issue previously reported on the mailing list regarding a problem with the same wifi chip on kernel 6.14.3, but the merged fix doesn't seem to fix my problem: https://lore.kernel.org/linux-mediatek/EmWnO5b-acRH1TXbGnkx41eJw654vmCR-8_xM...
I've tested stable builds of 6.15 as well up to 6.15.9 in the last month, which also do not fix the problem. I've also built and bisected v6.14 on june using guides on the Arch Linux wiki, for the following bad commit, same as the previously mentioned reported issue:
[80007d3f92fd018d0a052a706400e976b36e3c87] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Testing further this week, I cloned mainline after 6.16 was released, built and tested it, and the issue still persists. I reverted the following commits on mainline and retested, to successfully see good wireless speeds:
[0aa8496adda570c2005410a30df963a16643a3dc] wifi: mt76: mt7925: fix missing hdr_trans_tlv command for broadcast wtbl [cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Then, reverting *only* 0aa8496adda570c2005410a30df963a16643a3dc causes the issue to reproduce, which confirms the issue is caused by commit cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1 on mainline.
I've attached the following files to a bugzilla ticket:
- lspci -nnk output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- dmesg output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- .config for the built mainline kernel:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
More information:
OS Distribution: Arch Linux
Linux build information from /proc/version: Linux version 6.16.0linux-mainline-11853-g21be711c0235 (tal@arch-debug) (gcc (GCC) 15.1.1 20250729, GNU ld (GNU Binutils) 2.45.0) #3 SMP PREEMPT_DYNAMIC
OpenWRT Version on my Router: 24.10.2
Laptop Hardware:
- Lenovo IdeaPad Slim 15 16AKP10 laptop (x86_64 Ryzen AI 350
CPU)
- Network device as reported by lscpi: 14c3:7925
- Network modules and driver in use: mt7925e
- mediatek chip firmware as of dmesg:
HW/SW Version: 0x8a108a10, Build Time: 20250526152947a WM Firmware Version: ____000000, Build Time: 20250526153043
Referencing regzbot:
#regzbot introduced: 80007d3f92fd018d0a052a706400e976b36e3c87
Please let me know if any other information is needed, or if there is anything else that I can test on my end.
Thanks, Tal Inbar
Hi,
Can you capture a sniffer log? There should be some configuration differences that we can identify from the packet frames during the connection process. So please provide the sniffer logs when connecting to your OpenWRT, TPLink, and Zyxel.
Or you can check for any configuration differences between OpenWRT and the other routers, which might also help with debugging.
Thanks~
Yen.
*********** MEDIATEK Confidentiality Notice *********** The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you!
Hi,
As we discussion on the private mail, this issue has been fixed at this patch: https://patchwork.kernel.org/project/linux-wireless/patch/20250818030201.997...
Thanks.
Hi,
Indeed as discussed privately, the aforementioned patch fixes the issue.
Thanks, Tal
On Mon, Aug 18, 2025 at 6:22 AM Mingyen Hsieh (謝明諺) Mingyen.Hsieh@mediatek.com wrote:
On Thu, 2025-08-14 at 14:55 +0300, Tal Inbar wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content.
Hi Mingyen,
I've collected some of my Routers' configuration information which I'll share with you in a private email message.
Tal
On Mon, Aug 11, 2025 at 12:08 PM Tal Inbar inbartdev@gmail.com wrote:
Hi Mingyen,
I'll see what I can gather and I'll let you know.
Tal
On Mon, Aug 11, 2025 at 4:47 AM Mingyen Hsieh (謝明諺) Mingyen.Hsieh@mediatek.com wrote:
On Fri, 2025-08-08 at 17:37 +0300, Tal Inbar wrote:
External email : Please do not click links or open attachments until you have verified the sender or the content.
typo, laptop model is: Lenovo IdeaPad Slim 5 16AKP10
On Fri, Aug 8, 2025 at 4:14 PM Tal Inbar inbartdev@gmail.com wrote:
Hi,
Since kernel v6.14.3, when using wireless to connect to my home router on my laptop, my wireless connection slows down to unusable speeds.
More specifically, since kernel 6.14.3, when connecting to the wireless networks of my OpenWRT Router on my Lenovo IdeaPad Slim 15 16AKP10 laptop, either a 2.4ghz or a 5ghz network, the connection speed drops down to 0.1-0.2 Mbps download and 0 Mbps upload when measured using speedtest-cli. My laptop uses an mt7925 chip according to the loaded driver and firmware.
Detailed Description:
As mentioned above, my wireless connection becomes unusable when using linux 6.14.3 and above, dropping speeds to almost 0 Mbps, even when standing next to my router. Further, pinging archlinux.org results in "Temporary failure in name resolution". Any other wireless device in my house can successfully connect to my router and properly use the internet with good speeds, eg. iphones, ipads, raspberry pi and a windows laptop. When using my Lenovo laptop on a kernel 6.14.3 or higher to connect to other access points, such as my iPhone's hotspot and some TPLink and Zyxel routers - the connection speed is good, and there are no issues, which makes me believe there's something going on with my OpenWRT configuration in conjunction with a commit introduced on kernel 6.14.3 for the mt7925e module as detailed below.
I have followed a related issue previously reported on the mailing list regarding a problem with the same wifi chip on kernel 6.14.3, but the merged fix doesn't seem to fix my problem: https://lore.kernel.org/linux-mediatek/EmWnO5b-acRH1TXbGnkx41eJw654vmCR-8_xM...
I've tested stable builds of 6.15 as well up to 6.15.9 in the last month, which also do not fix the problem. I've also built and bisected v6.14 on june using guides on the Arch Linux wiki, for the following bad commit, same as the previously mentioned reported issue:
[80007d3f92fd018d0a052a706400e976b36e3c87] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Testing further this week, I cloned mainline after 6.16 was released, built and tested it, and the issue still persists. I reverted the following commits on mainline and retested, to successfully see good wireless speeds:
[0aa8496adda570c2005410a30df963a16643a3dc] wifi: mt76: mt7925: fix missing hdr_trans_tlv command for broadcast wtbl [cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1] wifi: mt76: mt7925: integrate *mlo_sta_cmd and *sta_cmd
Then, reverting *only* 0aa8496adda570c2005410a30df963a16643a3dc causes the issue to reproduce, which confirms the issue is caused by commit cb1353ef34735ec1e5d9efa1fe966f05ff1dc1e1 on mainline.
I've attached the following files to a bugzilla ticket:
- lspci -nnk output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- dmesg output:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
- .config for the built mainline kernel:
https://urldefense.com/v3/__https://bugzilla.kernel.org/attachment.cgi?id=30...
More information:
OS Distribution: Arch Linux
Linux build information from /proc/version: Linux version 6.16.0linux-mainline-11853-g21be711c0235 (tal@arch-debug) (gcc (GCC) 15.1.1 20250729, GNU ld (GNU Binutils) 2.45.0) #3 SMP PREEMPT_DYNAMIC
OpenWRT Version on my Router: 24.10.2
Laptop Hardware:
- Lenovo IdeaPad Slim 15 16AKP10 laptop (x86_64 Ryzen AI 350
CPU)
- Network device as reported by lscpi: 14c3:7925
- Network modules and driver in use: mt7925e
- mediatek chip firmware as of dmesg: HW/SW Version: 0x8a108a10, Build Time: 20250526152947a WM Firmware Version: ____000000, Build Time: 20250526153043
Referencing regzbot:
#regzbot introduced: 80007d3f92fd018d0a052a706400e976b36e3c87
Please let me know if any other information is needed, or if there is anything else that I can test on my end.
Thanks, Tal Inbar
Hi,
Can you capture a sniffer log? There should be some configuration differences that we can identify from the packet frames during the connection process. So please provide the sniffer logs when connecting to your OpenWRT, TPLink, and Zyxel.
Or you can check for any configuration differences between OpenWRT and the other routers, which might also help with debugging.
Thanks~
Yen.
*********** MEDIATEK Confidentiality Notice
The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you!
Hi,
As we discussion on the private mail, this issue has been fixed at this patch: https://patchwork.kernel.org/project/linux-wireless/patch/20250818030201.997...
Thanks.
*********** MEDIATEK Confidentiality Notice
The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. If you are not an intended recipient of this e-mail, or believe that you have received this e-mail in error, please notify the sender immediately (by replying to this e-mail), delete any and all copies of this e-mail (including any attachments) from your system, and do not disclose the content of this e-mail to any other person. Thank you!
linux-stable-mirror@lists.linaro.org
-
Mingyen Hsieh (謝明諺) -
Tal Inbar