Thanks to Jeffbai's reminder. And I apologize for the late reply to the bug report by Ulrich Müller.
He Lugang has left our company, which explains why he hasn't responded to your emails as they were sent to his old corporate email address.
As his good friend, former colleague, and one of kernel maintainer for another Linux distribution, I understand the urgency of this issue.
I'm currently testing with the affected hardware and will provide a patch soon.
Regarding the temporary workaround for Gentoo, while reverting the previous changes is a viable temporary solution, I'm committed to providing a more comprehensive fix that supports both Lenovo ThinkPad L15 Gen 4 and Lenovo Y9000P 2024.
Thank you all for your patience and understanding.
Thanks, -- WangYuli