From: Alex Hung alex.hung@canonical.com
commit b226faab4e7890bbbccdf794e8b94276414f9058 upstream.
The default backlight interface is AMD's radeon_bl0 which does not work on this system, so use the ACPI backlight interface on it instead.
BugLink: https://bugs.launchpad.net/bugs/1894667 Cc: All applicable stable@vger.kernel.org Signed-off-by: Alex Hung alex.hung@canonical.com [ rjw: Changelog edits ] Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/acpi/video_detect.c | 9 +++++++++ 1 file changed, 9 insertions(+)
--- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -251,6 +251,15 @@ static const struct dmi_system_id video_ DMI_MATCH(DMI_PRODUCT_NAME, "XPS L521X"), }, }, + /* https://bugs.launchpad.net/bugs/1894667 */ + { + .callback = video_detect_force_video, + .ident = "HP 635 Notebook", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP 635 Notebook PC"), + }, + },
/* Non win8 machines which need native backlight nevertheless */ {