On Mon, Sep 14, 2020 at 12:34 AM Alex Hung alex.hung@canonical.com wrote:
Default backlight interface is AMD's radeon_bl0 which does not work on this system. As a result, let's for ACPI backlight interface for this system.
BugLink: https://bugs.launchpad.net/bugs/1894667
Cc: stable@vger.kernel.org Signed-off-by: Alex Hung alex.hung@canonical.com
V2: correct Cc to stable
drivers/acpi/video_detect.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 2499d7e..05047a3 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -282,6 +282,15 @@ static const struct dmi_system_id video_detect_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "530U4E/540U4E"), }, },
/* 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 */ {--
Applied as 5.10 material, thanks!