Re: [PATCH 1/2] ACPI: video: Force backlight native for some TongFang devices
From: Rafael J. Wysocki
Date: Thu Jul 14 2022 - 14:30:26 EST
On Wed, Jul 13, 2022 at 7:25 PM Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
> On 7/7/22 20:09, Werner Sembach wrote:
> > The TongFang PF5PU1G, PF4NU1F, PF5NU1G, and PF5LUXG/TUXEDO BA15 Gen10,
> > Pulse 14/15 Gen1, and Pulse 15 Gen2 have the same problem as the Clevo
> > NL5xRU and NL5xNU/TUXEDO Aura 15 Gen1 and Gen2:
> > They have a working native and video interface. However the default
> > detection mechanism first registers the video interface before
> > unregistering it again and switching to the native interface during boot.
> > This results in a dangling SBIOS request for backlight change for some
> > reason, causing the backlight to switch to ~2% once per boot on the first
> > power cord connect or disconnect event. Setting the native interface
> > explicitly circumvents this buggy behaviour by avoiding the unregistering
> > process.
> > Signed-off-by: Werner Sembach <wse@xxxxxxxxxxxxxxxxxxx>
> > Cc: stable@xxxxxxxxxxxxxxx
> Thanks, the series looks good to me:
> Reviewed-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> for the series.
Both patches applied as 5.20 material, thanks!