linux-kernel - Re: [PATCH 1/2] ACPI: video: Force backlight native for some TongFang devices

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Message-ID: <CAJZ5v0h31uy6Yp3iyoZN1HnE6AWibyYVm1b8rUy=K0J0y3h-kg@mail.gmail.com>
Date:   Thu, 14 Jul 2022 20:29:56 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Hans de Goede <hdegoede@...hat.com>,
        Werner Sembach <wse@...edocomputers.com>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] ACPI: video: Force backlight native for some TongFang devices

On Wed, Jul 13, 2022 at 7:25 PM Hans de Goede <hdegoede@...hat.com> wrote:
>
> Hi,
>
> 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@...edocomputers.com>
> > Cc: stable@...r.kernel.org
>
> Thanks, the series looks good to me:
>
> Reviewed-by: Hans de Goede <hdegoede@...hat.com>
>
> for the series.

Both patches applied as 5.20 material, thanks!