Nouveau - Aug 2019 - [Bug 111503] New: [NVAA] Impossible to adjust brightness

https://bugs.freedesktop.org/show_bug.cgi?id=111503

            Bug ID: 111503
           Summary: [NVAA] Impossible to adjust brightness
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: not set
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: giallorosso84 at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 145179
  --> https://bugs.freedesktop.org/attachment.cgi?id=145179&action=edit
Attached my kernel log

In a laptop with Amd processor (Turion 64x2) and nvidia GeForce 8200M G
graphics [NVAA] i can't adjust the screen brightness with the fn keys. The
driver currently in use is xorg-nouveau 1.0.16. The kernel currently in use is
5.2.9

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--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Which backlights do you have available? (ls /sys/class/backlight)

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--- Comment #2 from Claudio Pantaleo <giallorosso84 at gmail.com> ---
On /sys/class/backlight there are two backlights, acpi_video0 and nv_backlight.
My distro in use is Solus, but the brightness never worked with any distro.

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--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Can you manually echo values into both and see which, if any, works? (There
should be a pretty obvious file in there, like "brightness", or
something...)

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Martin Peres <martin.peres at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |MOVED
             Status|NEW                         |RESOLVED

--- Comment #4 from Martin Peres <martin.peres at free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
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You can subscribe and participate further through the new bug through this link
to our GitLab instance:
https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/501.

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