Nouveau - Jul 2014 - [Bug 81266] New: after suspend monitor is darker on nvidia gt510m

https://bugs.freedesktop.org/show_bug.cgi?id=81266

          Priority: medium
            Bug ID: 81266
          Assignee: nouveau at lists.freedesktop.org
           Summary: after suspend monitor is darker on nvidia gt510m
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: pineout_wrc at yahoo.it
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

On samsung RV720 notebook, after suspend, the screen is really dark/grey, but
visible.
I can correct the gamma using command line or a cairo applet, but the
brightness is not responding.
Changed different Linux Os, tried many googled suggestions, none worked for me.

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--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Sounds like your backlight is getting turned down and not restored. Are you
able to control the backlight with linux? You might need to pass in
acpi_backlight=vendor on the kernel cmdline.

Can you attach your dmesg?

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--- Comment #2 from pineout <pineout_wrc at yahoo.it> ---
Incredible I tried this solution (between many) months ago, without success.
Now probably with different Linux/Kernel/DE a simple acpi_backlight=vendor
solved the problem.

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--- Comment #3 from Germano Massullo <germano.massullo at gmail.com> ---
(From Fedora forum I have found out you use Fedora.)
Please fill a bugreport in RedHat bugilla against kernel component, at
attention of Hans de Goede.
It is very similar to https://bugzilla.redhat.com/show_bug.cgi?id=861573

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

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

--- 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
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https://gitlab.freedesktop.org/xorg/driver/xf86-video-nouveau/issues/120.

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