Bug 81266

Summary: after suspend monitor is darker on nvidia gt510m
Product: xorg Reporter: pineout <pineout_wrc>
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: NEW --- QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description pineout 2014-07-12 14:40:11 UTC
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.
Comment 1 Ilia Mirkin 2014-07-12 14:48:37 UTC
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?
Comment 2 pineout 2014-07-12 16:52:03 UTC
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.
Comment 3 Germano Massullo 2014-07-13 15:15:57 UTC
(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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