Bug 81266 - after suspend monitor is darker on nvidia gt510m
Summary: after suspend monitor is darker on nvidia gt510m
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Nouveau Project
QA Contact: Xorg Project Team
Depends on:
Reported: 2014-07-12 14:40 UTC by pineout
Modified: 2019-12-04 08:47 UTC (History)
0 users

See Also:
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
Comment 4 Martin Peres 2019-12-04 08:47:13 UTC
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