Bug 104898 - backlight problem with the NVIDIA G96GLM [Quadro FX 770M]
Summary: backlight problem with the NVIDIA G96GLM [Quadro FX 770M]
Status: NEW
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: unspecified
Hardware: All All
: medium major
Assignee: Nouveau Project
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-02-01 08:43 UTC by Elmar Stellnberger
Modified: 2018-02-28 15:01 UTC (History)
0 users

See Also:
i915 platform:
i915 features:


Attachments
systool -c backlight -v ... before suspend (22.56 KB, text/plain)
2018-02-15 14:37 UTC, Elmar Stellnberger
no flags Details
systool -c backlight -v ... after suspend (22.56 KB, text/plain)
2018-02-15 14:37 UTC, Elmar Stellnberger
no flags Details
systool -c drm -v ... before suspend (24.72 KB, text/plain)
2018-02-15 14:38 UTC, Elmar Stellnberger
no flags Details
systool -c drm -v ... after suspend (24.72 KB, text/plain)
2018-02-15 14:38 UTC, Elmar Stellnberger
no flags Details

Note You need to log in before you can comment on or make changes to this bug.
Description Elmar Stellnberger 2018-02-01 08:43:46 UTC
There is a problem with the backlight of my FTS Celsius H265 notebook and its NVIDIA G96GLM [Quadro FX 770M] graphics card. When I leave my computer unattended for a while Xfce turns off the backlight of my computer as there is no input. However as soon as it does so my screen stays permanently black. When I move the mouse the backlight goes on again; however the screen content remains black. The same problem occurs with s2ram; after awaking from s2ram Num-Lock works well but the screen stays black. However to evoke this error it isn`t necessary to s2ram; the desktop environment just needs to switch the backlight off. - using kernel 4.15.0-rc9+.
Comment 1 Elmar Stellnberger 2018-02-15 14:37:01 UTC
Created attachment 137375 [details]
systool -c backlight -v ... before suspend
Comment 2 Elmar Stellnberger 2018-02-15 14:37:24 UTC
Created attachment 137376 [details]
systool -c backlight -v ... after suspend
Comment 3 Elmar Stellnberger 2018-02-15 14:38:20 UTC
Created attachment 137377 [details]
systool -c drm -v ... before suspend
Comment 4 Elmar Stellnberger 2018-02-15 14:38:42 UTC
Created attachment 137378 [details]
systool -c drm -v ... after suspend
Comment 5 Elmar Stellnberger 2018-02-15 14:43:44 UTC
Tried to record any changes of device parameters before and after suspend above. However the same values seem to change across reboots as well.
Comment 6 Karol Herbst 2018-02-28 12:46:13 UTC
can you check if this patch fixes it for you?

https://lists.freedesktop.org/archives/nouveau/2018-February/029869.html
Comment 7 Elmar Stellnberger 2018-02-28 15:01:11 UTC
  No, unfortunately the given patch did not resolve the backlight issue for me.


Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.