Bug 90999 - xset dpms force off does not turn off LCD backlight
Summary: xset dpms force off does not turn off LCD backlight
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: 2015-06-16 20:24 UTC by freedesktop
Modified: 2019-12-04 09:00 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Output of dmesg (see detail in description) (634.32 KB, text/plain)
2015-06-16 20:24 UTC, freedesktop
no flags Details
/sys/kernel/debug/dri/0/vbios.rom (87.05 KB, application/octet-stream)
2015-06-16 20:29 UTC, freedesktop
no flags Details

Description freedesktop 2015-06-16 20:24:41 UTC
Created attachment 116540 [details]
Output of dmesg (see detail in description)

'xset dpms force off' turns the screen blank but the LCD backlight remains on.

Linux kernel 4.0.5 running on a MacbookPro 11,3.

dmesg.txt attached from running kernel with 'nouveau.debug=VBIOS=trace,I2C=debug,DISP=debug,DRM=debug drm.debug=0xe' and should contain output generated from running xset dpms force off at the end of file.
Comment 1 freedesktop 2015-06-16 20:29:23 UTC
Created attachment 116541 [details]
Comment 2 freedesktop 2015-06-16 20:43:37 UTC
Workaround: using the nv driver
Comment 3 Martin Peres 2019-12-04 09:00:50 UTC
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