Bug 101926

Summary: kabini amdgpu: LVDS not working after resume from suspend (works with radeon)
Product: DRI Reporter: Chí-Thanh Christopher Nguyễn <chithanh>
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium CC: FD
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
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dmesg none

Description Chí-Thanh Christopher Nguyễn 2017-07-26 12:34:37 UTC 
Using Linux 4.12.3 on a netbook with AMD A4-1200 Kabini APU and the amdgpu driver:

Upon resuming from suspend-to-RAM, the LVDS display will become all while.

This situation will persist until a reboot, even after turning it off and on again with xrandr.

Backlight control works fine at all times. External displays (VGA, HDMI) are not affected. The radeon driver does not have this problem.

I noticed that in bug 42960 a very similar issue was fixed in radeon, but am currently unsure whether the fix made it into amdgpu too.
Comment 1 Chí-Thanh Christopher Nguyễn 2017-07-26 12:38:21 UTC 
Created attachment 132985 [details]
dmesg
Comment 2 Martin Peres 2019-11-19 08:20:11 UTC 
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