Bug 105414

Summary: R9 285 agd5f 4.17-wip DC flip_done timed out
Product: DRI Reporter: Andy Furniss <adf.lists>
Component: DRM/AMDgpuAssignee: Default DRI bug account <dri-devel>
Status: RESOLVED FIXED QA Contact:
Severity: normal    
Priority: medium CC: harry.wentland
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg with errors and bt none

Description Andy Furniss 2018-03-09 10:25:54 UTC
Created attachment 137926 [details]
dmesg with errors and bt

agd5f 4.17-wip with only with amdgpu.dc=1 I can hang display with Unreal tournament demo, backtrace at end of attached dmesg.
The game notices and times out after 30sec and I regain display.
This is just on initial menu possibly moving mouse to trigger - time taken to trigger 1 - 5 seconds.

Other things seem OK, but there is also rare display glitch in normal use where it seems that a black frame is displayed or something. May be luck, and I've only seen it a few times, but was moving mouse at the time.

No bisect, recent bugs seem to go away next update anyway + the last "DC team" bug I took time to bisect has been unanswered since December - though it may be very specific to my setup, unanswered = less motivation to bisect.
Comment 1 Andy Furniss 2018-04-12 22:40:38 UTC
fixed in agd5f drm-next-4.17 I guess by 

 Revert "drm/amd/display: disable CRTCs with NULL FB on their primary plane (V2)"

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