Bug 68635

Summary: [HSW]igt/gem_seqno_wrap randomly fails and causes *ERROR* no progress on bsd ring
Product: DRI Reporter: lu hua <huax.lu>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED WONTFIX QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg
none
i915_error_state none

Description lu hua 2013-08-28 06:06:40 UTC 
Created attachment 84767 [details]
dmesg

System Environment:
--------------------------
Platform:  Haswell
Kernel:    (drm-intel-fixes)2e6efddd203c15ca5c4700511f717c0e9a3ea31a

Bug detailed description:
-----------------------------
It randomly fail and causes [drm:i915_hangcheck_elapsed] *ERROR* no progress on bsd ring. It happens 3 in 5 runs with -fixes kernel. It doesn't happen on -nightly and -queued kernel.

output:
Test assertion failure function random_run_once, file gem_seqno_wrap.c:518:
Failed assertion: write_seqno(val) == 0

Reproduce steps:
----------------------------
1. ./gem_seqno_wrap
Comment 1 lu hua 2013-08-28 06:07:20 UTC 
Created attachment 84768 [details]
i915_error_state
Comment 2 Daniel Vetter 2013-08-28 09:05:11 UTC 
Issue in -fixes that we won't backport since the real-world impact (outside of the really nasty igt testcases) is benign.
Comment 3 Elizabeth 2017-10-06 14:43:40 UTC 
Closing old verified.

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