Bug 94029 - Intel HD 540 hangs frequently
Summary: Intel HD 540 hangs frequently
Status: CLOSED DUPLICATE of bug 94161
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: XOrg git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-02-07 00:07 UTC by Nell Hardcastle
Modified: 2017-07-24 22:43 UTC (History)
1 user (show)

See Also:
i915 platform: SKL
i915 features:

Attachments
dmesg with drm.debug=0x1e (39.63 KB, text/plain)
2016-02-07 00:07 UTC, Nell Hardcastle 		no flags Details
/sys/class/drm/card0/error dump (84.04 KB, application/octet-stream)
2016-02-07 00:08 UTC, Nell Hardcastle 		no flags Details
dmesg with drm.debug=0x1e (263.36 KB, text/plain)
2016-02-07 08:40 UTC, Nell Hardcastle 		no flags Details
Show Obsolete (1) View All

Description Nell Hardcastle 2016-02-07 00:07:35 UTC 
Created attachment 121561 [details]
dmesg with drm.debug=0x1e

The most reliable way to reproduce this for me is logging in and opening the Unity dash. The system will appear to hang for a few seconds and then recover. The hang happens very frequently. Sometimes it never recovers and I have to reboot.

Tried on Linus' 4.5rc2 kernel and intel-drm-nightly from 2016-02-06 with the same result. The default Ubuntu 16.04 kernel (4.4.0-2-generic) boots with a black screen, so I haven't tried any earlier kernels. Attaching the dmesg and crash dump from intel-drm-nightly.
Comment 1 Nell Hardcastle 2016-02-07 00:08:50 UTC 
Created attachment 121562 [details]
/sys/class/drm/card0/error dump
Comment 2 Nell Hardcastle 2016-02-07 08:40:50 UTC 
Created attachment 121568 [details]
dmesg with drm.debug=0x1e
Comment 3 Nell Hardcastle 2016-02-09 02:15:15 UTC 
After some more experimentation, the hang does not happen if I boot with i915.enable_rc6=0
Comment 4 Chris Wilson 2016-03-01 20:42:51 UTC 

*** This bug has been marked as a duplicate of bug 94161 ***

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