Bug 91625

Summary: [SKL-H SYSTEM HANG] Trip Under the Moonlight webgl demo hangs on nightly
Product: DRI Reporter: Timo Aaltonen <tjaalton>
Component: DRM/IntelAssignee: Mika Kuoppala <mika.kuoppala>
Status: CLOSED DUPLICATE QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: highest CC: gavin.hindman, intel-gfx-bugs, joonas.lahtinen, mika.kuoppala
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: SKL i915 features: GPU hang
Attachments:
Description Flags
error state with nightly none

Description Timo Aaltonen 2015-08-13 15:03:17 UTC 
Created attachment 117667 [details]
error state with nightly

Running TUtM webgl demo on chromium results in system death, but i915.reset=0 lets me get the error state from it. This using nightly from yesterday:

http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2015-08-13-unstable/

distro is Ubuntu 15.04 updated to current, but chromium downgraded to 41.x so that webgl works, maybe some config option needs to be turned on too..

Reproduce steps:
- open chromium
- go to
https://www.chromeexperiments.com/experiment/a-trip-under-the-moonlight
- open the demo
- after grabbing the ship with left mouse button, move it around rapidly for a few seconds
Comment 1 Timo Aaltonen 2015-08-13 15:13:45 UTC 
oh, first you need to install chromium:

apt install chromium-browser=41.0.2272.76-0ubuntu1.1134

looks like this version has webgl enabled by default, the newer version has it permanently disabled AIUI


My SKL-H is MBSH1SEVA SDP, gpu rev04.
Comment 2 Mika Kuoppala 2015-08-14 15:18:30 UTC 
More tips to reproduce: Zoom close in to the center mast of the ship so that the center sail is about 50% visible. Spin it around rapidly with left mouse button. Hangs in few seconds.
Comment 3 Mika Kuoppala 2015-08-14 15:43:40 UTC 

*** This bug has been marked as a duplicate of bug 90425 ***

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