[Bug 111453] New: [SKL] System hang in GfxBench CarChase

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111453

            Bug ID: 111453
           Summary: [SKL] System hang in GfxBench CarChase
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: eero.t.tamminen at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Setup:
- SKL i5 6600K
- Ubuntu 18.04 + updates
- Unity desktop
- drm-tip git kernel (889140938c)
- Rest of the gfxstack build from July 8th git commits:
  - libdrm: 331e51e32f
  - Mesa: 9c7adaeb5f
  - X server: fabc421962
- GfxBench v5 (I assume v4 would work as well)
- FullHD monitor

Test-case:
- Run GfxBench CarChase onscreen test in fullscreen:
  testfw_app --gfx glfw --gl_api desktop_core --width 1920 --height 1080
--fullscreen 1 --test_id gl_4
- Repeat 10x times

Expected outcome:
- No problems, like is the case with SKL GT4e, KBL GT3e and BXT

Actual outcome:
- Whole system hangs with CarChase rendering frozen on screen

This started to happen between following drm-tip commits:
* 2019-08-18 12:57:21 e64af2bda2: drm-tip: 2019y-08m-18d-12h-56m-37s UTC
integration manifest
* 2019-08-19 16:56:48 c3ddf4084e: drm-tip: 2019y-08m-19d-16h-56m-05s UTC
integration manifest

For some reason it doesn't happen (at least within 20x repeats) when using this
week's libdrm / Mesa / X server, only with the listed earlier versions of them.

Regardless of user space versions, kernel shouldn't allow whole system to hang
(network, console etc).

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20190821/59a631f1/attachment.html>