[Bug 92797] New: [BXT] IGT not responding when executing gem_ringfill

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92797

            Bug ID: 92797
           Summary: [BXT] IGT not responding when executing gem_ringfill
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: christophe.prigent at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 119384
  --> https://bugs.freedesktop.org/attachment.cgi?id=119384&action=edit
kern.log

BXT-P
Hardware 
Platform: Broxton P A0 Platform 
CPU Name : Intel(R) @ 1.2 GHz (family: 6, model: 92, stepping: 8) – 4 cores
SoC : BROXTON-P A0
CRB : Apollo Lake RVP Fab1
Software 
Linux distribution: Ubuntu 15.04 64 bits 
kernel 4.3.0-rc5 (26f82bd8) from https://github.com/ideak/linux.git BXT branch
commit 26f82bd872901733b739480e8899a92966ae9292
Author: Imre Deak <imre.deak at intel.com>
Date:   Tue Oct 20 16:44:03 2015 +0300
drm/i915/bxt: update bxt_defconfig
Enable Kconfig options needed for UART/eMMC.
Signed-off-by: Imre Deak <imre.deak at intel.com>
BIOS: APLKRVPA.X64.0104.R43.1510080446 
BIOS (IFWI Version): APLK_IFWI_X64_R_2015_41_5_02
CSE : 3.0.0.1044
KSC : 1.02
One HDMI monitor connected: Samsung ls24c65u

Regression:
------------
No. Tested for the first time

Steps:
-------
1. Execute command:
./gem_ringfill

Actual result:
---------------
1. 5 first tests are pass then nothing happens

Expected result:
----------------
1. Subtests are executed without problem

no error collected in /sys/class/drm/card0/error
/var/log/kern.log contains same infinite logs (cut in the version attached):
[drm:drm_ioctl] pid=1182, dev=0xe200, auth=1, I915_GEM_EXECBUFFER2
[drm:drm_ioctl] pid=1182, dev=0xe200, auth=1, I915_GEM_MADVISE
[drm:drm_ioctl] pid=1182, dev=0xe200, auth=1, I915_GEM_BUSY
[drm:drm_ioctl] pid=1182, dev=0xe200, auth=1, I915_GEM_MADVISE
[drm:drm_ioctl] pid=1182, dev=0xe200, auth=1, I915_GEM_PWRITE

IGT log:
--------
./gem_ringfill
IGT-Version: 1.12-NOT-GIT (x86_64) (Linux: 4.3.0-rc5-intel-bxt+ x86_64)
Subtest blitter: SUCCESS (222.468s)
Subtest render: SUCCESS (362.232s)
Subtest blitter-interruptible: SUCCESS (222.392s)
Subtest render-interruptible: SUCCESS (362.208s)
Subtest blitter-forked-1: SUCCESS (222.308s)

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