[Bug 92799] New: [BXT] IGT not responding when executing gem_userptr_blits

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92799

            Bug ID: 92799
           Summary: [BXT] IGT not responding when executing
                    gem_userptr_blits
           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 119388
  --> https://bugs.freedesktop.org/attachment.cgi?id=119388&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_userptr_blits

Actual result:
---------------
1. 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 following log repeated intensively (cut in the
version attached):
[drm:drm_ioctl] pid=1123, dev=0xe200, auth=1, DRM_IOCTL_GEM_CLOSE
[drm:drm_ioctl] pid=1123, dev=0xe200, auth=1, I915_GEM_USERPTR

IGT log:
--------
./gem_userptr_blits
IGT-Version: 1.12-NOT-GIT (x86_64) (Linux: 4.3.0-rc5-intel-bxt+ x86_64)
Aperture size is 268435456 MiB
Total RAM is 7814 MiB
Not enough RAM to run test, reducing buffer count.
Subtest input-checking: SUCCESS (0.000s)
Subtest usage-restrictions: SUCCESS (0.000s)
Subtest invalid-null-pointer: SUCCESS (0.000s)
Subtest invalid-gtt-mapping: SUCCESS (0.004s)
Subtest forked-access: SUCCESS (0.008s)
Subtest forbidden-operations: SUCCESS (0.000s)
Testing unsynchronized mappings...
Subtest create-destroy-unsync: SUCCESS (5.032s)
Subtest unsync-overlap: SUCCESS (0.000s)
Subtest unsync-unmap: SUCCESS (0.008s)
Subtest unsync-unmap-cycles: SUCCESS (10.244s)
Subtest unsync-unmap-after-close: SUCCESS (0.012s)
Using 2x5860 1MiB buffers
Killed

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