[Bug 101231] New: [BDW] igt at kms_busy@extended-pageflip-hang-newfb-default-A hard hang

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101231

            Bug ID: 101231
           Summary: [BDW]
                    igt at kms_busy@extended-pageflip-hang-newfb-default-A
                    hard hang
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: marta.lofstedt at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

./tests/kms_busy --run-subtest extended-pageflip-hang-newfb-default-A

drm-tip:
commit afd6d4ac7d9c06649fe00300dd608bccc189ca22
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Mon May 29 21:13:32 2017 +0200

    drm-tip: 2017y-05m-29d-19h-12m-29s UTC integration manifest

igt:
IGT-Version: 1.18-g00ce341 (x86_64) (Linux: 4.12.0-rc2+ x86_64)


[ 2176.095496] INFO: task kworker/1:0:17 blocked for more than 120 seconds.
[ 2176.095502]       Tainted: G        W       4.12.0-rc2+ #5
[ 2176.095504] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 2176.095507] kworker/1:0     D    0    17      2 0x00000000
[ 2176.095562] Workqueue: events_long i915_hangcheck_elapsed [i915]
[ 2176.095564] Call Trace:
[ 2176.095571]  __schedule+0x3c4/0x820
[ 2176.095574]  schedule+0x36/0x80
[ 2176.095577]  schedule_preempt_disabled+0xe/0x10
[ 2176.095580]  __ww_mutex_lock.isra.6+0x3de/0x6b0
[ 2176.095583]  __ww_mutex_lock_slowpath+0x16/0x20
[ 2176.095586]  ? __ww_mutex_lock_slowpath+0x16/0x20
[ 2176.095588]  ww_mutex_lock+0x37/0x70
[ 2176.095604]  modeset_backoff+0x4b/0xc0 [drm]
[ 2176.095616]  drm_modeset_backoff+0x10/0x20 [drm]
[ 2176.095649]  intel_prepare_reset+0x38/0xe0 [i915]
[ 2176.095670]  i915_reset_and_wakeup+0xad/0x190 [i915]
[ 2176.095692]  i915_handle_error+0x1df/0x220 [i915]
[ 2176.095695]  ? scnprintf+0x49/0x80
[ 2176.095724]  hangcheck_declare_hang+0xe2/0x110 [i915]
[ 2176.095753]  ? gen6_read32+0x9f/0x1c0 [i915]
[ 2176.095782]  i915_hangcheck_elapsed+0x29f/0x2d0 [i915]
[ 2176.095785]  process_one_work+0x1e9/0x3f0
[ 2176.095787]  worker_thread+0x4b/0x410
[ 2176.095789]  kthread+0x109/0x140
[ 2176.095790]  ? process_one_work+0x3f0/0x3f0
[ 2176.095793]  ? kthread_create_on_node+0x70/0x70
[ 2176.095796]  ret_from_fork+0x2c/0x40
[ 2176.095799] NMI backtrace for cpu 0
[ 2176.095801] CPU: 0 PID: 36 Comm: khungtaskd Tainted: G        W      
4.12.0-rc2+ #5
[ 2176.095802] Hardware name:                  /NUC5i5RYB, BIOS
RYBDWi35.86A.0249.2015.0529.1640 05/29/2015
[ 2176.095803] Call Trace:
[ 2176.095805]  dump_stack+0x63/0x8d
[ 2176.095808]  nmi_cpu_backtrace+0x94/0xa0
[ 2176.095811]  ? irq_force_complete_move+0x150/0x150
[ 2176.095814]  nmi_trigger_cpumask_backtrace+0xff/0x130
[ 2176.095816]  arch_trigger_cpumask_backtrace+0x19/0x20
[ 2176.095818]  watchdog+0x2d8/0x360
[ 2176.095821]  kthread+0x109/0x140
[ 2176.095823]  ? reset_hung_task_detector+0x20/0x20
[ 2176.095825]  ? kthread_create_on_node+0x70/0x70
[ 2176.095827]  ret_from_fork+0x2c/0x40
[ 2176.095830] Sending NMI from CPU 0 to CPUs 1-3:

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