[Bug 59548] New: [HSW regression]dmesg with <4> error while booting system

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=59548

          Priority: medium
            Bug ID: 59548
                CC: yangweix.shui at intel.com
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW regression]dmesg with <4> error while booting
                    system
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 73237
  --> https://bugs.freedesktop.org/attachment.cgi?id=73237&action=edit
error dmesg

System Environment:
--------------------------
Arch:       x86_64
Platform:   Haswell
Kernel:    (drm-intel-next-queued)30335dc87a460e36a3b630e329bdcf8537f67eff

Bug detailed description:
-------------------------
It happens on haswell with -queued kernel.
The last known good commit: 29b46977df92852ea9e153361297b8f8c419da92
The last known bad commit: 30335dc87a460e36a3b630e329bdcf8537f67eff

<4>[    4.013321] Modules linked in: i915(+) video button i2c_algo_bit
drm_kms_helper drm i2c_core dm_mirror dm_region_hash dm_log dm_mod
<4>[    4.013386]  [<ffffffffa003cdaf>] ? drm_get_pci_dev+0x14d/0x24f [drm]

Reproduce steps:
----------------
1. dmesg -r | egrep "<[1-6]>" |grep drm

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