[Bug 74955] New: [HSW Regression]boot system has <3>[ 1.627079] [drm:intel_pipe_config_compare] *ERROR* mismatch in port_clock (expected 146250, found 270000)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=74955

          Priority: high
            Bug ID: 74955
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW Regression]boot system has <3>[    1.627079]
                    [drm:intel_pipe_config_compare] *ERROR* mismatch in
                    port_clock (expected 146250, found 270000)
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 94037
  --> https://bugs.freedesktop.org/attachment.cgi?id=94037&action=edit
dmesg

System Environment:
--------------------------
Platform: Haswell
Kernel: (drm-intel-nightly)2f589112609b0a964b3d78c99c0f3a83ac16add6

Bug detailed description:
-----------------------------
Clean boot system, reports <3>[    1.627079] [drm:intel_pipe_config_compare]
*ERROR* mismatch in port_clock (expected 146250, found 270000).
It happens on Haswell with -queued and -nightly kernel. It doesn't happen on
-fixes kernel.

The latest known good commit:3803887e245444aa465d9f3d5a4de6679e21ea45
The latest known bad commit: b6ae3c7c60161a9b1e15b1ccd6412fad65b7d9cf

Reproduce steps:
----------------------------
1. Clean boot system
2. dmesg -r | egrep "<[1-3]>" |grep drm

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