[Bug 82551] New: [HSW Bisected] HDMI hot plug sporadically cause ERROR

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82551

          Priority: medium
            Bug ID: 82551
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: [HSW Bisected] HDMI hot plug sporadically cause ERROR
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: lei.a.liu at intel.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 104550
  --> https://bugs.freedesktop.org/attachment.cgi?id=104550&action=edit
dmesg

==System Environment==
--------------------------
I can't find a good commit.

Non-working platforms: HSW
==kernel==
--------------------------
-nightly: cf1dde8b87834496aabd0a534b1c0695a3572e8d (failed)
    drm-intel-nightly: 2014y-08m-11d-23h-30m-32s integration manifest
-queued: 14bf993e83e1d6924f4bf4506120a15c4b255e58 (failed)
    drm/i915/bdw: Always use MMIO flips with Execlists
-fixes: be71eabebaf9f142612d34d42292b454e984dcb5 (failed)
    Revert "drm/i915: Enable semaphores on BDW"

==Bug detailed description==
-----------------------------
HDMI Hot plug sporadically cause ERROR. Only connecting with ASUS(PB238)
monitor can get a high reproduction rate. I enumerate some situations like
below:
1 Connecting with other monitor, plug in and unplug HDMI ten times, I can't get
this ERROR
2 Connecting with ASUS(PB238) monitor,plug in and unplug HDMI ten times, I get
at least 5 times.
3 Connecting with ASUS(PB238) monitor,plug in and unplug HDMI until get ERROR.
Then connect with other monitor, plug in and unplug HDMI ten times, I get at
least 4 times.


Output ERROR:
[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 228
[   52.007690] Raw EDID:
[   52.007708]          00 ff ff ff ff ff ff 00 04 69 a2 23 6b 9f 00 00
[   52.007742]          31 17 01 03 80 33 1d 78 2a e2 95 a2 55 4f 9f 26
[   52.007775]          11 50 54 b7 ef 00 d1 c0 b3 00 95 00 81 80 81 40
[   52.007808]          81 c0 71 4f 01 01 02 3a 80 ff ff ff ff ff ff ff
[   52.007842]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   52.007891]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   52.007926]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
[   52.007963]          ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

==Reproduce steps==
---------------------------- 
1. plugin and unplug HDMI monitor

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