[Bug 70570] [BYT]igt/kms_flip/wf_vblank-vs-modeset cause WARNING: CPU: 0 PID: 3716 at drivers/gpu/drm/i915/intel_dp.c:2653 intel_dp_link_down+0x5b/0x18d [i915]()

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70570

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #3 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to comment #1)
> Created attachment 92023 [details] [review]
> don't disable DP port during hot unplug
> 
> I hit the same WARN by first unplugging the DP cable and then doing an
> xrandr --off. The problem is that that during the modeset the driver tries
> to disable the already disabled DP port. One solution would be to leave the
> port enabled during the unplug event handling and only disable it during the
> subsequent modeset.
> 
> The attach patch does this, could you try it?

This bug still can be reproduce with the patch, please check the dmesg "Call
trace with patch" for details, thanks.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20140116/f53417dc/attachment.html>