[Bug 89589] New: External displays remain blank with linux-3.18.6 after resuming from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89589

            Bug ID: 89589
           Summary: External displays remain blank with linux-3.18.6 after
                    resuming from suspend
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: freedesktop at h.totakura.in
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

External displays connected to a DP Hub remain blank after resuming from
suspend starting from linux-3.18; they used to work with linux-3.17.

My setup has a Haswell Thinkpad connected to a DP Hub.  The laptop's display
turns back on fine.  I am able to turn back the external displays by first
turning them off via xrandr and then turning them on.

This behavior remains with linux-3.18.9 and linux-3.19.1
Is this bug already known?  If not, I can assist you with debugging if you can
tell me where to look at.

-- 
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/20150316/6932850a/attachment.html>