[Bug 91955] New: System hangs for 10 to 30 seconds -- killing xserver restores operation

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91955

            Bug ID: 91955
           Summary: System hangs for 10 to 30 seconds  -- killing xserver
                    restores operation
           Product: DRI
           Version: XOrg git
          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: hgondalf at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 118177
  --> https://bugs.freedesktop.org/attachment.cgi?id=118177&action=edit
error logs & pertinent system info

Well described on
http://forums.linuxmint.com/viewtopic.php?f=208&t=178600&p=1064217#p1064217

"...  Cinnamon will freeze everything up for about 10 to 30 seconds. Sometimes
it also takes over two minutes and I decide to kill it from Ctrl+Alt+F1.
Sometimes it unlocks from that terminal (with the help of DISPLAY=:0 cinnamon
--replace), sometimes I have to restart the session and loose any unsaved work.
While frozen, the clock does not update, I cannot use alt+tab, I cannot open
the start menu, I cannot click anything, I basically can't do anything besides
moving my cursor around. The windows will also not update: if someone says
something in a chat, I won't see it until it unfreezes. However music keeps
playing, networking is uninterrupted and everything in ctrl+alt+f1 works fine.

While frozen, if I run top/htop/iotop in the ctrl+alt+f1 terminal, there is
nothing unusual to see. Little cpu load, ssd is mostly idle, RAM is far from
full, and I don't use swap. There doesn't seem to be anything odd in dmesg.

I haven't been able to find steps to reproduce the issue. The frequency seems
to increase when I do a lot of alttabbing or when Libreoffice is open, but I
really can't say that with any certainty."

Copy of sys error log and DRM error log attached.

-- 
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/20150910/66ec2692/attachment-0001.html>