[Xcb] [Bug 94108] New: hang waiting for a reply message (xcb_wait_for_reply)

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Feb 12 10:07:46 CET 2016


            Bug ID: 94108
           Summary: hang waiting for a reply message (xcb_wait_for_reply)
           Product: XCB
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Library
          Assignee: xcb at lists.freedesktop.org
          Reporter: bertrand.piolin at windriver.com
        QA Contact: xcb at lists.freedesktop.org

Created attachment 121702
  --> https://bugs.freedesktop.org/attachment.cgi?id=121702&action=edit

the issue is about the graphic stack hanging waiting for a reply message
As a result the front panel UI (based on Qt5) freezes.

At this stage we cannot pinpoint the root cause, we tried to analyse buffers,
kernel logs, DRI, libdrm but could not find anything obvious. 
The GPU seems to be working fine after the issue occurs.
We also tried to upgrade parts of the graphics stack from Mesalib-9.1.3 to
MesaLib-10.4.4.tar.bz2, libdrm-2.4.40 to libdrm-2.4.58,
xf86-video-intel-2.9.902 to xf86-video-intel-2.99.917 and the issue still

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