[Bug 76801] New: drm:ring_stuck using i915.semaphores=1 on Sandybridge

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76801

          Priority: medium
            Bug ID: 76801
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: drm:ring_stuck using i915.semaphores=1 on Sandybridge
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: philip at turmel.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 96624
  --> https://bugs.freedesktop.org/attachment.cgi?id=96624&action=edit
dmesg excerpt, crash dump, and installed package report

Display freezes for several seconds, usually resumes.  During the frozen time,
the mouse pointer still works, and changes icon appropriately.  Activity
usually continues in the background, and is shown properly when the freeze
ends.

Recently upgraded my vanilla kernel from 3.10.34 to 3.13.7 to see if this has
been resolved.

Although the freeze can happen at any time, it happens more often when using
Virtualbox VMs.

Desktop is KDE 4.12 w/ effects enabled.  Base OS is gentoo unstable.
Complete installed package report appended to the GPU crash dump attachment.

Highlights:
media-libs/mesa-10.1.0
x11-apps/mesa-progs-8.1.0
x11-base/xorg-server-1.15.0
x11-drivers/xf86-input-evdev-2.8.2
x11-drivers/xf86-input-keyboard-1.7.0
x11-drivers/xf86-input-mouse-1.9.0
x11-drivers/xf86-input-synaptics-1.7.3
x11-drivers/xf86-video-intel-2.99.910
x11-libs/cairo-1.12.16
x11-libs/libdrm-2.4.52
x11-libs/libva-1.2.1-r1
x11-libs/libva-intel-driver-1.2.2-r1
x11-libs/libX11-1.6.2

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