[Bug 97241] New: [SNB] [DRM] WARNING: CPU: 3 PID: 681 at drivers/gpu/drm/drm_irq.c:1318 drm_wait_one_vblan

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97241

            Bug ID: 97241
           Summary: [SNB] [DRM] WARNING: CPU: 3 PID: 681 at
                    drivers/gpu/drm/drm_irq.c:1318 drm_wait_one_vblan
           Product: DRI
           Version: XOrg git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: samantham at posteo.net
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 125586
  --> https://bugs.freedesktop.org/attachment.cgi?id=125586&action=edit
Xorg Log

Chipset: Sandybridge
System architecture: x86_64
xf86-video-intel/xserver/ version:
kernel version: 4.7.0
Linux distribution: Arch Linux
Machine or mobo model: Lenovo X220
Display connector: Only using internal LVDS screen

Reproduce steps. Probability if not 100% reproducible:
  This problem is usually triggered by changing TTY, though I'm not 100%
certain this is true, because there could be coorelation where I am switching
TTY's because of a slugish responsiveness from the graphical interface to try
and kill off plasmashell to see if it will fix it.  This has happened to me
many times in the last few days.  It seems to be triggered on xf86-video-intel
driver but have not seen it on the glamor/modesetting one.

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