[snb blorp] GPU hang in zbarcam
@lantw
Submitted by Ting-Wei Lan Assigned to Intel 3D Bugs Mailing List
Description
When I run zbarcam with a non-compositing window manager, such as openbox and xfwm with compositing disabled, it works mostly fine although it may cause the kernel to show some error:
[drm:ilk_display_irq_handler] ERROR Pipe A FIFO underrun [drm:cpt_set_fifo_underrun_reporting] ERROR uncleared pch fifo underrun on pch transcoder A [drm:cpt_serr_int_handler] ERROR PCH transcoder A FIFO underrun
When I run zbarcam with a compositing window manager, such as gnome-shell (mutter) and xfwm with compositing enabled, it also shows the above error, but it stops showing the video captured by the webcam and shows the zbar logo instead after the window is moved. If I keep moving the window for more than 30 seconds, it causes Xorg to hang and it tells me to report the bug here. The system may crash after showing the error.
[drm] stuck on render ring [drm] GPU HANG: ecode 0:0x84fefffc, in Xorg.bin [1114], reason: Ring hung, action: reset [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace. [drm] Please file a new bug report on bugs.freedesktop.org against DRI -> DRM/Intel [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue. [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it. [drm] GPU crash dump saved to /sys/class/drm/card0/error [drm] stuck on render ring [drm] GPU HANG: ecode 0:0x84fefffc, in Xorg.bin [1114], reason: Ring hung, action: reset
Hardware: Intel Core i7-2640M CPU @ 2.80GHz Intel Sandybridge Mobile
Software: Linux 3.18.5 Xorg 1.16.3 Mesa 10.4.3 xf86-video-intel 2.99.916
Window Managers: GNOME Shell 3.14.3 (Mutter 3.14.3) Openbox 3.5.2 Xfwm 4.10.1