[Bug 75394] System hangs randomly with error message: [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75394

--- Comment #30 from Chris <cpollock at embarqmail.com> ---
I have noticed several changes to this bug lately. Firstly I've had four
'lockups' since 17 Jan, none of which contain the [drm:i915_hangcheck_elapsed]
*ERROR* Hangcheck timer elapsed... render ring idle issue. Secondly since 14
Jan when I went back from the 3.14* kernel build to Ubuntu's 3.13.0-44-generic
I've been seeing quite often in my syslog:

kernel: [ 1326.412487] [drm:intel_crtc_cursor_set_obj] cursor off
kernel: [ 1326.412493] [drm:g4x_check_srwm] SR watermark: display plane 92,
cursor 2
kernel: [ 1326.412495] [drm:g4x_check_srwm] display watermark is too
large(92/63), disabling
kernel: [ 1326.412497] [drm:intel_set_memory_cxsr] memory self-refresh is
disabled
kernel: [ 1326.412499] [drm:g4x_update_wm] Setting FIFO watermarks - A:
plane=40, cursor=2, B: plane=2, cursor=2, SR: plane=0, cursor=0

I might add that though the system 'appears' to be 'locked up' it is only the
video that is locked, however the mouse cursor will continue to move, if that
makes any sense. The system continues to fetch and process mail with fetchmail
and procmail, SpamAssassin and ClamAv continue to run as well as scripts I have
to report spam and so forth. Whether this change will make any difference in
this bug report I'm not sure. Since the status of this report shows 'Need Info'
still I'm not sure what else can be added to it.

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