[Bug 58594] Dual Monitor eventually freezes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58594

--- Comment #5 from Younes Manton <younes.m at gmail.com> ---
I see a very similar problem on a Thinkpad T400. Using the laptop panel
everything is fine, but plugging in a monitor eventually leads to a very hard
hang. The monitor's resolution is correctly detected in my case, and the GPU is
indentified as "Intel Corporation Mobile 4 Series Chipset Integrated Graphics
Controller (rev 07) (prog-if 00 [VGA controller])".

I can hit the problem within 5 minutes using AccelMethod SNA; using UXA can
give me several hours on average, but eventually it too dies. In both cases:

cat /sys/kernel/debug/dri/0/i915_error_state 
no error state collected

I did grab a register dump after it died using SNA, if that's of any help.

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