[Bug 365994] Re: [i915] Random freeze every day or two

[martin]

Hi Milan,

Thanks for taking the time to report this bug. To be able to create a
good upstream bug report we're going to need some more information.
Whenever the xserver gets stuck on an ioctl() like in your case it's
actually the GPU which is hung and that typically means we need to see
what kind of instructions were sent to the GPU through it's
batchbuffers.

This type of analysis requires a new debugging interface which was
included in the 2.6.30 kernel which is not finished yet. So can you
please install 2.6.30-rc3 and then take a debug snapshot of these
buffers? This would be very helpful for us. Luckily Ubuntu already
provides pre-packaged .DEBs for vanilla mainline kernels.

Please refer to this guide:
https://wiki.ubuntu.com/X/Troubleshooting/Freeze
And in particular, follow the steps from the section "Get a Batchbuffer Dump (-intel only)", i.e:
https://edge.launchpad.net/~ubuntu-x-swat/+archive/x-freeze-test

In the next version of Ubuntu the normal kernel will have this type of
debugging interface so we will try to get it included in normal apport
bugs etc (which will be great) but until then a little bit of manual
work is required.

-- 
[i915] Random freeze every day or two
https://bugs.launchpad.net/bugs/365994
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