Hi Lukas, this backtrace looks more like a GPU lockup (note all the
"*Wait*" calls). GPUs are pretty common to Intel graphics.
For these kinds of issues, reproduce the freeze and collect the following:
* /sys/kernel/debug/dri/0/i915_error_state
* dmesg
* File bug as ubuntu-bug xorg
** Changed in: xorg-server (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/768159
Title:
X server randomly crashes (Segmentation fault at address
0x7f18a55c7010)
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