Comment 37 for bug 383973

This has the same call trace as 388357, but that does not necessarily prove it is a dupe - the only real way is to collect a batchbuffer dump. Please follow the directions on this page to collect it. A dump is also required in order for us to forward the bug upstream for further work:

https://wiki.ubuntu.com/X/Troubleshooting/Freeze#How%20to%20Get%20a%20Batchbuffer%20Dump%20(-intel%20only)