Comment 122 for bug 359392

After updating to the official mesa-7.4-0ubuntu3 I got the freeze after about 4 hrs continuous use. Again, it happened during an alt-tab and was associated with a period of sluggish performance.

I pretty much already knew from prior testing that the fix wouldn't solve it for me, although I was surprised it lasted 4 hrs, usually it hit within 1 hour.

One thing that is quite interesting to note is that the intel_gpu_dump output is completely different from both these two cases.