Comment # 11 on bug 1110985 from S. B.

(In reply to S. B. from comment #10)
> I've been running the Intel driver still, but with
> the Plasma compositor using the Xrender backend. 
> It's looking tentatively > > > much more stable. I'll
> switch it back to the openGL backend soon to see if
> it starts freezing again.

Ok, I just now had a freeze with the openGL 2.0 backend, and I had to kill Xorg
to recover. Looks like it's the same as the references I linked in #c4,
something about the way Kwin uses openGL exposes an underlying flaw in the
Intel driver.