Comment 58 for bug 311895

Huh. I tried again just now and it worked. Maybe I just caught it at a bad time during a repo refresh or something before.

Anyhow, I installed the deb manually yesterday, and I've been running the thing most of the day, with the workaround hacks removed from xorg.conf (so it just has the default "detect everything" settings again). No screen blankouts yet. I did just get a flicker, though, just before typing this (I quit out of MythTV so I could run Synaptic and try the repo source add again, the flicker happened right after MythTV quit). The flicker did have the corresponding:

(EE) intel(0): underrun on pipe A!

in Xorg.0.log

It's the one and only occurrence of that error in the log since Xorg was restarted this morning. I'm not sure how to check the registers that were mentioned.