I have an 82845G/GL chipset (Pentium 4 CPU) and after around 20 minutes of using KDE (Just browsing) the screen corrupts for a second or two and the desktop goes back to normal, except that scrolling in chrome is broken.
I'm using SNA acceleration.
I am using arch linux (i686) with xf86-video-intel at 2.20.9 (latest release, packaged by arch).
In my xorg.0.log, it says that it detected a hung GPU, but beforehand it also mentions that the EQ is overflowing.
Created attachment 68497 [details]
My xorg.0.log log file
Created attachment 68498 [details]
Created attachment 68499 [details]
Created attachment 68500 [details]
Screenshot of Google Chromium Corruption
Sadly this is the typical incoherency found with the 845g platform.
*** This bug has been marked as a duplicate of bug 26345 ***