After upgrading to Linux 2.2.12 from 2.2.5, my X display is odd - it
has lines running down the screen that "sparkle" (it's hard to
describe). There is obviously some timing problem here, but I don't
know where to look. The problem occurs no matter whether I run xdm,
I'm running RedHat 6 and Gnome/Enlightenment on P400 Celeron.