Just in case it helps - hope I am not off-topic
Using kernel 2.6.30-rc2 I was able to re-create the X freeze but also I found that X will not run normally even using the default EXA acceleration. The screen freezes, I switch to tty1 then back to tty7, it runs a few more seconds, then freezes again. This used to happen with Ubuntu 8.10 for a while; at that time it was cured by turning off DRI in xorg.conf.
Also I am running Sidux, with kernel 2.6.29-1.slh.6-sidux-686, on a Vaio laptop using Intel 915GM. This does not have any problems with UXA settings (or EXA either). X seems to run smoothly on the laptop despite lower spec graphics.
Just in case it helps - hope I am not off-topic
Using kernel 2.6.30-rc2 I was able to re-create the X freeze but also I found that X will not run normally even using the default EXA acceleration. The screen freezes, I switch to tty1 then back to tty7, it runs a few more seconds, then freezes again. This used to happen with Ubuntu 8.10 for a while; at that time it was cured by turning off DRI in xorg.conf.
Also I am running Sidux, with kernel 2.6.29- 1.slh.6- sidux-686, on a Vaio laptop using Intel 915GM. This does not have any problems with UXA settings (or EXA either). X seems to run smoothly on the laptop despite lower spec graphics.