Please attach your /var/log/Xorg.0.log[.old] files showing the failure. See https://wiki.ubuntu.com/X/Debugging for more info on debugging X problems, and other info you could include to help triage this bug.
Also, can you test this using the "intel" driver on Gutsy to see if it's still an issue there? Possibly with -intel it's now fixed.
Please attach your /var/log/ Xorg.0. log[.old] files showing the failure. See https:/ /wiki.ubuntu. com/X/Debugging for more info on debugging X problems, and other info you could include to help triage this bug.
Also, can you test this using the "intel" driver on Gutsy to see if it's still an issue there? Possibly with -intel it's now fixed.