I worked around it by purging the packages from xorg-edges using ppa-purge. after rebooting I installed 11.04 without any errors. found the solution here: http://ubuntuforums.org/showthread.php?t=1720359
I worked around it by purging the packages from xorg-edges using ppa-purge. after rebooting I installed 11.04 without any errors. found the solution here: http:// ubuntuforums. org/showthread. php?t=1720359