[Ubuntu-x-swat] [Bug 658139] Re: X server crashes shortly after logging in

I'm having the same issue here. At first I thought it was MythTV related, but on further investigation (and crashes without myth running), it appears to be either driver or Xorg related. I suspect this may be a duplicate of https://bugs.launchpad.net/ubuntu/+source/mythtv/+bug/660833 in another

[Ubuntu-x-swat] [Bug 639933] Re: 10.04 - 10.10beta: could not install the upgrades - Couldn't configure pre-depend x11-common for x11-xkb-utils, probably a dependency cycle.

I'm upgrading from 10.04 to 10.10 of Mythbuntu and encountering the same error. The following workaround did it for me (based on the suggestions above): dpkg --force-depends --remove x11-xkb-utils // this may or may not be necessary wget