I was glancing on Digg this morning and noticed a story about the latest Ubuntu xorg-core update breaking X. My initial thought was, “Well, isn’t that lovely? I just installed that but haven’t restarted X to see the breakage.” Fortunately for the sake of my laziness, the story links to a Ubuntu forums post that tells how to fix the problem. Basically, downgrading to the previous xorg-core package and (re)starting X will fix the problem. The command for downgrading is:
apt-get install xserver-xorg-core=1:1.0.2-0ubuntu10
I am writing this post on the previously afflicted laptop, so the suggested fix really works. After reading the post (but before applying the fix), I decided to restart X to see how badly it was broken. And the result is that it was broken pretty badly. After downgrading xorg-core, X started up right away. Now I have an annoying, “update to the latest version of xorg-core” on my panel. I imagine that Ubuntu will roll a new release out shortly since the breakage is on the front page of Digg.