100% cpu usage in Oneiric (Ubuntu 11.10)

I recently upgraded my work PC from Natty to Oneiric, and discovered that whenever I had a window open that wasn’t maximized, it’s backend process and xorg would use up 100% of the cpu.

I was nearly about to rebuild my machine when I discovered that it only happened for non-maximized GTK windows. As a last ditch effort, I ran gtk-theme-switch2, and switch my theme. Magically, this fixed the problem!

Part of the issue was that I’m running in Fluxbox, not Gnome or Unity. I think somehow it got the theme messed up during the upgrade, and since neither Gnome nor Unity had the chance to set it to a correct theme, it borked.

One thought on “100% cpu usage in Oneiric (Ubuntu 11.10)


    I just spent a day trying to work out WTF was going on, it wasn’t I stumbled upon the fact that maximizing the window made the problem go away that I managed to give Google the right keywords to find your blog.

    For the record, I was using the Oxygen-Molecule theme to get GTK apps to look right in KDE, it was the cause of the issue!

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