Comment 78 for bug 272316

Bob McElrath (bob+ubuntu) wrote :

On further investigation, it seems this was caused by the dastardly iowait kernel bug:

http://bugzilla.kernel.org/show_bug.cgi?id=12309

I'm sure that one is in launchpad somewhere but I couldn't find it.

Trackerd was running in the background right after the upgrade, and because the kernel can't properly load-balance when IO is occuring, everything became extremely slow. The X process (not xournal) was consuming 100% cpu while drawing. The result, ironically was nearly the same symptoms as I saw before with this bug.

Killing trackerd fixed it.

I hope someone fixes this kernel bug soon, it's hitting me from every side...