Comment 19 for bug 658649

alexds9: Here is a link to the ppa's package contents:

https://launchpad.net/~xorg-edgers/+archive/ppa

Be advised that this ppa is dangerous and should not be used for production systems.

Unfortunately, I don't see this getting fixed unless the cause is found and an SRU is applied. I'm afraid this is all I can help for now (as the machines I've seen affected are actually not my own and I have limited access and time).