Looks like one of these 3 upgrades is responsible. The last one was an hour past the log for the first occurrence, but who knows. I'd find it harder to believe that I had this problem for two days and didn't notice.
2013-02-17 10:07:28 upgrade libdrm2 2.4.42+git1302070925.20c560~gd~p 2.4.42+git1302121451.36d182~gd~p 2013-02-17 10:07:34 upgrade libgl1-mesa-dri 9.2~git1302071759.74a17a~gd~p 9.2~git1302141604.34dc4d~gd~p 2013-02-20 05:09:24 upgrade libgl1-mesa-dri 9.2~git1302141604.34dc4d~gd~p 9.2~git1302191430.07cdfd~gd~p Cheers! -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1132541 Title: GL games cause GPU softreset, xorg-edgers and oibaf graphics-drivers. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1132541/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp