After downgrading libdrm and mesa to the versions in the x-retro PPA, the issue seems to have gone away. Previously, compiz would freeze reliably after <5 min usage. With the x-retro ppa I've been running now 20 minutes with nary a problem.
After downgrading libdrm and mesa to the versions in the x-retro PPA, the issue seems to have gone away. Previously, compiz would freeze reliably after <5 min usage. With the x-retro ppa I've been running now 20 minutes with nary a problem.