Hm. Jason Smith has brought up a bug with similar symptoms to this - hanging in poll from _XReply - which suggests that this might not actually be a driver problem at all, but a more general X/libX11 bug.
Hm. Jason Smith has brought up a bug with similar symptoms to this - hanging in poll from _XReply - which suggests that this might not actually be a driver problem at all, but a more general X/libX11 bug.