There is a regular error (2.6.1,2.6.2) that locks up my X although I don't know if it has anything to[snip]
do with X per se other than that after every lockup i find an error in syslog.
Feb 22 18:23:25 h6n2fls33o811 kernel: Badness in pci_find_subsys at drivers/pci/search.c:167
Feb 22 18:23:25 h6n2fls33o811 kernel: Call Trace:
Feb 22 18:23:25 h6n2fls33o811 kernel: [pci_find_subsys+215/224] pci_find_subsys+0xd7/0xe0