Comment 34 for bug 204996

i too get this sort of lock ups, but *only* when i use the wired connection.
It didn't occur to me until recently as i mostly use the wireless card.

#lspci|grep Ethernet
02:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller

The module i use is e1000.

The lockups appear after ~2, 3 hours of wired connection.