Created attachment 91842
kernel log 3.13rc7 and 3.11+firmware
The 3.13-rc7 upstream kernel in Ubuntu 13.10 also sometimes crashes, but not as often as the near-identical kernel in Trusty; this might mean the regression is in userspace, or might be the same persistence (presumably a left-behind configuration change from 3.12) we saw earlier.
The blob firmware (in the standard 3.11 kernel) turns the login screen blank, with no recognisable error in the log.
Created attachment 91842
kernel log 3.13rc7 and 3.11+firmware
The 3.13-rc7 upstream kernel in Ubuntu 13.10 also sometimes crashes, but not as often as the near-identical kernel in Trusty; this might mean the regression is in userspace, or might be the same persistence (presumably a left-behind configuration change from 3.12) we saw earlier.
The blob firmware (in the standard 3.11 kernel) turns the login screen blank, with no recognisable error in the log.