This guy had a similar problem with LCD being disabled: http://lkml.org/lkml/2008/3/26/343
Note the same pipe error: FIFO_UNDERRUN VSYNC_INT_STATUS VBLANK_INT_STATUS
The thread contains no solution to the problem, except a hint about the 'intel' driver being the guilty one.
This guy had a similar problem with LCD being disabled: lkml.org/ lkml/2008/ 3/26/343
http://
Note the same pipe error: FIFO_UNDERRUN VSYNC_INT_STATUS VBLANK_INT_STATUS
The thread contains no solution to the problem, except a hint about the 'intel' driver being the guilty one.