Public bug reported:
Binary package hint: xorg
In Ubuntu 8.04, with 1:7.3+10ubuntu10, on an Intel 965Q display, I'm
getting a crash or black screen when I click on an MP3 file link in
Firefox (3 beta 5). Once the screen is blank, it appears that the
machine is still running, and I *think* a C-A-Backspace is resetting the
X server, but it won't come back. Nothing I do short of a reboot will
restore the display.
I'm operating this display rotated left 90 degrees, which is a feature
that only really started working in Ubuntu 8, so perhaps that's
involved.
Attached is an X server log that is (I believe) of the attempted
restart, which fails. The notable lines at the end are
(WW) intel(0): PRB0_CTL (0x0001f801) indicates ring buffer enabled
(WW) intel(0): PRB0_HEAD (0x0100895c) and PRB0_TAIL (0x00008988) indicate ring
buffer not flushed
(WW) intel(0): Existing errors found in hardware state.
Apparently this stymies the X server. There is also a suspicious line
in /var/log/messages at the time of the blank/crash
May 1 13:45:03 delta kernel: [791787.781107] mtrr: type mismatch for
c0000000,10000000 old: write-back new: write-combining
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
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web page -> X server crash/blank, no display until reboot
https://bugs.launchpad.net/bugs/225400
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