FWIW I have a Toshiba Qosmio F15 with the same problem. Sometime in the
breezy cycle it stopped working and hasn't worked since. (I've tried it
with each release up till Edgy) It locks up starting up X at the
nVidia splash if enabled or a black screen if not. I don't have another
machine to SSH in with and the only method I've found is a hard reboot.
Using at to reboot in the future doesn't seem to work.
lspci:
01:00.0 VGA compatible controller: nVidia Corporation NV36 [GeForce FX Go5700]
(rev a1) (prog-if 00 [VGA])
Subsystem: Toshiba America Info Systems Unknown device 0002
Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 10
Memory at cf000000 (32-bit, non-prefetchable) [size=16M]
Memory at a0000000 (32-bit, prefetchable) [size=256M]
Capabilities: [60] Power Management version 2
Capabilities: [44] AGP version 3.0
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system hard locks on reboot
https://launchpad.net/bugs/6616
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