Public bug reported:
CONFIGURATION
Lenovo Thinkpad R61 (widescreen model with Nvidia Quadro NVS 140M). Some BIOS
settings modified.
RAM upgraded to 4GB (memtest86 ran OK).
Gutsy amd64 CD installed. Initial aptitude update&&aptitude upgrade ritual not
yet followed.
Uh... using German translation. English menu titles etc. are guessed.
PROBLEM
Switching the graphics driver from vesa to nv will blank the screen and freeze
the system.
The freeze includes the keyboard (Ctrl-Alt-F# won't work, twiddling the
CapsLock key does not twiddle the indicator light).
WORKAROUND
Power off the hard way (press the Power button for ~six seconds to shut the
machine down).
Fortunately, the vesa driver turns out to be still installed after power
cycling.
SPECULATION
I don't think this is related to #185863: changing the interrupt settings in
BIOS didn't affect the symptoms in the least.
Also, the problem occurred with both 32-bit and 64-bit installs (my
recollection of the 32-bit install is a bit hazy though, I'm running 64-bit
Gutsy now).
WHAT I CAN DO
I am a competent C programmer. I'm reasonably familiar with the Linux compiler
toolchain, though I never learned to use gdb.
I am a competent Linux server administrator. This is my first-time encounter
with Gnome.
The machine is destined to become my daily workhorse ASAP. I am willing to try
a lot of things short of unfixable breakage and/or reinstalling.
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
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Lenovo R61: nv driver freezes system
https://bugs.launchpad.net/bugs/185873
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