I have the same problem with a IBM Thinkpad T41 and the ati/radeon driver.
At the office I use an external CRT monitor (hp p1130).
The laptop freeze a few times a week. The machine is stone dead and have
to be rebooted. it does not respond the ping either...
Ubuntu Breezy did not have this problem at all.
lspci |grep VGA
0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7
LW [Radeon Mobility 7500]
A cut from xorg.conf
Section "Module"
Load "GLcore"
Load "i2c"
Load "bitmap"
Load "dbe"
Load "ddc"
Load "dri"
Load "extmod"
Load "freetype"
Load "glx"
# Load "int10"
Load "record"
Load "type1"
Load "vbe"
EndSection
Section "Device"
Identifier "ATI Technologies, Inc. Radeon Mobility 9000 (M7 LW)"
Driver "radeon"
BusID "PCI:1:0:0"
Option "AGPMode" "4"
Option "MergedFB" "true"
Option "MetaModes" "1024x768+1280x1024"
EndSection
--
[dapper] xrandr freezes the system (radeon, MergedFB)
https://launchpad.net/bugs/47775
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