I updated my Toshiba M100 to Lucid 10.04 today. Crashes catatonic.  
Tried acpi=off and tried making an xorg file with vesa set as the driver No 
success.

Followed acpi=off instructions as mentioned earlier. No success.

 Then followed 
sudo apt-add-repository ppa:brian-rogers/graphics-fixes
sudo apt-get update
sudo apt-get dist-upgrade

But linux-image-2.6.34-52-generic not available

So tried booting. No success.

Then discovered and installed
linux-image-2.6.34-v9patch-generic

Again no success.

Reversed the acpi=off i had set previously, and removed the xorg.conf
file.

 I can now boot to a desktop.

Tried then rebooting with the vanilla kernel. river halts. Go back to V9
kernel. Boots to desktop.

Seems to make no difference whether the driver in xorg.conf is set to
vesa or intel. xorg detects my machine as double-headed. Presumably one
is the external monitor socket.

With the v9 patch kernel, acpi=off will apparently break the driver.

-- 
MASTER: [i855] GPU lockup (apport-crash)
https://bugs.launchpad.net/bugs/541511
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