Blank screen after display driver update Satellite Pro P200

I installed the latest ATI Mobility Radeon HD2600 display driver (8.432, from the Toshiba site via Tempo) on my Satellite Pro P200 yesterday. On rebooting everything looks fine as far as the Windows Vista Business "Please wait ..." screen, but instead of displaying the login page I get a blank screen (with a mouse cursor that moves around as normal). All I can do at this point is power off, and I've run out of ideas on how to get any further.
Things I've tried:
# booting into safe mode, low-resolution video or last known good configuration all result in the same blank screen.
# connecting to the system using remote desktop (to disable the driver) isn't possible because the system hasn't loaded the network drivers yet.
# I can't revert to a restore point because Vista can't find any (I made a manual one after installing windows updates on a couple of days ago).
I can run a command prompt from the system recovery options and would prefer to use that to disable the driver +if+ I knew how before resorting to the more drastic options.
A web search (http://www.google.co.uk/search?q=ati+catalyst+vista+blank+screen&hl=en&sa= N) reveals that this has happened on a wide range of laptops with
previous releases of the driver, but none of the links I've looked at give a solution that's available to me.

No joy with an external screen so I bit the bullet and reinstalled from the product recovery disk. I tried expert mode to retain the data partition but that failed twice, so I had to restore it from the previous day's backup after doing a full reinstall. Two consolations, though.
# It allowed me to increase the size of the data partition.
# The display driver update worked fine on the fresh install.
Needless to say I've since found [http://support.microsoft.com/kb/927525] which describes how you can disable a problem device driver (atikmdag in my case) from the system recovery command prompt :-(
Hopefully the instructions in there will help anybody who gets caught with similar problems.

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"Massimo Rosen" <[email protected]> schrieb im Newsbeitrag
news:[email protected]..
> Hi,
>
> Andreas Schild wrote:
>>
>> Hi,
>>
>> after update a VMWare-SLES10SP2-Server with DOM and Webaccess HP703HP1 to
>> HP703HP3 I got a blank screen after starting the machine.
>
> What do you mean "a blank screen"? A blank screen where?
>
>> All logs look got but I can't login in. Only a blank web page. No login.
>> No
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>
> I'm sorry, but it's totally unclear what you're talking about. What web
> page?
>
> CU,
> --
> Massimo Rosen
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> No emails please!
> http://www.cfc-it.de

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