Satellite P100-324: How to downgrade BIOS to version 2.40

I have the Toshiba Satellite P100-324 with BIOS version 3.30. I need to downgrade BIOS to version 2.40 because it help with stuttering problem when playing games on Windows Vista. But the problem is the version 2.40 is unavailable at Toshiba Europe website (I'm from Russia). I have found this version (one mate gave it to me), but it is for P105 models (US version).
The question is - can I use US version of BIOS 2.40 for my european P100? Is it compatible?

Hi guys
I found this very interesting discussion and I have to clarify something.
You dont need to update the BIOS to another version to play the different games on the Vista OS.
The games couldnt run properly due to the Vista OS.
Several weeks ago Microsoft has published and hotfix which solves some problems with the Multi GPU support on Vista. It was useful for users which use the gamer computer with 2 GPUs
http://support.microsoft.com/?scid=kb%3Ben-us%3B936710
Now the Microsoft has published and patch which solves the problems with the virtual address space usage. This was a reason why some games crashed or didnt run smoothly.
Virtual address space usage in Windows game development
http://support.microsoft.com/?scid=kb%3Ben-us%3B940105&x=11&y=9
Hope it helps!!!
Ps: on this page you will find a interesting discussion regarding the gaming on Vista OS
http://www.computerworld.com/action/article.do?command=viewArticleBasic&articleId=9011 078&pageNumber=1
Best regards

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> i re-install windows every few months to keep the laptop fresh and fast
Many people think the same but especially fast has mostly nothing to do with BIOS update. If everything works well why to change anything and risk something.
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Hi Toshiba support staff,
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I'm a professional programer but i can't test my programs in virtual environment because of this smart bios. I have been waiting this from bios version 3.30. Now i'm using phoenix bios v4.70 but it's not done!
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No, unfortunately you're wrong.
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Hi
I assume youve got a Tecra S11 PTSE3E
The BIOS for Tecra S11 is compatible with Tecra M11 and Tecra A11
On the Toshiba USA driver page you can find all BIOS versions
The BIOS for Tecra A11-S3541 PTSE3U series should be compatible with Tecra S11 PTSE3E series.
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/home.jsp
Choose Tecra A11-S3541 and download the BIOS version you want to install.
Unzip the package and check the readme.txt
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Hi Dr.Bilal,
> Than I reinstalled the whole Windows with formating but it didnt solve the problem
Did you use the Toshiba recovery disk for reinstalling Windows or a Microsoft disk?
If you have used the Toshiba recovery disk that restores factory settings, I assume its a hardware malfunction. Maybe the graphic card or mainboard is faulty and needs replacing.
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I Slightly speak english.
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Hi
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I have been happily using my P100-324 for a couple of months now. Last week it turned out that I need 4 GB of RAM to work, so I bought the extra modules. Since the official specification states the support for that amount of RAM, I didn't expect any problems.
So, right now my situation looks like this:
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Should somebody have any useful information for me, I'd be very happy to hear them.
Regards,
(1) - It was supposed to help, as stated [here|http://support.toshiba-tro.de/kb0/TSB7601WE0007R01.htm]. However, it seems like blaming 32-bit OSes for the lack of memory remapping support in BIOS (required by 945PM) is not the way to go.
(2) - I tested the configuration on the following OSes, without any success:
a: Vista Ultimate 32-bit (with PAE explicitly enabled),
b: Vista Ultimate 64-bit,
C: Debian 64-bit,
d: Sabayon Linux 64-bit,
e: FreeBSD 6.2 (64-bit custom built kernel).
Message was edited by: Admin

ENABLING 4GB RAM / STAGE 2
Changes since the stage 1 (first post):
1) BIOS updated to 4.20-WIN.
Actually, this was done twice. First time, when the BIOS patch was not linked on the official drivers download site yet (I found it manually browsing Toshiba's drivers repo). Later on, I patched the BIOS once again, to make sure there were no changes in officially-enabled files. To make sure I didn't break anything with the first update, I compared the checkums of the two bios upgrade files and they were exactly the same. 
 
In fact, I didn't notice any visible changes between versions 4.00 and 4.20. It turns out that blaming 4.20 for the hot-GPU issue was a mistake (explained in the next point). Both versions of the BIOS act exactly the same, reporting 4096 MB RAM in the BIOS setup, and later on "3072 M System Memory Passed" during the BIOS phase of the bootup.
2) GPU Temperature issue in Vista x64. 
After several days of workin with 64-bit Vista installation I noticed that the bottom of the notebook is becoming incredibly hot. I installed Nvidia's MonitorView and I was shocked to discover that the idle temperature of my GPU is over 90 C! The heavy-load temperature oscillated around 105 C. The strange thing is that when the computer is booting, or when in BIOS, or when working with non-Windows OS, one of the fans works loudly and cools down the GPU. However, at the moment I launch Vista, that fan stops running and the temperature starts increasing. 
 
My small investigation the way my computer acts (described above) shows that it's the GPU driver that may be responsible. As one of this forum gurus stated, +this is the reason why we should only use the official drivers released by Toshiba+. It seems that those drivers are able to fully access the graphical chipset and control the fan (generic nvidia drivers cannot read/control fan's state with my notebook). That brings us to the next point: 
3) 4 GB Ram issue
Many people (even on this forum) state, that in order to use 4 GB RAM one has to use 64-bit Operating System. Even one of the Toshiba's official support pages confirms this point of view. So please help me find an error in this way of thinking (cause maybe all of this mess is because of me): 
 
working with P100-324, I will be able to use 4 GB RAM, as stated in the official specs
it's not possible to use more than 3 GB RAM with 32-bit OS (even though I disagree with that), so I buy 64-bit Vista Ultimate Box) and install it on my notebook, 
The notebook has Designed for Windows XP Windows Vista Capable sticker, so I don't expect any problems (the sticker doesn't say "Vista 32-bit capable), 
Later on I find out that 64-bit systems are not supported by Toshiba, because of the fact that they're not
What do you guys suggest?
A couple of screenshots:
<a href="http://tesserakt.eu/p100_324_4gb_vista64_bios420.png" target="_newWindow" class="jive-link-external">Control Panel -> System</a> 
 
<a href="http://tesserakt.eu/p100_324_mini_2.png" target="_newWindow" class="jive-link-external">Nvidia MonitorView (Polish)</a> 
 
<a href="http://tesserakt.eu/p100_324_mini_3.png" target="_newWindow" class="jive-link-external">Toshiba's Official P100-324 Specs</a> 
 
Regards!

Message was edited by: admin

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[Edited by: admin on 06-Jul-2007 11:10]

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Regards

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Theoretically, you can install Windows Vista to update Bios and return Win 7, then. Before doing, try this:
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> I've already tried an ATX reset, and uninstalling the Microsoft ACPI Compliant Control Method Battery.
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Satellite P100-324: How to downgrade BIOS to version 2.40

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