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[Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug)
From: |
Leonardo E. Reiter |
Subject: |
[Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug) |
Date: |
Tue, 05 Apr 2005 17:33:10 -0400 |
User-agent: |
Debian Thunderbird 1.0 (X11/20050116) |
Iain et al,
Here are some things we've discovered about Service Pack 4 and QEMU..
1. You can go from no service pack to SP4 using KQEMU for the x86 on x86
case, and that works fine. It does not work with i386-softmmu on the
same processor for example unless you have KQEMU installed.
2. Without using KQEMU, you will have to install all service packs
leading up to and include 4 in order (i.e. SP2, then SP3, etc.); but
*beware*: SP3 has a dreaded Microsoft bug that will prevent things from
booting. This is a known Microsoft bug that happens to manifest all the
time (based on our testing) on QEMU. My suggestion for an easy
work-around is this:
a. Install SP2 and reboot
b. save the file c:\winnt\system32\dllcache\msgina.dll somewhere
safe (i.e. your My Documents directory, etc.)
c. Install SP3 but *do not* let it restart (check the box) after
it's done
d. Once you exit SP3 installation, copy the saved msgina.dll
from step b into both the c:\winnt\system32 and
c:\winnt\system32\dllcache directories. First you will have
to rename the existing msgina.dll's in those directories to
something else since they are in use. But be quick, because
the System File Checker which is not easy to disable will
restore them before you know it (after you rename them but
before you restore the saved version)
e. Restart the computer
I suggest you backup your hard disk image that contains Windows 2000
either before you start doing all this or after you install SP2
successfully and shut down, just in case something goes wrong. If all
goes well, Win2K should boot, but if not, you can probably still use the
System Recovery mode or something to fix it. Your safest bet is to make
a backup first.
After you get past this SP3 mess, you can then install SP4. I suggest
you download the SP2-4 installers from http://www.microsoft.com instead
of using Windows update (which will only fetch SP4 anyway). Just do a
search in the download area to find each one.
After you get SP4 installed, beware of the following 2 major problems:
1. schannel.dll will fail to start and therefore IE will have a 0-bit
cipher strength, no matter what you do (additional updates, etc).
Microsoft suggests you restore 2-3 DLLs in this case (including
schannel.dll), but it doesn't work in QEMU. What you might want to do
is grab the DLL's (schannel.dll and rsabase.dll, and I can't recall the
other one) from SP3 or even SP2 and try that. It probably won't work,
but if it does, please let us know. In the event viewer the error
message appears to be useless - saying that schannel failed to start the
RSA engine with an error code 0x57, which we can't find the meaning for
in that context yet. If anyone has any clues, I'd love to hear!
(note that 0-bit cipher in IE causes Windows Update to stop working too)
2. Add/Remove Programs will stop working - showing nothing installed as
far as applications go. You'll see what looks like a broken graphic
link with the text 'Computer graphic' in the place where your list of
installed apps should be. You can usually overcome this by installing
the Windows Installer 3.0 (get it from microsoft.com) after you install
SP4 and restart.
Keep in mind that item 1 did not fail like that with KQEMU enabled. We
didn't test item 2 yet with KQEMU.
At this point we are thinking there is an instruction
emulation/translation error somewhere that of course doesn't show up
with KQEMU because it's likely running native. We're still trying to
track it down in the QEMU code, but any ideas or suggestions from anyone
would be gladly appreciated. At first we thought it had to do with the
80-bit FP ops not using the "l" versions of various glibc math functions
(i.e. sqrt, etc.), but a quick test of replacing those with the "l"
versions made no difference here, and slowed down a lot of other stuff
tremendously. I'll send a follow-up note to the list with some other
findings so anyone who wants to can comment, but there are other issues
that we have encountered as well.
Best regards,
Leo Reiter
--
Leonardo E. Reiter
Vice President of Engineering
Win4Lin, Inc.
Virtual Computing from Desktop to Data Center
Main: +1 512 339 7979
Fax: +1 512 532 6501
http://www.win4lin.com
- A Fix Re: APM bug Re: [Qemu-devel] Re: Suggestion - trap window-close of VM, Struan Bartlett, 2005/04/04
- A Fix Re: APM bug Re: [Qemu-devel] Re: Suggestion - trap window-close of VM, Struan Bartlett, 2005/04/04
- A Fix Re: APM bug Re: [Qemu-devel] Re: Suggestion - trap window-close of VM, Struan Bartlett, 2005/04/04
- Re: A Fix Re: APM bug Re: [Qemu-devel] Re: Suggestion - trap window-close of VM, Iain McFarlane, 2005/04/04
- Re: A Fix Re: APM bug Re: [Qemu-devel] Re: Suggestion - trap window-close of VM, Volker Ruppert, 2005/04/05
- Re: A Fix Re: APM bug Re: [Qemu-devel] Re: Suggestion - trap window-close of VM, Iain McFarlane, 2005/04/05
- [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug),
Leonardo E. Reiter <=
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Hetz Ben Hamo, 2005/04/05
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Leonardo E. Reiter, 2005/04/05
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Hetz Ben Hamo, 2005/04/05
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Leonardo E. Reiter, 2005/04/05
- Re: [Qemu-devel] Re: Windows 2000 SP4, Leonardo E. Reiter, 2005/04/05
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Fabrice Bellard, 2005/04/06
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Hetz Ben Hamo, 2005/04/06
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Jonas Maebe, 2005/04/07
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Flavio Visentin, 2005/04/07
- Re: [Qemu-devel] Re: Windows 2000 SP4 (was Re: APM bug), Derek Fawcus, 2005/04/05