Help: UNEXPECTED_KERNEL_MODE_TRAP

I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
PIII system.

The exact message is:
*** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
UNEXPECTED_KERNEL_MODE_TRAP

Does anyone have any ideas? It started acting up on Wednesday with random
stops and exceptions. It corrupted my system installation so I’ve had to
reinstall W2K. This message is the one I get while trying to install W2K,
so I doubt it’s any of my special device drivers or hardware. I’ve already
replaced memory, disk controller(s) and cables. BTW, this happens when I
try to install Windows 2000. I’m about to try a different disk drive now.
Any ideas would be appreciated.

Thanks,
Greg

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I can’t really offer any help, but I did have a similar problem with one of
my previous PC’s. It wasn’t even multi-processor. I was never able to
figure out the root cause - it seemed most likely to happen during heavy
disk activity… I ended up scrapping the system since it was impossible to
get any work done on it! I always had a hunch that it was power-supply
related…

• Dennis

Dennis Merrill
Embedded Systems Engineer
Thermo Nicolet Corporation

-----Original Message-----
From: Gregory G. Dyess [mailto:xxxxx@pdq.net]
Sent: Friday, November 30, 2001 1:17 PM
To: NT Developers Interest List
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
PIII system.

The exact message is:
*** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
UNEXPECTED_KERNEL_MODE_TRAP

Does anyone have any ideas? It started acting up on Wednesday with random
stops and exceptions. It corrupted my system installation so I’ve had to
reinstall W2K. This message is the one I get while trying to install W2K,
so I doubt it’s any of my special device drivers or hardware. I’ve already
replaced memory, disk controller(s) and cables. BTW, this happens when I
try to install Windows 2000. I’m about to try a different disk drive now.
Any ideas would be appreciated.

Thanks,
Greg

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If you have VIA chipset and use IDE drives, try to examine following:
http://www.viahardware.com/686bfaq.shtm. I had something silimar (maybe the
same) with Apollo Pro133A chipset; unable to install w2k, NT4 random freeze
when IDE DMA is turned on but not problem with XP which contain the latest
version of VIA drivers.

Best regards,

Michal Vodicka
STMicroelectronics Design and Application s.r.o.
[michal.vodicka@st.com, http:://www.st.com]

---

From: xxxxx@pdq.net[SMTP:xxxxx@pdq.net]
Reply To: xxxxx@lists.osr.com
Sent: Friday, November 30, 2001 8:16 PM
To: xxxxx@lists.osr.com
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
PIII system.

The exact message is:
*** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
UNEXPECTED_KERNEL_MODE_TRAP

Does anyone have any ideas? It started acting up on Wednesday with random
stops and exceptions. It corrupted my system installation so I’ve had to
reinstall W2K. This message is the one I get while trying to install W2K,
so I doubt it’s any of my special device drivers or hardware. I’ve
already
replaced memory, disk controller(s) and cables. BTW, this happens when I
try to install Windows 2000. I’m about to try a different disk drive now.
Any ideas would be appreciated.

Thanks,
Greg

---

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RE: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAPThanks for the suggestion. I
already checked and adjusted the power supply voltages this morning. They
had drifted and were a little low. It should also be noted that this
machine has been running for nearly 3 years without problems. It was
running Sunday. I went out of town on Monday and when I returned on
Wednesday, it was BSOD! I’m trying a different hard disk for the system
drive and see if that helps. After that, the only thing left is motherboard
and CPUs.

Greg
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of
xxxxx@thermonicolet.com
Sent: Friday, November 30, 2001 1:29 PM
To: NT Developers Interest List
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP

I can’t really offer any help, but I did have a similar problem with one
of my previous PC’s. It wasn’t even multi-processor. I was never able to
figure out the root cause - it seemed most likely to happen during heavy
disk activity… I ended up scrapping the system since it was impossible to
get any work done on it! I always had a hunch that it was power-supply
related…

• Dennis

Dennis Merrill
Embedded Systems Engineer
Thermo Nicolet Corporation

-----Original Message-----
From: Gregory G. Dyess [mailto:xxxxx@pdq.net]
Sent: Friday, November 30, 2001 1:17 PM
To: NT Developers Interest List
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
PIII system.

The exact message is:
*** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
UNEXPECTED_KERNEL_MODE_TRAP

Does anyone have any ideas? It started acting up on Wednesday with random
stops and exceptions. It corrupted my system installation so I’ve had to
reinstall W2K. This message is the one I get while trying to install W2K,
so I doubt it’s any of my special device drivers or hardware. I’ve
already
replaced memory, disk controller(s) and cables. BTW, this happens when I
try to install Windows 2000. I’m about to try a different disk drive now.
Any ideas would be appreciated.

Thanks,
Greg

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It’s the Intel 440BX chipset. The error appears to be random. I would tend
to discount underlying compatibility problems due to the fact this
configuration has run for nearly 3 years without problems. I’m leaning
heavily towards hardware failure now!

Greg

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Michal Vodicka
Sent: Friday, November 30, 2001 1:40 PM
To: NT Developers Interest List
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP

If you have VIA chipset and use IDE drives, try to examine following:
http://www.viahardware.com/686bfaq.shtm. I had something silimar (maybe the
same) with Apollo Pro133A chipset; unable to install w2k, NT4 random freeze
when IDE DMA is turned on but not problem with XP which contain the latest
version of VIA drivers.

Best regards,

Michal Vodicka
STMicroelectronics Design and Application s.r.o.
[michal.vodicka@st.com, http:://www.st.com]

---

From: xxxxx@pdq.net[SMTP:xxxxx@pdq.net]
Reply To: xxxxx@lists.osr.com
Sent: Friday, November 30, 2001 8:16 PM
To: xxxxx@lists.osr.com
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
PIII system.

The exact message is:
*** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
UNEXPECTED_KERNEL_MODE_TRAP

Does anyone have any ideas? It started acting up on Wednesday with random
stops and exceptions. It corrupted my system installation so I’ve had to
reinstall W2K. This message is the one I get while trying to install W2K,
so I doubt it’s any of my special device drivers or hardware. I’ve
already
replaced memory, disk controller(s) and cables. BTW, this happens when I
try to install Windows 2000. I’m about to try a different disk drive now.
Any ideas would be appreciated.

Thanks,
Greg

---

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My PC wasn’t as old. It ran fine for more than 1.5 years and then bam! I
tried a lot of different things to fix it - I never replaced the drive, but
I did wipe it and reinstall everything… I can usually fix just about
anything but I gave up on this one. Of course, this error message seems
pretty general so it isn’t too likely that they’re related. I had a P3 -
550 with Intel chipset.

• Dennis

Dennis Merrill
Embedded Systems Engineer
Thermo Nicolet Corporation

-----Original Message-----
From: Gregory G. Dyess [mailto:xxxxx@pdq.net]
Sent: Friday, November 30, 2001 1:41 PM
To: NT Developers Interest List
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP

Thanks for the suggestion. I already checked and adjusted the power supply
voltages this morning. They had drifted and were a little low. It should
also be noted that this machine has been running for nearly 3 years without
problems. It was running Sunday. I went out of town on Monday and when I
returned on Wednesday, it was BSOD! I’m trying a different hard disk for
the system drive and see if that helps. After that, the only thing left is
motherboard and CPUs.

Greg
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of
xxxxx@thermonicolet.com
Sent: Friday, November 30, 2001 1:29 PM
To: NT Developers Interest List
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP
I can’t really offer any help, but I did have a similar problem with one of
my previous PC’s. It wasn’t even multi-processor. I was never able to
figure out the root cause - it seemed most likely to happen during heavy
disk activity… I ended up scrapping the system since it was impossible to
get any work done on it! I always had a hunch that it was power-supply
related…

• Dennis

Dennis Merrill
Embedded Systems Engineer
Thermo Nicolet Corporation

-----Original Message-----
From: Gregory G. Dyess [mailto:xxxxx@pdq.net mailto:xxxxx]
Sent: Friday, November 30, 2001 1:17 PM
To: NT Developers Interest List
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP
I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
PIII system.
The exact message is:
*** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
UNEXPECTED_KERNEL_MODE_TRAP
Does anyone have any ideas? It started acting up on Wednesday with random
stops and exceptions. It corrupted my system installation so I’ve had to
reinstall W2K. This message is the one I get while trying to install W2K,
so I doubt it’s any of my special device drivers or hardware. I’ve already
replaced memory, disk controller(s) and cables. BTW, this happens when I
try to install Windows 2000. I’m about to try a different disk drive now.
Any ideas would be appreciated.
Thanks,
Greg

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Over-heating CPU comes to mind.
Check your heatsinks and cooler fans.

Max

----- Original Message -----
From: “Gregory G. Dyess”
To: “NT Developers Interest List”
Sent: Friday, November 30, 2001 10:16 PM
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

> I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
> PIII system.
>
> The exact message is:
> *** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
> UNEXPECTED_KERNEL_MODE_TRAP
>
> Does anyone have any ideas? It started acting up on Wednesday with random
> stops and exceptions. It corrupted my system installation so I’ve had to
> reinstall W2K. This message is the one I get while trying to install W2K,
> so I doubt it’s any of my special device drivers or hardware. I’ve already
> replaced memory, disk controller(s) and cables. BTW, this happens when I
> try to install Windows 2000. I’m about to try a different disk drive now.
> Any ideas would be appreciated.
>
> Thanks,
> Greg
>
>
> —
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
>

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> when IDE DMA is turned on but not problem with XP which contain the latest

version of VIA drivers.

So, VIA has some special kind of drivers for IDE controller?

Max

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RE: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAPReplacing a CPU cooler usually solves this.

----- Original Message -----
From: xxxxx@thermonicolet.com
To: NT Developers Interest List
Sent: Friday, November 30, 2001 10:29 PM
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP

I can’t really offer any help, but I did have a similar problem with one of my previous PC’s. It wasn’t even multi-processor. I was never able to figure out the root cause - it seemed most likely to happen during heavy disk activity… I ended up scrapping the system since it was impossible to get any work done on it! I always had a hunch that it was power-supply related…

• Dennis

Dennis Merrill
Embedded Systems Engineer
Thermo Nicolet Corporation

-----Original Message-----
From: Gregory G. Dyess [mailto:xxxxx@pdq.net]
Sent: Friday, November 30, 2001 1:17 PM
To: NT Developers Interest List
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
PIII system.

The exact message is:
*** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
UNEXPECTED_KERNEL_MODE_TRAP

Does anyone have any ideas? It started acting up on Wednesday with random
stops and exceptions. It corrupted my system installation so I’ve had to
reinstall W2K. This message is the one I get while trying to install W2K,
so I doubt it’s any of my special device drivers or hardware. I’ve already
replaced memory, disk controller(s) and cables. BTW, this happens when I
try to install Windows 2000. I’m about to try a different disk drive now.
Any ideas would be appreciated.

Thanks,
Greg

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> It’s the Intel 440BX chipset. The error appears to be random. I would tend

to discount underlying compatibility problems due to the fact this
configuration has run for nearly 3 years without problems.

…and then you switched it off and back on - and problem started?
Then this is surely a CPU heatsink.

Max

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> ----------

From: xxxxx@storagecraft.com[SMTP:xxxxx@storagecraft.com]
Reply To: xxxxx@lists.osr.com
Sent: Saturday, December 01, 2001 3:45 AM
To: xxxxx@lists.osr.com
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP

> when IDE DMA is turned on but not problem with XP which contain the
latest
> version of VIA drivers.

So, VIA has some special kind of drivers for IDE controller?

Yes, for XP: “VIA Bus Master IDE Controller” viaide.sys with funny copyright
“Copyright (C) Microsoft Corp. 2000-2005” (VIA believes to survive next 4
years :). It is listed together with atapi.sys and pciidex.sys (Driver
Details) and is rather small (4 kB). Also, imports only few routines:

HAL.dll
5A WRITE_PORT_ULONG
54 READ_PORT_ULONG

PCIIDEX.SYS
1 PciIdeXGetBusData
2 PciIdeXInitialize
3 PciIdeXSetBusData

Maybe somebody can explain how it works.

Best regards,

Michal Vodicka
STMicroelectronics Design and Application s.r.o.
[michal.vodicka@st.com, http:://www.st.com]

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No, the system runs 24x7 whether I’m at work or not. It’s also on a very
hefty UPS.

The problem started while I was gone. I tried different hard drives and
removed all non essential boards and one of the CPUs. I have verified PS
voltages, CPU fans (2 on each CPU), CPU temps, etc. I’ve replaced the
memory and disk controllers. Nothing, nada! Nothing obvious. My next
components are MB and CPU(s). I really hate to do that too. I think I’m
just going to set that system aside and use my laptop. It’s a lot faster
anyway.

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Maxim S. Shatskih
Sent: Friday, November 30, 2001 8:47 PM
To: NT Developers Interest List
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP

It’s the Intel 440BX chipset. The error appears to be random. I would
tend
to discount underlying compatibility problems due to the fact this
configuration has run for nearly 3 years without problems.

…and then you switched it off and back on - and problem started?
Then this is surely a CPU heatsink.

Max

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RE: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAPBoth CPUs have dual fan
heatsinks with all 4 fans relatively new (less than 6 months old). The
temperature monitoring shows both CPUs rather cool. They show only about
90-95 degrees. This seems a bit odd, but within reasonable, I guess.

Greg
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Maxim S. Shatskih
Sent: Friday, November 30, 2001 8:44 PM
To: NT Developers Interest List
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP

Replacing a CPU cooler usually solves this.

----- Original Message -----
From: xxxxx@thermonicolet.com
To: NT Developers Interest List
Sent: Friday, November 30, 2001 10:29 PM
Subject: [ntdev] RE: Help: UNEXPECTED_KERNEL_MODE_TRAP

I can’t really offer any help, but I did have a similar problem with one
of my previous PC’s. It wasn’t even multi-processor. I was never able to
figure out the root cause - it seemed most likely to happen during heavy
disk activity… I ended up scrapping the system since it was impossible to
get any work done on it! I always had a hunch that it was power-supply
related…

• Dennis

Dennis Merrill
Embedded Systems Engineer
Thermo Nicolet Corporation

-----Original Message-----
From: Gregory G. Dyess [mailto:xxxxx@pdq.net]
Sent: Friday, November 30, 2001 1:17 PM
To: NT Developers Interest List
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
PIII system.

The exact message is:
*** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
UNEXPECTED_KERNEL_MODE_TRAP

Does anyone have any ideas? It started acting up on Wednesday with
random
stops and exceptions. It corrupted my system installation so I’ve had
to
reinstall W2K. This message is the one I get while trying to install
W2K,
so I doubt it’s any of my special device drivers or hardware. I’ve
already
replaced memory, disk controller(s) and cables. BTW, this happens when
I
try to install Windows 2000. I’m about to try a different disk drive
now.
Any ideas would be appreciated.

Thanks,
Greg

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Wash ur CPU and hang it for a sun bath …needs a break.
just joking

“Maxim S. Shatskih”
om>
Sent by: cc:
xxxxx@lis Subject: [ntdev] Re: Help:
ts.osr.com UNEXPECTED_KERNEL_MODE_TRAP

12/01/01 10:43 AM
Please respond to “NT
Developers Interest
List”

Over-heating CPU comes to mind.
Check your heatsinks and cooler fans.

Max

----- Original Message -----
From: “Gregory G. Dyess”
To: “NT Developers Interest List”
Sent: Friday, November 30, 2001 10:16 PM
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

> I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
> PIII system.
>
> The exact message is:
> *** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
> UNEXPECTED_KERNEL_MODE_TRAP
>
> Does anyone have any ideas? It started acting up on Wednesday with
random
> stops and exceptions. It corrupted my system installation so I’ve had to
> reinstall W2K. This message is the one I get while trying to install
W2K,
> so I doubt it’s any of my special device drivers or hardware. I’ve
already
> replaced memory, disk controller(s) and cables. BTW, this happens when I
> try to install Windows 2000. I’m about to try a different disk drive
now.
> Any ideas would be appreciated.
>
> Thanks,
> Greg
>
>
> —
> You are currently subscribed to ntdev as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
>

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Perhaps I will replace the thermal pads between the heat sink and CPUs. We
do board repairs here, so I should be able to find some monkey grease
somewhere…

Thanks for the suggestions.

-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of
xxxxx@jil.co.in
Sent: Saturday, December 01, 2001 12:04 AM
To: NT Developers Interest List
Subject: [ntdev] Re: Help: UNEXPECTED_KERNEL_MODE_TRAP

Wash ur CPU and hang it for a sun bath …needs a break.
just joking

“Maxim S. Shatskih”
Interest List"
om>
Sent by: cc:
xxxxx@lis Subject: [ntdev] Re:
Help:
ts.osr.com UNEXPECTED_KERNEL_MODE_TRAP

12/01/01 10:43 AM
Please respond to “NT
Developers Interest
List”

Over-heating CPU comes to mind.
Check your heatsinks and cooler fans.

Max

----- Original Message -----
From: “Gregory G. Dyess”
To: “NT Developers Interest List”
Sent: Friday, November 30, 2001 10:16 PM
Subject: [ntdev] Help: UNEXPECTED_KERNEL_MODE_TRAP

> I get the above error (UNEXPECTED_KERNEL_MODE_TRAP) on my dual-processor
> PIII system.
>
> The exact message is:
> *** STOP: 0x0000007F (0x0000000D, 0x00000000, 0x00000000, 0x000000)
> UNEXPECTED_KERNEL_MODE_TRAP
>
> Does anyone have any ideas? It started acting up on Wednesday with
random
> stops and exceptions. It corrupted my system installation so I’ve had to
> reinstall W2K. This message is the one I get while trying to install
W2K,
> so I doubt it’s any of my special device drivers or hardware. I’ve
already
> replaced memory, disk controller(s) and cables. BTW, this happens when I
> try to install Windows 2000. I’m about to try a different disk drive
now.
> Any ideas would be appreciated.
>
> Thanks,
> Greg
>
>
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> years :). It is listed together with atapi.sys and pciidex.sys (Driver

Details) and is rather small (4 kB). Also, imports only few routines:

HAL.dll
5A WRITE_PORT_ULONG
54 READ_PORT_ULONG

PCIIDEX.SYS
1 PciIdeXGetBusData
2 PciIdeXInitialize
3 PciIdeXSetBusData

Maybe somebody can explain how it works.

ATAPI.SYS in w2k is like SCSIPORT. Another SCSIPORT, slightly patched.
The debugger shows stuff like atapi!SpProcessCompletedRequest or such, they even did not change the name prefixes.
PCIIDEX.SYS is like NT4 ATAPI.SYS
As about the minidrivers - IIRC they do the customized DMA support like the Linux IDE stuff does.

Max

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