windows nt 4 driver, after uninstalling, rebooting, BSOD IRQL_NOT_LESS_OR_EQUAL

NTDEV
1

Hi all,

following the last posting, with further experimentation windows NT 4.0
driver, I am able to install and load the driver using “INSTDRV” ddk service
program, and unload and uninstall the driver using the same “INSTDRV”…

one info i found out is after i do the uninstall, if i reboot the driver,
again i get the same BSOD with message IRQL_NOT_LESS_OR_EQUAL…

i use the command

instdrv mydevobjname remove

i would like to know form nt 4 gurus, whether should I remove the registry
entry also…

why this BSOD happens even after uninstalling the windows nt 4.0 driver…

I checked in the unload routine, I am taking care to release memory,
interrupt resource, deleting symbolic link, delete device object…

so, what are the chances even after unistalling the driver, the same driver
attempts to load and
what are the chances it can get BSOD…

can somebody throw some light on this pls…

thanx,

ShivaP

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2

The point here is that your driver has a bug. IRQL_Xxxx BSODs are fairly common during development, and depending on how GROUP and Start are set can even kill a Safe Mode Boot.

As to uninstalling … if your “uninstall”, in this case INSTDRV, does not change Start to 4, or remove the Service key for your driver, or delete the SYS file, the next reboot of a system will load an AutoStart driver and call it’s DriverEntry routine.

Now whip it out and run WinDbg (or SoftIce) and debunk the BSOD.

By the way … group courtesy requests that you only use plain text in posting and remove any evil e-mail disclaimers used as footers. The footers are ignored, and HTML is sometimes totally unreadable. Those tend to upset the more curmudgeonly amongst us. :slight_smile:

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Have Computer, will travel …
909-698-3191
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“Shiva Prasad” wrote in message news:xxxxx@ntdev…
Hi all,

following the last posting, with further experimentation windows NT 4.0 driver, I am able to install and load the driver using “INSTDRV” ddk service program, and unload and uninstall the driver using the same “INSTDRV”…

one info i found out is after i do the uninstall, if i reboot the driver, again i get the same BSOD with message IRQL_NOT_LESS_OR_EQUAL…

i use the command

instdrv mydevobjname remove

i would like to know form nt 4 gurus, whether should I remove the registry entry also…

why this BSOD happens even after uninstalling the windows nt 4.0 driver…

I checked in the unload routine, I am taking care to release memory, interrupt resource, deleting symbolic link, delete device object…

so, what are the chances even after unistalling the driver, the same driver attempts to load and
what are the chances it can get BSOD…

can somebody throw some light on this pls…

thanx,

ShivaP

THIS E-MAIL MESSAGE ALONG WITH ANY ATTACHMENTS IS INTENDED ONLY FOR THE ADDRESSEE
and may contain confidential and privileged information.
If the reader of this message is not the intended recipient,
you are notified that any dissemination, distribution or copy of this
communication is strictly Prohibited.
If you have received this message by error, please notify the sender
immediately, return the original mail to the sender and delete the
message from your system.