Hi all.
I'm having a really hard time enabling kernel debugging on Win7.
I've tried the following:
bcdedit /debug on
bcdedit /bootdebug on
bcdedit /dbgsettings 1394 /start active
And also without /bootdebug, and with /start disable, and also with /noumex. Nothing works. The system hangs straight after I log in, or it hangs after a short while. It's far from the simple recommended "bcdedit /debug on"!
Does anyone have any hints and tips? It's driving me insane!
Thanks.
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Matthew van Eerde
AKA Maurits
What is the output of:
bcdedit
bcdedit /dbgsettings
?
What command are you using on the host computer to connect to the target? -
C:\Users\coca>bcdedit /dbgsettingsMatthew van Eerde said:What is the output of:
bcdedit
bcdedit /dbgsettings
?
What command are you using on the host computer to connect to the target?
debugtype 1394
debugstart Disable
noumex Yes
The operation completed successfully.
However I only want to do local kernel debugging. Thanks for your reply.
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Matthew van Eerde
AKA Maurits
I see - you want to do "live" kd? I assume you're doing "kd -kl" to connect. What's the output of that command?jujitsu_sickness said:
C:\Users\coca>bcdedit /dbgsettingsMatthew van Eerde said:*snip*
debugtype 1394
debugstart Disable
noumex Yes
The operation completed successfully.
However I only want to do local kernel debugging. Thanks for your reply.
I thought to do 1394 debugging you had to specify a channel: "bcdedit /dbgsettings 1394 CHANNEL:17"
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Matthew van Eerde
AKA Maurits
> The system hangs straight after I log in, or it hangs after a short while
Sounds like you're running into problems too severe for live kd. How feasible is it for you to get a second machine w/ 1394 and do two-machine debugging? -
> The system hangs straight after I log in, or it hangs after a short while
It may be a bit late, but I'd bet you got Skype starting up with Windows. Well, that was at least the case when my machine froze/hung for no apparent reason. Took me some time (+Nullmodemcable and WinDbg running on another machine) to realize that Skype initiated user-mode exceptions caused the freeze. The NOUserModeEXceptions parameter did the job for me, but I've read that it is buggy so it might not work on your machine .
If you don't want to restart your PC every time just to use Skype OR debug, you can always use the "/start disable" dbgsettings parameter and activate the debugger using kdbgctrl and disabling user-mode exceptions from there (-du switch).
I hope i wasn't wrong and it isn't yet to late to help you out ;-D
Cheers
Valentin
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