Re: USB2 Avstream driver

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

From: Tom Udale (email_at_address.com)
Date: 02/01/05 

Date: Tue, 1 Feb 2005 14:31:30 -0500

Max,

> Also I can be quite a bit off on this but from what I remember people
have
> been complaining about a bug in USB stack somewhere that would cause
crashes
> upon device re-enable. So try to NOT go down that road and just
restart your
> system instead of doing disabe/enable thing.

Well, I would not have believed it, but this in fact does seem to be the
issue. If I enable the camera and reboot, I can trap DriverEntry,
DeviceAdd and DeviceStart. If I then go and disable/enable the device
from within Windows, it crashes. Go figure.

And naturally, my stream based version of the driver still works as
before: I can disable/enable 1000 times with no troubles. How can this
be? Are they not both riding on top of ks.sys in the end?

I guess this means there some flail in a subset of ks that is not called
by the Stream class but is called by KsInitializeDriver. That is a
shame. This would seem to kind of limit the usefulness of AVStream.

Are you aware if this bug has been fixed in some patch or of some
workaround?

Thanks again for your help.

Tom

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