If he is installing on pnp0501, the arbieter has already assigned the
port number.
D
This posting is provided “AS IS” with no warranties, and confers no
rights
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of xxxxx@des.co.uk
Sent: Tuesday, March 09, 2004 9:38 AM
To: Windows System Software Devs Interest List
Subject: RE: [ntdev] A dissapearing COM port
Do you check the COM Arbiter before grabbing a port?
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com]On Behalf Of Doron Holan
Sent: 09 March 2004 17:29
To: Windows System Software Devs Interest List
Subject: RE: [ntdev] A dissapearing COM port
Is /debug on the boot.ini entry? If present on ACPI systems, there is
no com port enumerated (vs a non acpi system where the com port is !'ed
out).
D
This posting is provided “AS IS” with no warranties, and confers no
rights
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Dan Tower
Sent: Tuesday, March 09, 2004 9:15 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] A dissapearing COM port
I have a customer with a device that loses its COM port after they
install
my driver. This driver is installed by updating the com port in device
manager with the new driver. This works fine on thousands of Tablet
PCs.
After installing on this particular unit though, and rebooting, the COM
port
is not found and there is no ACPI\pnp0501 listed in the enum section in
the
registry. Needless to say, this results in the driver not being loaded.
I don’t think it is caused by something my driver is doing directly but
I’m
at a loss to figure out why this happens. Any explanation or suggestion
would be greatly appreciated.
-Dan
Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
You are currently subscribed to ntdev as: xxxxx@des.co.uk
To unsubscribe send a blank email to xxxxx@lists.osr.com
Questions? First check the Kernel Driver FAQ at
http://www.osronline.com/article.cfm?id=256
You are currently subscribed to ntdev as: xxxxx@windows.microsoft.com
To unsubscribe send a blank email to xxxxx@lists.osr.com