Dear All,
I have a filter driver, which is a lower filter driver to BthUSB.
My problem is with its installation. When I install this filter driver it replaces the existing
lowerfilters value in the registry. I need the existing lower filter value as there are other lower filter drivers provided by vendor.
I face this issue even after using Append flag in the addreg section of inf file.
eg.
[MyFilter.NT.HW.AddReg]
HKR,“LowerFilters”,0x00010008,“MyFilter”
How do I resolve this issue ?
I want to update lowerfilters section in registry along with the old registry settings of vendor filter driver.
BR,
Dhaval
On Jan 20, 2015, at 10:19 PM, xxxxx@gmail.com wrote:
I have a filter driver, which is a lower filter driver to BthUSB.
My problem is with its installation. When I install this filter driver it replaces the existing
lowerfilters value in the registry. I need the existing lower filter value as there are other lower filter drivers provided by vendor.
…
How do I resolve this issue ?
I want to update lowerfilters section in registry along with the old registry settings of vendor filter driver.
You cannot use an INF package to modify an existing driver. Every PnP INF completely replaces whatever driver was there before.
Adding a filter driver does not require an INF. You can do it all with a simple application. Copy the file into place, create a service for it, then use the SetupDi APIs to find your device and modify the LowerFilters key.
—
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.
Hi tim,
Thanks for your reply. I followed the steps u suggested and am able to install the filter driver without inf file.
BR,
Dhaval
Hi Tim,
I have one more question.
How do I get WHCK logo for the filter driver with this kind of installation ?
Is the procedure to get WHCK logo for filter driver different ?
BR,
Dhaval
xxxxx@gmail.com wrote:
I have one more question.
How do I get WHCK logo for the filter driver with this kind of installation ?
Is the procedure to get WHCK logo for filter driver different ?
You can’t get the logo for a filter driver. The logo only applies to
real pieces of hardware. If you have a complete package that includes a
filter driver, you can submit that.
It doesn’t make sense to submit a filter driver to WHQL at all. The
WHQL signature only applies to PnP driver installs, and a filter driver
by itself is not installed using a PnP installation, as you have discovered.
–
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.