Device Drivers

display driver handling IOCTL_VIDEO_HANDLE_VIDEOPARAMETERS
Hi, I am trying to handle the IOCTL_VIDEO_HANDLE_VIDEOPARAMETERS in miniport of my display driver. The msdn says that before processing the VIDEOPARAMETER structure miniport must verify the GUID. GUID is the first field of VIDEOPARAMETER structure "Specifies the globally unique identifier (GUID) for this struc... 20 Jul 2006 13:21

any place on drivers for win98 and debuggers
Hi. Is there a group about thigs like debugging on win9x, using wdeb386 cause debugger help isn't sufficient like how to lists object thread is waiting on or just simply change context. Is anybody familiar with waitnodelist struct on win9x thanks and regards ... 18 Jul 2006 13:53

unidrv printers - where are the settings?
Help :-( We used to take back ups of a customised printer settings (print duplex, additional trasys set etc) by exportiing the relevant registry keys.. this was easy and allowed us to restore standard settings onto other user's machines quickly... the new HP printers (4345mfp) now use MS unidrv apparently, and no m... 18 Jul 2006 12:00

how to signal an app from video miniport driver?
resending and widening the audience in the hope of some advice M Taha Masood wrote: Hi I have a video miniport driver and i want to signal my application when somethign interesting happens inside that driver. What i want to do is sort of what in pure WDM land would be said to be as : "open the ... 16 Jul 2006 00:51

KSPROPERTY_TYPE_SET cannot return data??
Greetings, I have discovered behavior in my driver that leads me to believe my long-standing assumptions about the way KSPROPERTY_TYPE_SET/GET works is incorrect. Given the general symmetry of almost everything with the property set calls, I had assumed that the only purpose of the KSPROPERTY_TYPE_SET and KSP... 4 Aug 2006 02:22

Can't DriverPackageUninstall() from DriverStore when OEMxx.INF is missing
I've experienced a similar problem in that SetupCopyOEMInf() returns TRUE indicating that the operation was succeesful, but i reality the oem files are not created in %systemroot%inf. This looks like a bug in vista which they hopefully will fix in the next up issue. I would wait for the fix from msft if you can bec... 18 Jul 2006 12:00

DMA transactions
My user mode app has 4 large buffers(each could be upto 256MB), and I have a device that is capable of doing DMA transfers, by programming the device. The sizes of the DMA transfer are the same for all four of the buffers. In a previous WDM implementation the way we accomplished what we wanted to was as follo... 7 Aug 2006 20:33

about LockFile
Can the file Locked by using LockFile be written by some way? for example FltWriteFile, ZwWriteFile, and so on. ... 20 Jul 2006 22:59

MSVAD
Dear All Does anyone know by default, the default common allocated buffer (m_pvDmaBuffer) filled with anything at all by portcl wavecyclic port driver? The reason I am asking is, in my custom adapter driver based on MSVAD Simple, I copy the same source data I get in IDmaChannel::CopyTo to the default alloca... 5 Jul 2006 23:36

[Q]FilterClass and Layering
Is there a way to have an NDIS IM driver load at the bottom of the driver stack (i.e., layer below FilterClass = failover)? I have read http://support.microsoft.com/default.aspx?scid=kb;en-us;250615 but that doesn't give any clues. One thing I was wondering was to: 1. Define a proprietary FilterClass in my ... 5 Jul 2006 23:05