Mark a hidden device as unhidden.

NTDEV
1

Hello,

I have written a KMDF driver for a device that is reported via ACPI. The Hardware ID is “ACPI/PNP0C02”.

The disadvantage of a hidden device is, that it is only shown in the device manger when the option “Show hidden devices” is checked and the driver can’t be stopped (disabled) or restarted.

Is there a possibility to change the hidden device to a “normal” device or is this not possible with a device that is reported via ACPI?

Thanks,

Manuel

2

Once hidden you can’t unhide. The only option is that you filter the PnP query and remove the hidden/do not show bits when the irp goes up the stack

Sent from Outlook Mailhttp: for Windows 10 phone

From: manuel.parfant@br-automation.com
Sent: Wednesday, October 28, 2015 6:43 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] Mark a hidden device as unhidden.

Hello,

I have written a KMDF driver for a device that is reported via ACPI. The Hardware ID is “ACPI/PNP0C02”.

The disadvantage of a hidden device is, that it is only shown in the device manger when the option “Show hidden devices” is checked and the driver can’t be stopped (disabled) or restarted.

Is there a possibility to change the hidden device to a “normal” device or is this not possible with a device that is reported via ACPI?

Thanks,

Manuel

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3

Thank you for your answer.
I changed the bits in the device state structure and it works.

WDF_DEVICE_STATE_INIT(&deviceState);
deviceState.DontDisplayInUI = WdfFalse;
deviceState.NotDisableable = WdfFalse;
WdfDeviceSetDeviceState(device, &deviceState);

The device is not hidden and can be disabled. When I disable the device a restart of the PC is necessary. Is it possible to disable the device without a restart? How can I tell the PnP Manger that a restart is not necessary?

Manuel

4

> The device is not hidden and can be disabled. When I disable the device a restart of the PC is

necessary.

This means somebody has vetoed the device removal. Look at “UserPnP” in the event log.

–
Maxim S. Shatskih
Microsoft MVP on File System And Storage
xxxxx@storagecraft.com
http://www.storagecraft.com

5

Thank you for the tip but there is no event log entry in the system log. Neither from the UserPnp nor from another source.

6

Look in setupapi.dev.log for the reason why the restart was needed

Sent from Outlook Mailhttp: for Windows 10 phone

From: manuel.parfant@br-automation.com
Sent: Thursday, October 29, 2015 1:31 AM
To: Windows System Software Devs Interest List
Subject: RE:[ntdev] Mark a hidden device as unhidden.

Thank you for your answer.
I changed the bits in the device state structure and it works.

WDF_DEVICE_STATE_INIT(&deviceState);
deviceState.DontDisplayInUI = WdfFalse;
deviceState.NotDisableable = WdfFalse;
WdfDeviceSetDeviceState(device, &deviceState);

The device is not hidden and can be disabled. When I disable the device a restart of the PC is necessary. Is it possible to disable the device without a restart? How can I tell the PnP Manger that a restart is not necessary?

Manuel

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7

There is no entry in the setupapi.dev.log, but in the setupapi.app.log:

[Boot Session: 2015/10/30 08:43:47.109]

>> [DIF_PROPERTYCHANGE - ACPI\PNP0C02\7]
>> Section start 2015/10/30 08:49:34.507
cmd: “C:\Windows\system32\mmc.exe” C:\Windows\system32\devmgmt.msc
! dvi: Device required reboot: Could not disable device: 17: CR_REMOVE_VETOED
! dvi: {Change State - exit(13)}
! dvi: Error 13: The data is invalid.
!!! dvi: Default installer: failed!
!!! dvi: Error 13: The data is invalid.
<<< Section end 2015/10/30 08:49:34.522
<<< [Exit status: FAILURE(0x0000000d)]

>> [DIF_DESTROYPRIVATEDATA]
>> Section start 2015/10/30 08:49:35.630
cmd: “C:\Windows\system32\mmc.exe” C:\Windows\system32\devmgmt.msc
<<< Section end 2015/10/30 08:49:35.645
<<< [Exit status: SUCCESS (DI_DO_DEFAULT)]

I have added an event handler for EvtDeviecQueryRemove and return STATUS_SUCCESS. The event handler will be called but a restart is still necessary.

8

manuel.parfant@br-automation.com wrote:

There is no entry in the setupapi.dev.log, but in the setupapi.app.log:
…
I have added an event handler for EvtDeviecQueryRemove and return STATUS_SUCCESS. The event handler will be called but a restart is still necessary.

Yes, because some OTHER driver in the stack is vetoing the request. Is
there an application with an open file handle to your device? That will
prevent removal.

–
Tim Roberts, xxxxx@probo.com
Providenza & Boekelheide, Inc.

9

Hi Tim,

thank you for your answer.
No, there is no open file handle to the device. I don’t know who is vetoing the request.