[vbox-dev] HGCM for USB2.0 required?

[Klaus Espenlaub]

On 04.08.2011 01:43, Ribhi Kamal wrote:
> Is there a special compile-config option that I have to enable inorder
> to get USB 2.0 working? vboxmange list extpacks shows that my extension
> pack is installed and usable, and I'm not getting any runtime errors or
> even warnings.
>
> I've been trouble shooting this problem for two days now and I only
> managed to isolate the problem to VBoxC.dll. The only way I was able to
> get USB 2.0 to work is by replacing my VBoxC.dll with the one packaged
> with the virtualbox install.
>
> Here is my info:
> VirtualBox 4.0.4 -- Self Compiled
> Windows 7 x64

Early VirtualBox 4.0 source code had a bug where a self-compiled package 
would not be able to enable USB 2.0.

I suspect this is what happens here - 4.0.4 is quite old and has this 
bug. Try 4.0.12.

Klaus

>
> Thanks!
>
> On Wed, Aug 3, 2011 at 5:54 AM, Vitali Pelenjow
> <Vitali.Pelenjow at oracle.com <mailto:Vitali.Pelenjow at oracle.com>> wrote:
>
>     No, HGCM is not required for USB2.0.
>
>     You get the HGCM error, because the services (SharedFolders,
>     GuestProperties) were not loaded.
>     But this does not affect USB 2.0 at all.
>
>     Vitali.
>
>     Ribhi Kamal wrote:
>
>         Hi all,
>         Is the HGCM service required in order for USB 2.0 to work?
>
>         For some reason USB 2.0 doesn't work with my build and the only
>         error messages that I see in the machine log is the following:
>         00:09:31.144 ERROR [COM]: aRC=E_UNEXPECTED (0x8000ffff)
>         aIID={515e8e8d-f932-4d8e-9f32-__79a52aead882}
>         aComponent={Console} aText={The service call failed with the
>         error VERR_HGCM_SERVICE_NOT_FOUND}, preserve=false
>         Attached is the complete log.
>
>         Thanks!
>         --
>         -- Ribhi
>
>
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>
>
>
>
>
> --
> -- Ribhi
>
>
>
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