[vbox-dev] USB EHCI support under Windows

[Bernhard Froehlich]

On Fri, 19 Aug 2011 17:02:12 +0200, Hans Petter Selasky wrote:
> On Friday 22 July 2011 18:06:00 Hans Petter Selasky wrote:
>> Hi,
>>
>> There appears to be a bug when cancelling USB transactions (removing them
>> from the EHCI schedule) on endpoints using the USB 2.0 mode, that the USB
>> device is automatically re-enumerated. Who is responsible for this part?
>> Is there any support available?
> 
> Hi,
> 
> Investigating this issue more properly, I see that VirtualBOX returns
> an error
> code when the Emulated OS tries to clear the stall on any endpoints. This in 
> turn cause the Emulated OS (FreeBSD) to re-enumerate the device.
> 
> Is this a bug or feature in VirtualBOX. Shouldn't clear-stall allways
> succeed,
> even if the data toggle value is not cared about?
> 
> --HPS
> 
> Fix for FreeBSD:
> 
> http://svn.freebsd.org/changeset/base/225000

Is this the problem that prevents USB sticks from beeing detected
correctly on Linux guests? I never got any USB stick properly detected
on Linux, FreeBSD or Windows 7 guests but we had quite a few success
reports for input devices and Windows XP guests so it seems to work fine
in some cases.

-- 
Bernhard Fröhlich
http://www.bluelife.at/