USB exception ?due to low speed port

[blueytoo]

Win7-64bit guest. MacOS 10.6.8 64bit host. USB Oscilloscope Siglent SDS 1102CML using NI-VISA USBTMC driver 5.1.2, EasyScopeX software.

This particular software seems a bit underbaked and not well documented. It does actually work in Bootcamp having been advised exactly which driver version to install. Has take a few days to get this far!

In VB, it does not work. There are 2 issues:

1. Despite USB2 support being checked, the device attaches to a low speed port, and Windows report this as a problem.
2. Trying to connect to the oscilloscope generates a timeout exception.

Logs attached.

Screenshot here ​http://i197.photobucket.com/albums/aa145/cheongi/usb-wrong-port-Screenshot2013-06-28at74400am.png

[blueytoo]

VBlogs and screen shot

[vasily Levchenko]

Does it change anything if you configure VM to use only 1 virtual processor?

[blueytoo]

I'm guessing the problem is that hardware has 2 identical USB hubs built in one for internal (trackpad, camera) and one for external. VB is mapping one as a low-speed hub and one as high-speed and all the plug-in external ports are connected to the low speed one in VB. Using bootcamp/Win7 and on OSX, both hubs are high speed USB with identical vendor/product ids.

In that sense, the USB2 support checkbox in VB settings is lying, because all available external USB ports are not mapped as USB2.

[ieg]

The problem might be in the USB device or the host system, instead of VirtualBox. I have a GPS that is supposed to be USB 2, but it attaches as USB 1 to my MacBook Pro.

I suspect that VirtualBox relies on the host system to classify USB devices as 1 or 2 (or 3?), and simply passes the classification through to the guest system.

Try plugging the device with and without VirtualBox running. Use the OS X "System Information" app to see whether OS X is identifying the device as USB 1 or USB 2.

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.