On Sun, November 26, 2017 15:13, evo wrote: > > > Am 26.11.2017 um 16:10 schrieb Unman: >> On Sun, Nov 26, 2017 at 01:04:39PM +0100, evo wrote:
>>> Hey! Thanks! >>> i installed qubes-usb-proxy on the webcam-VM and tried to attach it >>> there, but i get this error: "device attach failed: Invalid speed >>> received" >>> >>> find nothing about such error in the docs. >> >> Which Qubes version are you using? >> >> What's the device you are trying to use? >> Can you provde more information? >> >> This is an error that has been reported before and there's an open >> ticket on qubes issues. >> It seems to be device and circumstance dependent. (e.g an android in >> debug mode throws this error but the same device NOT in debug mode >> attaches properly.) >> > > > i use qubes 3.2 > and i try to use logitech hd C920 webcam > > i found some postings to such kind of error, yes... and it seems to be a > bug, isn't it? > > So there is no chance to solve it? Might be fixed in 4.0 or a future version, but as a temporary workaround for problem USB devices like that you can assign an entire USB controller to your webcam-VM. It's not as nice because you lose isolation for that controller but it should work. If you want to try it, unplug all unnecessary USB devices. Shutdown both webcam-VM and sys-usb. Look in sys-usb device list for a USB controller, note the number, remove from selected list. Add it to webcam-VM Devices, and uncheck Include in memory balancing in Advanced. You might also need to up the initial memory while you are in here, try 1024 MB. Start webcam-VM. Each USB controller only handles some of the USB ports, so it might be trial and error to find one that handles the empty port you are plugging the webcam into. Once you figure out which USB port or ports are now assigned to the webcam-VM, try to avoid plugging anything else into them besides the webcam. -- You received this message because you are subscribed to the Google Groups "qubes-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to qubes-users+unsubscr...@googlegroups.com. To post to this group, send email to qubes-users@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/f332a8378521c1a0587a52c1b35ef33f%40elude.in. For more options, visit https://groups.google.com/d/optout.
