[Spice-devel] error: No free USB channel

[Frediano Ziglio]

Il giorno gio 23 dic 2021 alle ore 23:38 i iordanov <iiordanov at gmail.com>
ha scritto:

> Hi guys,
>
> During my testing I've been unable to connect more than 2 USB devices
> at a time - could you please help me figure out why that's happening?
>
> The backend starts returning error with message "No free USB channel",
> but I can't see how to tune the number of USB channels available!
>
> 2021-12-23 15:27:52.608 29721-29760/com.iiordanov.aSPICE
> D/android-service: connect_cb: start
> 2021-12-23 15:27:52.608 29721-29760/com.iiordanov.aSPICE
> I/android-service: connect_cb: successfully redirected device
> 2021-12-23 15:28:00.499 29721-29760/com.iiordanov.aSPICE
> D/android-service: connect_cb: start
> 2021-12-23 15:28:00.499 29721-29760/com.iiordanov.aSPICE
> I/android-service: connect_cb: successfully redirected device
> 2021-12-23 15:28:03.582 29721-29760/com.iiordanov.aSPICE
> D/android-service: connect_cb: start
> 2021-12-23 15:28:03.582 29721-29760/com.iiordanov.aSPICE
> E/android-service: connect_cb: failed to redirect device, error: No
> free USB channel
> 2021-12-23 15:28:06.385 29721-29760/com.iiordanov.aSPICE
> D/android-service: connect_cb: start
> 2021-12-23 15:28:06.385 29721-29760/com.iiordanov.aSPICE
> E/android-service: connect_cb: failed to redirect device, error: No
> free USB channel
> 2021-12-23 15:28:08.634 29721-29760/com.iiordanov.aSPICE
> D/android-service: connect_cb: start
> 2021-12-23 15:28:08.634 29721-29760/com.iiordanov.aSPICE
> E/android-service: connect_cb: failed to redirect device, error: No
> free USB channel
>
> Your help is very appreciated.
>
> Thanks!
> iordan
>
>
Hi,
  this is expected. Every USB channel allow to attach one USB device. Is
like having 2 physical USB ports on your computer. If you don't use an HUB
you can attach only 2 USB physical devices. Currently there's no software
USB hub so one USB device takes one USB channel and by default only 2 USB
channels are attached to the VM.

Frediano
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/spice-devel/attachments/20211224/be68ddec/attachment.htm>