I'm trying to use a C920 USB camera on a Thinkpad X1 Carbon 6gen, latest Qubes4. The VM is running debian-9, but i also tried fedora-26. I tried both connecting the camera directly to a USB port of the Thinkpad and via a powered USB hub.
I attach it to my VM: user@browser $ lsusb Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 012: ID 046d:082d Logitech, Inc. HD Pro Webcam C920 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub user@browser $ ll /dev/video0 crw-rw----+ 1 root video 81, 0 Oct 30 13:30 /dev/video0 user@browser $ cheese (cheese:3812): Gtk-WARNING **: Theme parsing error: cheese.css:7:35: The style property GtkScrollbar:min-slider-length is deprecated and shouldn't be used anymore. It will be removed in a future version (cheese:3812): GStreamer-CRITICAL **: gst_element_message_full_with_details: assertion 'GST_IS_ELEMENT (element)' failed ** Message: cheese-application.vala:211: Error during camera setup: No device found (cheese:3812): cheese-CRITICAL **: cheese_camera_device_get_name: assertion 'CHEESE_IS_CAMERA_DEVICE (device)' failed (cheese:3812): GLib-CRITICAL **: g_variant_new_string: assertion 'string != NULL' failed (cheese:3812): GLib-GIO-CRITICAL **: g_settings_schema_key_type_check: assertion 'value != NULL' failed (cheese:3812): GLib-CRITICAL **: g_variant_get_type_string: assertion 'value != NULL' failed (cheese:3812): GLib-GIO-CRITICAL **: g_settings_set_value: key 'camera' in 'org.gnome.Cheese' expects type 's', but a GVariant of type '(null)' was given ** (cheese:3812): CRITICAL **: cheese_preferences_dialog_setup_resolutions_for_device: assertion 'device != NULL' failed ^C user@browser $ lsusb Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub user@browser $ ll /dev/video0 ls: cannot access '/dev/video0': No such file or directory user@browser $ sudo dmesg [...] [ 1067.111409] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? [ 1067.999310] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? [ 1068.887291] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? [ 1069.775325] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? [ 1069.776403] usb 1-1: USB disconnect, device number 12 [ 1070.671126] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? [ 1071.559252] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? [ 1071.559340] usb usb1-port1: attempt power cycle [ 1072.759348] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? [ 1073.647189] usb usb1-port1: Cannot enable. Maybe the USB cable is bad? [ 1073.647296] usb usb1-port1: unable to enumerate USB device Qubes shows the device as still being attached to the VM. I can detach and reattach without problems. Forwarding the Thinkpad's internal camera works fine. Are failures with particular USB devices to be expected? Does anyone know a good external webcam that works? -- 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 [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/qubes-users/6bfdfc43-c636-4547-8ecb-b5438e835158%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
