** Also affects: vmware-server (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
On Gutsy 64-bit using qemu/kvm (also VirtualBox and, I believe, VMWare)
and the "-usb" switch no USB devices are available since qemu/kvm looks
for the description of them in the 'devices' file of a usbfs mount at
/proc/bus/usb/
but the code previously providing the usbfs mount that is created at
start-up via /etc/rcS/S11mountdevsubfs.sh -->
/etc/init.d/mountdevsubfs.sh was commented out. The USB devices are now
reported at
/dev/bus/usb/
but currently there is no usbfs file-system mounted/linked there to
provide the 'devices' text-file.
qemu/kvm reports:
qemuctl -qemu vdeq kvm -boot c -m 512 -hda /home/all/VirtualMachines
/WindowsXP-SP2.ovl -net nic,vlan=0 -soundhw es1370 -usb -net vde
info usbhost
Could not open /proc/bus/usb/devices
$ ls -l /proc/bus/usb
total 0
+
+
+ WORKAROUND:
+ To re-enable it edit the file '/etc/init.d/mountdevsubfs.sh' and uncomment
the code after line 40 so it reads:
+ # Magic to make /proc/bus/usb work
+ #
+ mkdir -p /dev/bus/usb/.usbfs
+ domount usbfs "" /dev/bus/usb/.usbfs
-obusmode=0700,devmode=0600,listmode=0644
+ ln -s .usbfs/devices /dev/bus/usb/devices
+ mount --rbind /dev/bus/usb /proc/bus/usb
+ Execute the script manually to enable the change before a system reboot:
+ $ sudo /etc/init.d/mountdevsubfs.sh start
--
Could not open /proc/bus/usb/devices
https://bugs.launchpad.net/bugs/156085
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