Ubuntu
qemu-kvm package

usb_add not working in qemu monitor

Bug #576086 reported by Siegward Jäkel on 2010-05-05

This bug affects 2 people

Affects		Status	Importance	Assigned to	Milestone
	qemu-kvm (Ubuntu)	Invalid	Low	Unassigned

Bug Description

Binary package hint: kvm

usb_add in qemu monitor shows the following error messages:

usb_add host:03eb:6124
husb: using sys file-system with /dev/bus/usb
husb: could not open /sys/bus/usb/devices/1-1/product
husb: could not open /sys/bus/usb/devices/2-1/product
husb: could not open /sys/bus/usb/devices/1-1.6/product
husb: could not open /sys/bus/usb/devices/2-1.2/product

This path is obviously wrong, the correct path should be:
/sys/bus/usb/devices/1-1/IdProduct

Revision history for this message

Siegward Jäkel (sj) wrote on 2010-05-05:

apport.kvm.rf6RBY.apport Edit (3.9 KiB, text/plain)

Chuck Short (zulcss) on 2010-05-17

affects:

kvm (Ubuntu) → qemu-kvm (Ubuntu)

Revision history for this message

Mathias Gug (mathiaz) wrote on 2010-05-18:

Could you add to this bug the information mentioned in https://wiki.ubuntu.com/DebuggingKVM ?

Changed in qemu-kvm (Ubuntu):
status:	New → Incomplete
importance:	Undecided → Medium
importance:	Medium → Low

Revision history for this message

Mathias Gug (mathiaz) wrote on 2010-05-18:

Could you also outline what you're trying to achieve? How do you create the error?

Revision history for this message

Serge Hallyn (serge-hallyn) wrote on 2010-09-13:

Hi,

The problem actually is that you need to add '-usb' to your kvm command line. If you
do 'info usb', you'll see 'USB support not enabled'.

Without the '-usb' command line option, I get the same results as you do. With the '-usb'
option, I get permission denied. Finally, running that as root, it succeeds for me.