> Date: Wednesday, June 15, 2016 19:59:09 -0700
> From: John R Pierce <pierce@xxxxxxxxxxxx>
>
> running centos 6... have had a KVM linux vm (also C6) going for
> quite awhile that depends on a USB device mapping (a external audio
> DAC module).
>
> I updated the host today (yum update), it had been awhile (was like
> 6.5 before, now its 6.8+), and rebooted. the VM won't restart.
>
> when I try and restart it, I get this
>
> Error restoring domain: internal error Did not find USB device
> 8bb:2704 bus:5 device:4
>
> libvirtError: internal error Did not find USB device 8bb:2704 bus:5
> device:4
>
>
> using virsh edit mydomain, I see...
>
> <hostdev mode='subsystem' type='usb' managed='yes'>
> <source>
> <vendor id='0x08bb'/>
> <product id='0x2704'/>
> </source>
> </hostdev>
>
> and on the host, lsusb shows...
>
># lsusb
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 005 Device 002: ID 08bb:2704 Texas Instruments Audio Codec
>
>
> note the TI Audio device is bus 5, dev 2. Why is KVM insisting
> its bus 5 dev 4? I've deleted the device from the VM and tried to
> start it, same error. i've looked in every kvm/qemu related conf
> file I can find, no sign of bus 5 dev 4.
>
># virsh start mydomain
> error: Failed to start domain mydomain
> error: internal error Did not find USB device 8bb:2704 bus:5
> device:4
>
>
> how can I fix this?
Have you tried a "virsh detach-device ..." and then the corresponding
[re-]attach (or maybe even just a new "attach" first)?
When my guest complains about the USB not being there I can generally
make things work with:
virsh attach-device <guest> --file usb_device.xml --current
where the "usb_device.xml" file has the six lines you included above
from your "virsh edit". Since your guest isn't running I think you'd
have to use "--config", rather than "--current" on that line.
It's not obvious that that will clear up your assignment problem, but
it might be worth a shot.
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