[ovirt-users] Fwd: Can't add/remove usb device to VM

[Arik Hadas]

On Mon, Feb 12, 2018 at 6:57 PM, Jon bae <jonbae77 at gmail.com> wrote:

> A little update:
> I found out that I have to activate *Hostdev Passthrough* (is this really
> necessary for USB devices?). Now I see all the devices and I can add also
> an USB device.
>

Theoretically, no, it is not needed.
Practically, it is needed in previous versions of 4.2 due to a bug that
would be solved in the upcoming version of 4.2 [1].


> But I'm still not able to disconnect the USB from the old VM.
>

Yep, that's another bug that would be solved in the upcoming version of 4.2
[2].

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1548344
[2] https://bugzilla.redhat.com/show_bug.cgi?id=1557777


>
> ---------- Forwarded message ----------
> From: Jon bae <jonbae77 at gmail.com>
> Date: 2018-02-12 16:14 GMT+01:00
> Subject: Can't add/remove usb device to VM
> To: users <users at ovirt.org>
>
>
> Hello,
> I run oVirt 4.2.1, in 4.1 I added a USB device to a VM and now I wanted to
> change this device to a different VM.
> But I found out, that I'm not able to remove this device nor I'm able to
> add any device to any VM. The device list is empty.
>
> I found a bug report, what describe this error:
> https://bugzilla.redhat.com/show_bug.cgi?id=1531847
>
> Is there a solution for that?
>
> The USB device is a hardware dongle and it is very impotent for us to
> change this.
>

> Any workaround is welcome!
>

If you can't wait for the upcoming version of 4.2 you can try removing it
manually by manipulating the database (assuming there is only one host
device attached to the VM):

(1) delete from vm_device where vm_id in (select vm_guid from vm_static
where vm_name='<vm name>') and type='hostdev';
(2) update host_device set vm_id = NULL where vm_id in (select vm_guid from
vm_static where vm_name='<vm name>');


>
> Regards
>
> Jonathan
>
>
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>
>
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