Re: -parallel supported?

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On Mon, Sep 22, 2008 at 05:57:15PM -0400, Bob Tennent wrote:
>  >|> qemu-kvm has a -parallel option for attaching a parallel port to a
>  >|> guest. Does virt-manager support this? I'm running version
>  >|> 0.5.3-2.fc8.
>  >|
>  >|virt-manager currently does not have support for adding
>  >|parallel devices to guests, though this is supported at
>  >|the libvirt level. So, using virsh, you can add a parallel
>  >|device to an existing VM. Check out
>  >|http://libvirt.org/formatdomain.html#elementsConsole for
>  >|xml examples.
> 
> Thanks.  I added
> 
>     <parallel type='pty'>
>       <source path='/dev/lp0' />
>       <target port='0'/>
>     </parallel>
> 
> to the <devices> section of the relevant file in /etc/libvirt/qemu. The
> parallel "hardware" shows up in virt-manager, but with - as the source
> path; running the domain yields

>   libvirtError: internal error Timed out while reading console startup
>   output
> 
> Same result if I use <source path='/dev/pts/2' />. If I remove the
> parallel "hardware" in the virt-manager, the guest starts up OK.

Your XML syntax is wrong. You specified a 'pty' but then gave it a
real path which doesn't make sense. You want type='dev' instead,
and the <target> element is redundant - that's an output only
element at this time. So, eg

     <parallel type='dev'>
       <source path='/dev/lp0' />
     </parallel>

Daniel
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