Xen users - Jun 2007 - Setting enviroment variables for qemu, when calling xm for a hvm guest

Hi all,

I have a working xen setup (3.0.4 hypervisor, 2.6.18 debian kernel),
which I can create my hvm hosts with no problem at all ...

But I decided do enable soundcard support .. and enabling the
soundhw=''es1370'' config I have a soundcard listed ... but (at
least in
my debian box) it uses the OSS emulation (yes, I have alsa modules, and
it loads the ALSA oss emulation) .. and that locks the sound device once
the hvm guest is running :( .

In QEmu docs, there''s an option, by running "export
QEMU_AUDIO_DRV=alsa"
should switch it''s driver to use alsa instead of OSS ... but .. how can
this be done on Xen ? How can I set enviroment variables to qemu
backend ? :( ..

Thanks,

Theo Diem



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> -----Original Message-----
> From: xen-users-bounces@lists.xensource.com 
> [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of 
> Theo Cabrerizo Diem
> Sent: 29 June 2007 17:46
> To: xen-users@lists.xensource.com
> Subject: [Xen-users] Setting enviroment variables for qemu, 
> when calling xm for a hvm guest
> 
> Hi all,
> 
> I have a working xen setup (3.0.4 hypervisor, 2.6.18 debian kernel),
> which I can create my hvm hosts with no problem at all ...
> 
> But I decided do enable soundcard support .. and enabling the
> soundhw=''es1370'' config I have a soundcard listed ... but
(at least in
> my debian box) it uses the OSS emulation (yes, I have alsa 
> modules, and
> it loads the ALSA oss emulation) .. and that locks the sound 
> device once
> the hvm guest is running :( .
> 
> In QEmu docs, there''s an option, by running "export 
> QEMU_AUDIO_DRV=alsa"
> should switch it''s driver to use alsa instead of OSS ... but 
> .. how can
> this be done on Xen ? How can I set enviroment variables to qemu
> backend ? :( ..
You can replace the qemu-dm module with a script that calls qemu-dm.
There is a "qemu-dm.debug" next to qemu-dm that demonstrates how this
can be done. So in simple terms, take the qemu-dm.debug (you may need to
point it at the right /usr/lib or /usr/lib64 depending on architecture,
unless someone has fixed that lately) - either way, modify it to have
the "export" line in it, and if you feel like that, remove the dump of
the command-line args. 

--
Mats
> 
> Thanks,
> 
> Theo Diem
> 
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
> 
> 
> 


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