Re: [LAU] suspending with realtime kernel

Geoff King wrote:
>> I've been having a problem which isn't directly to do with audio—it's to
>> do with the Ubuntu realtime kernel—but I haven't got any answers from
>> the Ubuntu forums and this is a real showstopper as far as doing audio
>> work goes.
>
> I've tried the ubuntu realtime kernel several times. I'm not suprised by your
> findings. Check out these links. I would suggest you file a bug report to
> ubuntu launchpad.
>
> https://launchpad.net/ubuntu/+source/linux-rt/+bugs
> https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/138691
>
> In my experience you can get a good rt system from ubuntu if you do some major
> tweaking, but then you might not like the desktop as much. If you could use a
> basic desktop system with no wireless that would help you figure this out.
>
> I remember playing with lots of changes such as removing NetworkManager,
> tracker, acpid, apmd, adding rtirq, and making changes to other system settings.
> But that was a long time ago now.

It depends on your hardware; but both 2.6.24.3-rt3 and 2.6.29.1-rt7
suspend and resume just fine with NetworkManager, avahi-daemon and acpid
running. - This is a debian/squeeze on a Thinkpad.

> Now since I don't really need realtime, I just use the generic kernel or one I
> compile from Ubuntu sources so that I can use rosegarden midi (1000HZ timer and
> low-latency desktop I think are the only changes). I have no real need for
> realtime.
>
> Do you really need -rt for your work?
>
> Good Luck. Geoff

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Received on Fri Apr 17 16:15:02 2009