Lee Revell wrote:
On Fri, 2006-04-07 at 16:58 -0400, Bill Allen wrote:
I'll try to do as you suggest. As I understand it (which could be not
at all) Dapper doesn't support realtime-lsm in any of those kernel
builds. It uses Rlimits-Aware PAM. I've added myself to the audio
group and as I mentioned, jack works great in 2.6.15-18, but in *-19,
and *-20 it's miserable.
OK that's a kernel bug of some kind - can you please report it to
Ubuntu? There should not be too many changes between those point
releases.
Lee
I found that if I increase the number of periods to 3 that the xruns on
startup don't happen. Thus, using:
/usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p512 -n3
I was able to bring up qsynth and attach vkeybd and play some notes no
problem. But, when I launched jack rack and loaded a rack with a couple
of the CAPS amp/cabinet simulation plugins, all hell broke loose. Even
with a buffersize of 2048 and 4 periods (-p2048 -n4), loading the rack
caused way too many hard xruns.
On 2.6.15-18-686, I'm running jack with:
/usr/bin/jackd -R -dalsa -dhw:0 -r44100 -p512 -n2
with no problems at all.
I'm trying to think of what could have regressed in the newer kernel
builds that would explain this behaviour?
Bill
