Hi Hermann,
on my machine issues started with kernels > 3.8.13-rt14. They locked my
machine. After a while newer versions of linux-rt worked again, but I
didn't used them much for audio work, so I don't know how good they work.
E.g. 3.10.61-rt65 does work (available as linux-rt-lts from Arch Audio),
3.14.28-rt25 does work (available as linux-rt from Arch Audio), but at
least CPU frequency scaling is broken for 3.14.28-rt25 and it was the same
for 3.14.25-rt22. It's impossible to change the governor, so if you for
some reason would like to use ondemand instead of performance, it doesn't
work. IOW my experiences were good for IIRC <= 3.8.13-rt14 and nowadays I
would test 3.10.61-rt65 and/or 3.14.28-rt25 for audio work. I only would
downgrade to 3.8.13-rt14 if I would experience issues. At the moment I'm
using 3.10.61-rt65 for averaged desktop usage, because it can be used with
frequency scaling ondemand and I can build vbox modules for the last
really stable version of vbox. IIRC >= 3.16 only build modules for broken
versions of vbox, IOW for vbox > 4.3.12, but this version is the last
version with completely good USB support. IOW 3.18.2-2-ARCH is useless for
my needs when I want to run vbox, but it works for anything else. However,
even with threadirqs I never used it for audio work either. The issues
with kernels > 3.8.13-rt14 happened for AMD machines, I wasn't the only
user experiencing issues. Mobo ASUS M2A-VM HDMI, CPU Athlon dual-core
BE-2350 (2.1 GHz), RAM 4 GiB, audio card RME HDSPe AIO (can't be used
without getting xruns), 2 cards for MIDI are TerraTec EWX 24/96.
Resume: IIRC <= 3.8.13-rt14 were ok (on Ubuntu and Debian installs too)
and 3.10.61-rt65 likely is ok too, but not really tested on my machine.
Regards,
Ralf
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