8 Apr
2007
8 Apr
'07
12:03 a.m.
Paul Davis wrote:
On Thu, 2007-04-05 at 02:00 -0400, Spencer Russell
wrote:
>
> What could cause clicks without xruns? I'm baffled.
PCI bus hogging, for one thing. consider running a
script like this
during system startup (mine is in /etc/rc.d/init.d/pcilatency). yours
would need adjusting to reflect the PCI IDs of the actual interfaces you
have installed.
#!/bin/sh
case $1 in
start)
# "open up" the PCI bus by allowing fairly long bursts for
all devices, increasing performance
setpci -v -s "*:*.*" latency_timer=b0
# maximise latency for RME Hammerfall, thus
allowing
# more data per PCI transfer and minimizing xfuns
setpci -v -s 01:04.0 latency_timer=ff
# ditto for the onboard AC97 audio interface
setpci -v -s 00:07.5 latency_timer=ff
esac
Here one that works automatically for all multimedia devices:
# find multimedia devices
pcis=$(lspci -v | grep Multimedia | awk '{ print $1; }')
if test -z "$pcis"; then
echo WARNING: no multimedia devices found on pci bus
else
for p in $pcis; do
echo set maximum latency timer for $p
setpci -s $p latency_timer=ff
done
fi
HTH