Re: [LAU] Re: Pops and clicks but no xruns

Andrew Burgess <aab@email-addr-hidden>:
> Paul Davis wrote:
> >> What could cause clicks without xruns? I'm baffled.
> >PCI bus hogging, for one thing. consider running a script like this
...
> 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

It does not work for me:

  $ lspci | grep Multi | head -1 | cut -b-75
  0000:00:05.0 Multimedia audio controller: nVidia Corporation nForce MultiMe
  $ setpci -s 0000:00:05.0 latency_timer
  lspci: -s: Invalid slot number
  $ setpci -s 00:05.0 latency_timer
  00

I have to remove the first 0000: from lspci, as in:

  $ cat /usr/local/sbin/pci.set.audio
  #!/bin/sh

  val=${1:-ff}
  # find multimedia devices
  pcis=$( lspci -n | grep ' 0401: ' | cut -f1 -d\ | cut -f2- -d: )
  if test -z "$pcis"; then
    echo WARNING: no multimedia devices found on pci bus
  else
    for p in $pcis; do
      lspci -s $p
      echo -en \\tmaximum latency timer:\
      setpci -s $p latency_timer | tr -s ' \n' ' '
      setpci -s $p latency_timer=$val > /dev/null
      echo -n '-> '
      setpci -s $p latency_timer
    done
  fi
  $

Though all devices does not change:

  # pci.set.audio | cut -b-68
  0000:00:05.0 Multimedia audio controller: nVidia Corporation nForce
          maximum latency timer: 00 -> 00
  0000:00:06.0 Multimedia audio controller: nVidia Corporation nForce2
          maximum latency timer: 00 -> 00
  0000:01:09.0 Multimedia audio controller: VIA Technologies Inc. ICE1
          maximum latency timer: 00 -> f8
  #

Regards,
/Karl

-----------------------------------------------------------------------
Karl Hammar Aspö Data karl@email-addr-hidden
Lilla Aspö 2340 Networks
S-742 94 Östhammar +46 173 140 57 Computers
Sweden +46 70 511 97 84 Consulting
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Received on Sun Apr 8 16:15:02 2007