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Note: pbbuttons with IPC problems


I've had a very strange problem. gtkpbbuttons and pbbcmd report

$ LANG=C pbbcmd query SLEEPKEY
ERROR: Problems with IPC, maybe server is not running.
$ LANG=C gtkpbbuttons -a /dev/sound/dsp 
ERROR: Can't create message port for client.

The cause was, there were not enough IPC channels. A simple

echo 32 > /proc/sys/kernel/msgmni

helped. An entry in /etc/sysctl.conf is for permanence.

Hope this information helps someone sometime.


Computer Science is no more about Computers than astronomy is about 
         -- Edsger Wybe Dijkstra

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