I just discovered an interesting little problem... on my RH 7.1 system
which I have configured to use devfs I've always had the problem that
I'd lose my mixer settings after the sound module got auto-unloaded
and later auto-loaded when something tried to play a sound. Now
RedHat has the following in modules.conf that's supposed to prevent
this:
post-install sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -L
pre-remove sound-slot-0 /bin/aumix-minimal -f /etc/.aumixrc -S
I finally spent some time investigating this and found that the
that aumix-minimal wants to open /dev/mixer, but /dev/mixer is
a symlink to /dev/sound/mixer which devfsd creates. Well, the
problem is that when the post-install command runs devfsd hasn't
had a chance to do this yet! It isn't just timing... inserting
a delay in the post-install command above doesn't help.
Apparently the event doesn't get sent to devfsd until after
all the post-install commands have run? Is that right, Richard?
Anyway, the simple solution is to explicitly tell aumix to use the
real devfs device name i.e.
post-install sound-slot-0 /bin/aumix-minimal -d /dev/sound/mixer -f
/etc/.aumixrc -L
This solution should work for most other cases where a post-install
command is needed since any program to do something with a device
should have an option for specifying the name. I thought I should
mention it on the list in case someone else gets bitten by this...
--jurgen
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