[arch-general] alsa start (Re: Fwd: udev events and /usr not mounted)
myra.nelson at hughes.net
Sun Nov 27 19:21:17 EST 2011
On Sun, Nov 27, 2011 at 13:06, clemens fischer <
ino-news at spotteswoode.dnsalias.org> wrote:
> Myra Nelson wrote:
> > Alsa is in my daemons array and starts. The problem is the udev
> > rule to restore the volume levels fails as it is run before /usr
> > is mounted. That's why I was asking about udev rules and why [
> > /usr/bin/alsactl restore ] works from the console after I've
> > booted. After reading through the initscripts, rc.d, and mkinitcpio
> > code I think it may be possible to run:
> > [
> > run_hook sysinit_postmount
> > udevam control --reload-rules
> > run_hook single_end
> > ]
> > in rc.local.
> The hooks don't work like this, rc.local might run too late.
> You'd make a file eg. /etc/rc.d/functions.d/my-hooks.sh:
> udevadm control --reload-rules ||
> echo "my_sysinit_postmount_udevadm: udevadm err $?"
> return 0
> add_hook sysinit_postmount my_sysinit_postmount_udevadm
> Putting the file into etc/rc.d/functions.d/ will let the hooks system
> see and source it, and add_hook() will put your function into the array
> of functions to run at a specific point. The list of hooks is in
> etc/rc.d/functions and a custom hook function is a regular shell
> function. No special error handling or sandboxing is done on them, so
> you want to make sure they don't block or kill the shell. This is why
> I'd recommend to use the "|| ..." clause after some user command and to
> return a zero at the end, though ATM neither seems strictly necessary.
> It will make a hook funtion future proof, I presume.
Thanks for the reply. I figured out the hook didn't work that way but it
didn't keep me from booting. Removing the run_hook around the udevadm
command and leaving it in rc.local takes care of the problem. It's only
necessary to restore the volume state stored in the asound file in /etc and
the udevadm command takes care of it. However I will take your response and
study the hooks and how to use them and learn something from this
Life's fun when your sick and psychotic!
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