Avoid accessing /usr or /var during startup.

Neither /usr (where the alsactl binary is stored) nor /var (where mixer
settings are stored) are guaranteed to be available during the early phases
of system startup.  So udev shouldn't try to use them this early.  An init
script should be used instead to ensure that active sound cards are
initialized once those file systems are ready.

2011-09-25 Martin von Gagern

References:
https://bugs.gentoo.org/384375

Index: alsa-utils-1.0.24.2/alsactl/90-alsa-restore.rules
===================================================================
--- alsa-utils-1.0.24.2.orig/alsactl/90-alsa-restore.rules
+++ alsa-utils-1.0.24.2/alsactl/90-alsa-restore.rules
@@ -1,2 +1,3 @@
 ACTION=="add", SUBSYSTEM=="sound", KERNEL=="controlC*", KERNELS=="card*", \
+        ENV{STARTUP}!="1", \
         RUN+="/usr/sbin/alsactl restore $attr{number}"