The 90-alsa-restore.rules udev rule is primarily meant to handle hotplugging,
but sometimes it is also run before /usr is mounted,
and alsactl restore depends on /usr/share/alsa being present.

If /usr/share/alsa is not present, we're so early in the boot
process that alsa-restore.service (or upstart equivalent) will
run later on.

BugLink: https://bugs.launchpad.net/bugs/1289730
Signed-off-by: David Henningsson <david.hennings...@canonical.com>
---

I'm not really sure of all quirks in the boot process, and I haven't tested the
patch either, hence the RFC above. Do you think it makes sense? Should we also
add @sbindir@ to the things to test for?

 alsactl/90-alsa-restore.rules.in | 2 +-
 alsactl/Makefile.am              | 1 +
 configure.ac                     | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/alsactl/90-alsa-restore.rules.in b/alsactl/90-alsa-restore.rules.in
index c68119d..c83c6b5 100644
--- a/alsactl/90-alsa-restore.rules.in
+++ b/alsactl/90-alsa-restore.rules.in
@@ -1,4 +1,4 @@
-ACTION=="add", SUBSYSTEM=="sound", KERNEL=="controlC*", KERNELS!="card*", 
GOTO="alsa_restore_go"
+ACTION=="add", SUBSYSTEM=="sound", KERNEL=="controlC*", KERNELS!="card*", 
TEST=="@datadir@", GOTO="alsa_restore_go"
 GOTO="alsa_restore_end"
 
 LABEL="alsa_restore_go"
diff --git a/alsactl/Makefile.am b/alsactl/Makefile.am
index b862412..afbedb3 100644
--- a/alsactl/Makefile.am
+++ b/alsactl/Makefile.am
@@ -44,6 +44,7 @@ endif
 
 edit = \
        $(SED) -r -e 's,@sbindir\@,$(sbindir),g' \
+                 -e 's,@datadir\@,$(mydatadir),g' \
                  -e 's,@daemonswitch\@,$(ALSACTL_DAEMONSWITCH),g' \
                                                        < $< > $@ || rm $@
 
diff --git a/configure.ac b/configure.ac
index 7e6894a..a4d2db3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -292,6 +292,7 @@ AC_DEFINE_UNQUOTED(SOUNDSDIR, "$soundsdir", [directory 
containing sample data])
 
 mydatadir="$dir/alsa"
 AC_DEFINE_UNQUOTED(DATADIR, "$mydatadir", [directory containing alsa 
configuration])
+AC_SUBST(mydatadir)
 
 AC_ARG_WITH(testsound,
   AS_HELP_STRING([--with-testsound=file], [give the path of test sound file 
for alsaconf]),
-- 
1.9.1

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https://bugs.launchpad.net/bugs/1289730

Title:
  systemd-udev fails to execute alsactl during start-up if /usr and/or
  /var are separate volumes

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