Public bug reported:

This error is logged :
systemd-udevd[409]: Process '/usr/sbin/alsactl -E HOME=/run/alsa restore 1' 
failed with exit code 99

note: sound works as expected when the GS session is opened; so maybe a
boot race.

but from a terminal, an other error is found:
/usr/sbin/alsactl: sysfs_init:48: sysfs path '/sys' is invalid


Details:

oem@u64:~$ which alsactl
/usr/sbin/alsactl
oem@u64:~$ df -h /usr/sbin/alsactl
Filesystem      Size  Used Avail Use% Mounted on
/dev/sdb4        18G   11G  6.5G  62% /
oem@u64:~$ df -h /run/alsa
Filesystem      Size  Used Avail Use% Mounted on
tmpfs           396M   12M  385M   3% /run

(/run/alsa does not exist but /run/alsa/ which is an empty subdir)


oem@u64:~$ /usr/sbin/alsactl restore
/usr/sbin/alsactl: state_lock:125: file /var/lib/alsa/asound.state lock error: 
File exists
/usr/sbin/alsactl: load_state:1683: Cannot open /var/lib/alsa/asound.state for 
reading: File exists
/usr/sbin/alsactl: sysfs_init:48: sysfs path '/sys' is invalid

Found hardware: "HDA-Intel" "Realtek ALC882" "HDA:10ec0882,1043e601,00100101" 
"0x1043" "0x81d8"
Hardware is initialized using a generic method
/usr/sbin/alsactl: sysfs_init:48: sysfs path '/sys' is invalid

note: that command works: volume is set back to 50% from 100% initialy

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: alsa-utils 1.1.2-1ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-10.11-generic 4.8.0-rc6
Uname: Linux 4.8.0-10-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.3-0ubuntu7
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Sep 16 16:31:17 2016
SourcePackage: alsa-utils
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: alsa-utils (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug yakkety

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https://bugs.launchpad.net/bugs/1624435

Title:
  systemd-udevd[409]: Process '/usr/sbin/alsactl -E HOME=/run/alsa
  restore 1' failed with exit code 99

Status in alsa-utils package in Ubuntu:
  New

Bug description:
  This error is logged :
  systemd-udevd[409]: Process '/usr/sbin/alsactl -E HOME=/run/alsa restore 1' 
failed with exit code 99

  note: sound works as expected when the GS session is opened; so maybe
  a boot race.

  but from a terminal, an other error is found:
  /usr/sbin/alsactl: sysfs_init:48: sysfs path '/sys' is invalid

  
  Details:

  oem@u64:~$ which alsactl
  /usr/sbin/alsactl
  oem@u64:~$ df -h /usr/sbin/alsactl
  Filesystem      Size  Used Avail Use% Mounted on
  /dev/sdb4        18G   11G  6.5G  62% /
  oem@u64:~$ df -h /run/alsa
  Filesystem      Size  Used Avail Use% Mounted on
  tmpfs           396M   12M  385M   3% /run

  (/run/alsa does not exist but /run/alsa/ which is an empty subdir)

  
  oem@u64:~$ /usr/sbin/alsactl restore
  /usr/sbin/alsactl: state_lock:125: file /var/lib/alsa/asound.state lock 
error: File exists
  /usr/sbin/alsactl: load_state:1683: Cannot open /var/lib/alsa/asound.state 
for reading: File exists
  /usr/sbin/alsactl: sysfs_init:48: sysfs path '/sys' is invalid

  Found hardware: "HDA-Intel" "Realtek ALC882" "HDA:10ec0882,1043e601,00100101" 
"0x1043" "0x81d8"
  Hardware is initialized using a generic method
  /usr/sbin/alsactl: sysfs_init:48: sysfs path '/sys' is invalid

  note: that command works: volume is set back to 50% from 100% initialy

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: alsa-utils 1.1.2-1ubuntu1
  ProcVersionSignature: Ubuntu 4.8.0-10.11-generic 4.8.0-rc6
  Uname: Linux 4.8.0-10-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Fri Sep 16 16:31:17 2016
  SourcePackage: alsa-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

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