[Pkg-acpi-devel] Bug#858508: acpi-support: Hardware "mute" and volume buttons on Thinkpad X220 no longer take effect

[Paul "LeoNerd" Evans]

Package: acpi-support
Version: 0.142-8
Severity: normal

The hardware "mute", "volume up" and "volume down" buttons on my X220
used to correctly adjust the sound volume. Now they do nothing at all.

I wonder if this is because the events generated no longer match the
patterns defined in the config files; for instance the "mute" button
generates:

  $ socat /var/run/acpid.socket -
  button/mute MUTE 00000080 00000000 K

whereas the file says:

  $ cat /etc/acpi/events/thinkpad-mute 
  # Volume Always Mute
  event=ibm/hotkey HKEY 00000080 00001017

Similar observations can be made about the volume up and down keys.


-- System Information:
Debian Release: 9.0
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages acpi-support depends on:
ii  acpi-support-base  0.142-8
ii  acpid              1:2.0.28-1
ii  lsb-base           9.20161125
ii  pm-utils           1.4.1-17
ii  x11-xserver-utils  7.7+7

Versions of packages acpi-support recommends:
ii  acpi-fakekey  0.142-8
ii  rfkill        0.5-1

Versions of packages acpi-support suggests:
ii  radeontool    1.6.3-1
ii  vbetool       1.1-4
ii  xinput        1.6.2-1
ii  xscreensaver  5.36-1

-- Configuration Files:
/etc/acpi/events/lidbtn changed [not included]

-- no debconf information