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