restart sound daemon

Symptoms: No sound after reboot.

MPlayer complains:
AO: [pulse] Init failed: Connection refused
Failed to initialize audio driver 'pulse'
[AO_ALSA] alsa-lib: pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Connection refused




Solution:
(diagnose)



 cat /proc/asound/cards

(as root)
alsactl restore 0

(as user)
pulseaudio -k
pulseaudio -D

Thanks to: this link (scroll down to "research part 2")

Linux and Apple keyboard

How to swap the “fn” use of Function keys on an Apple Keyboard in Linux

Fn keys:

Thanks to this link: see

issue command:

echo 2 > /sys/module/hid_apple/parameters/fnmode

(0: disabled, 1: enabled, 2: F1-F12)

For permanent solution cf. the link above.