Arch Teapot Notes 12-02-18: Difference between revisions

Latest revision as of 13:33, 20 February 2012

Multimedia Keys[edit | edit source]

We learned that multimedia keys are available by using xev. To use it, start xev | grep keycode and press the buttons in question.

Notice: if your window manager evaluates the pressed keycodes, nothing will show up.

The shown keycodes should be placed in ~/.Xmodmap and loaded on X startup by xmodmap ~/.Xmodmap.

Example (ThinkPad X61):

keycode 113 = XF86AudioMute
keycode 114 = XF86AudioLowerVolume
keycode 115 = XF86AudioRaiseVolume
keycode 148 = XF86Launch1 # ThinkVantage Button
keycode 163 = XF86AudioNext
keycode 164 = XF86AudioPlay
keycode 165 = XF86AudioPrev
keycode 166 = XF86AudioStop

The terminal based program showkeys won’t work, since kernel keycodes differ from X11.

ArchWiki Xmodmap

These keysyms can be used for your favorite window manager‘s configuration.

Example (awesome):

  -- Multimedia Keys
    awful.key({ }, "XF86AudioRaiseVolume", function () awful.util.spawn('mpc -h localhost volume +1') end),
    awful.key({ }, "XF86AudioLowerVolume", function () awful.util.spawn('mpc -h localhost volume -1') end),
    awful.key({ }, "XF86AudioMute", function () awful.util.spawn('mpc -h localhost volume 0') end),
    awful.key({ }, "XF86AudioNext", function () awful.util.spawn('mpc -h localhost next') end),
    awful.key({ }, "XF86AudioPrev", function () awful.util.spawn('mpc -h localhost prev') end),
    awful.key({ }, "XF86AudioPlay", function () awful.util.spawn('mpc -h localhost toggle') end)

PulseAudio[edit | edit source]

PulseAudio is a sound system enabling us to control application volumes individually and use other computers soundcards over the network.

Recommended packages:

pulseaudio (the daemon, required)
pavucontrol (GTK based mixer application)
paprefs (GTK based configuration tool)
pulseaudio-alsa

With pulseaudio-alsa, applications may use a virtual ALSA device for output. They show up as regular PulseAudio clients and there is an ALSA mixer channel to control the volume.

Note: in order to discover remote soundcards, one has to start avahi-daemon!

@@ Line 1: / Line 1: @@
 == Multimedia Keys ==
-We learned that multimedia keys are available by using ''showkey''. To use it, one has to go to a text terminal, start ''showkey'' and press the buttons in question.
+We learned that multimedia keys are available by using <tt>xev</tt>. To use it, start <tt>xev | grep keycode</tt> and press the buttons in question.
-The shown keycodes should be placed in <tt>~/.Xmodmap</tt>
+Notice: ''if your window manager evaluates the pressed keycodes, nothing will show up.''
-<source lang="xorg_conf">
-keycode 234 = XF86Back
+The shown keycodes should be placed in <tt>~/.Xmodmap</tt> and loaded on X startup by <tt>xmodmap ~/.Xmodmap</tt>.
-keycode 233 = XF86Forwardpre
-keycode 144 = XF86AudioPrev
+Example (ThinkPad X61):
-keycode 164 = XF86AudioStop
+<source lang="lua">
-keycode 162 = XF86AudioPlay
+keycode 113 = XF86AudioMute
-keycode 153 = XF86AudioNext
+keycode 114 = XF86AudioLowerVolume
-keycode 160 = XF86AudioMute
+keycode 115 = XF86AudioRaiseVolume
-keycode 174 = XF86AudioLowerVolume
+keycode 148 = XF86Launch1 # ThinkVantage Button
-keycode 176 = XF86AudioRaiseVolume
+keycode 163 = XF86AudioNext
+keycode 164 = XF86AudioPlay
+keycode 165 = XF86AudioPrev
+keycode 166 = XF86AudioStop
+</source>
+The terminal based program ''showkeys'' won’t work, since kernel keycodes differ from X11.
+ArchWiki [https://wiki.archlinux.org/index.php/Xmodmap Xmodmap]
+These keysyms can be used for your favorite window manager‘s configuration.
+Example (awesome):
+<source lang="lua">
+  -- Multimedia Keys
+    awful.key({ }, "XF86AudioRaiseVolume", function () awful.util.spawn('mpc -h localhost volume +1') end),
+    awful.key({ }, "XF86AudioLowerVolume", function () awful.util.spawn('mpc -h localhost volume -1') end),
+    awful.key({ }, "XF86AudioMute", function () awful.util.spawn('mpc -h localhost volume 0') end),
+    awful.key({ }, "XF86AudioNext", function () awful.util.spawn('mpc -h localhost next') end),
+    awful.key({ }, "XF86AudioPrev", function () awful.util.spawn('mpc -h localhost prev') end),
+    awful.key({ }, "XF86AudioPlay", function () awful.util.spawn('mpc -h localhost toggle') end)
 </source>
@@ Line 24: / Line 44: @@
 * pavucontrol (GTK based mixer application)
 * paprefs (GTK based configuration tool)
+* pulseaudio-alsa
+With ''pulseaudio-alsa'', applications may use a virtual ALSA device for output. They show up as regular PulseAudio clients and there is an ALSA mixer channel to control the volume.
 Note: in order to discover remote soundcards, one has to start ''avahi-daemon''!
+[[Category:Arch Teapot]]