Differences

This shows you the differences between two versions of the page.

--- debian_uboot [2012/02/04 18:17] – [Tips] wifi tips paulf
+++ debian_uboot [2012/02/06 09:14] – [Tips] dmix by default, per-app softvol trick paulf
@@ Line 12: / Line 12: @@
   * Stereo sound both on internal speakers and the headphones
   * Webcam
+  * Integrated digital microphone
+  * External stereo headset with microphone
 ==== What doesn't ====
@@ Line 18: / Line 20: @@
   * Resume from suspend-to-ram (pending u-boot warmboot patches, see http://news.gmane.org/group/gmane.comp.boot-loaders.u-boot/thread=122760)
   * Suspend-to-disk/hibernation (not anytime soon, no upstream support for ARMs)
-  * Internal mic (pending stuw's and leonro's alsa updates, not functional yet)
+  * tegra_wdt watchdog resets the system but it doesn't boot after that for the reasons unknown
   * Proprietary drivers for X and OMX-accelerated sound/video decoding (never tried, see https://build.pub.meego.com/package/files?package=nvidia-tegra2&project=home%3Acxl000%3Atrimslice%3AMer%3Atesting , http://ppa.launchpad.net/ac100/ppa/ubuntu/pool/restricted/n/nvidia-graphics-drivers-tegra/ , mplayer-omx, gst-omx etc)
@@ Line 92: / Line 94: @@
 rm $cookies_file
 </code>
+  * To have automatic software mixing of sound streams copy this to ''/usr/share/alsa/cards/tegra-alc5632.conf'':
+<code>
+# default with dmix/dsnoop
+tegra-alc5632.pcm.default {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type asym
+	playback.pcm {
+		type plug
+		slave.pcm {
+			@func concat
+			strings [ "dmix:CARD=" $CARD ",RATE=44100" ]
+		}
+	}
+	capture.pcm {
+		type plug
+		slave.pcm {
+			@func concat
+			strings [ "dsnoop:CARD=" $CARD ",RATE=44100" ]
+		}
+	}
+}
+</code>
+  * To provide additional dedicated sound volume controls without PA add this to ''~/.asoundrc'':
+<code>
+pcm.softvol {
+        @args [ NAME ]
+        @args.NAME.type string
+        type softvol
+        slave.pcm "default"
+        control.name $NAME
+}
+</code>
+And use softvol:<custom name> for the ALSA device, like this: ''aplay -Dsoftvol:"Aplay Dedicated" testmusic.wav''
   * [[http://linuxwireless.org/en/users/Download|compat-wireless]] provides newer wireless drivers that work better but wireless extensions will not be enabled until the kernel is compiled with support for some old pre-mac80211 driver (to select ''CONFIG_WIRELESS_EXT'').
   * ''iw dev wlan0 set power_save off'' to improve interactivity when a power-saving compatible AP is used