Under the section titled "Code Listing 3.5: Unmuting Channels", the example code reads # amixer set Master 100 unmute In alsa-utils-0.9.2 that channel is actually named "Master Digital". There is no "Master". The command need on my system was # amixer set "Digital Master" 100 unmute Reproducible: Always Steps to Reproduce: 1. simple execute # amixer set Master 100 unmute Actual Results: I receive the error amixer: Unable to find simple control 'Master',0 Expected Results: The output should have read Simple mixer control 'Master Digital',0 Capabilities: volume pswitch cswitch Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 71 Front Left: 71 [100%] Playback [on] Capture [off] Front Right: 71 [100%] Playback [on] Capture [off] Portage 2.0.49-r3 (default-x86-1.4, gcc-3.2.3, glibc-2.3.2-r1, 2.4.20-gentoo-r6) ================================================================= System uname: 2.4.20-gentoo-r6 i686 Intel(R) Celeron(TM) CPU 1300MHz ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CFLAGS="-O3 -march=pentium3 -funroll-loops -pipe" CHOST="i686-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /var/qmail/control /usr/share/config /usr/kde/2/share/config /usr/kde/3/share/config /usr/X11R6/lib/X11/xkb /usr/kde/3.1/share/config" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" CXXFLAGS="-O3 -march=pentium3 -funroll-loops -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="sandbox ccache autoaddcvs" GENTOO_MIRRORS="http://www.ibiblio.org/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="x86 oss apm avi crypt encode foomaticdb gif gpm jpeg libg++ libwww mad mikmod mmx mpeg ncurses nls pdflib png quicktime slang spell truetype xml2 xmms xv zlib directfb alsa gdbm berkdb readline arts bonobo svga java mysql postgres X sdl tcpd pam ssl perl python esd imlib oggvorbis motif opengl mozilla ldap cdr qt kde cups usb pda -gnome -gtk"
Is this card-specific? I have the same version of alsa-utils but don't have "Digital Master".
I think you may be right about about this being hardware specific. I am haviung this problem using a snd-cs4236 module. I did a Google search for 'amixer set "Master Digital"' and most of the hist reference the cs4236 of cs4237. Seems like a smoking gun to me. FYI, in my initial submission I transposed some words. The command that works on my installation is amixer set "Master Digital" 100 unmute I guess you could close this bug. I don't know if it's worth amending the docs for this board or not. Incidentally, alsamixer shows the correct control name and circumvents the potential device dependency of the amxer command syntax. Of course this does not have the simplicity of amixer.
Okay :)
