The surround40 alias has the front channels muted with alsa-lib-1.0.10 (also rc2 and rc3) and in-kernel drivers from gentoo-sources-2.6.14-r2 (I obtain the same results with surround51 ). Upgrading alsa-driver to 1.0.10 solved the problem (it added the "Front" voice in alsamixer ;) ). Reproducible: Always Steps to Reproduce: 1. $ speaker-test -D surround40 -c 4 Actual Results: Only rear channels working Expected Results: Front ones working too! I'm on an Athlon64 3200+ with a SBLive! Value [CT4832] (rev.8) # emerge info Portage 2.0.51.22-r3 (default-linux/amd64/2005.0, gcc-3.4.4, glibc-2.3.5-r2, 2.6.14-gentoo-r2 x86_64) ================================================================= System uname: 2.6.14-gentoo-r2 x86_64 AMD Athlon(tm) 64 Processor 3200+ Gentoo Base System version 1.6.13 distcc 2.18.3 x86_64-pc-linux-gnu (protocols 1 and 2) (default port 3632) [disabled] ccache version 2.3 [disabled] dev-lang/python: 2.4.2 sys-apps/sandbox: 1.2.9 sys-devel/autoconf: 2.13, 2.59-r6 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r1 sys-devel/binutils: 2.16.1 sys-devel/libtool: 1.5.20 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="yes" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O3 -march=athlon64 -fprefetch-loop-arrays -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/2/share/config /usr/kde/3.3/env /usr/kde/3.3/share/config /usr/kde/3.3/shutdown /usr/kde/3/share/config /usr/lib/X11/xkb /usr/lib64/mozilla/defaults/pref /usr/share/config /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/splash /etc/terminfo /etc/env.d" CXXFLAGS="-O3 -march=athlon64 -fprefetch-loop-arrays -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/Linux/distributions/gentoo" LINGUAS="it" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="amd64 S3TC X acl alsa apache2 audiofile avi bdf berkdb bitmap-fonts bzip2 cdr crypt cups curl dts eds emboss encode esd exif expat fam ffmpeg flac foomaticdb fortran gdbm gif gimp gimpprint glibc-omitfp glut gnome gpm gstreamer gtk gtk2 hal idn imagemagick imap imlib java jpeg kde kqemu lcms ldap libwww linuxthreads-tls lzw lzw-tiff mad maildir matroska mhash mikmod mng motif mozilla mp3 mpeg mysql ncurses nls ogg openal opengl pam pcre pdflib perl png postgres python qt quicktime readline samba sasl scanner sdl spell ssl tcltk tcpd tiff truetype truetype-fonts type1-fonts udev usb userlocales vorbis xml xml2 xmms xpm xv xvid zlib video_cards_radeon linguas_it userland_GNU kernel_linux elibc_glibc" Unset: ASFLAGS, CTARGET, LANG, LC_ALL, LDFLAGS, MAKEOPTS
2.6.14 alsa drivers are 1.0.10_rc1; use media-sound/alsa-driver-1.0.10 final from the ebuild if it works for you, that's why we provide it. http://www.gentoo.org/doc/en/alsa-guide.xml
