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Sound lost after recent update

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http://forums.fedoraforum.org – I lost my sound after a recent update. The last time I am positive that I had sound working was Friday night (December 4th) -- watched a bunch of episodes of "Modern Family" from Hulu. I didn't shut down or reboot my laptop after the Hulu session Friday night until I left for work this morning, so the updates on the 5th and the 7th happened without any reboots (this morning I did an update, shut down, traveled to work, and turned on the laptop -- only to be greeted by silence). I reviewed the updates done between the 3rd and today -- the complete list is below -- even though I rebooted several times on the 4th and everything was fine. This morning I tried removing/rolling back anything that seemed sound-related (and I also rolled back ibus because I don't know what it is), to no avail: sudo rpm --erase gstreamer-plugins-bad-0.10.17-2.fc12.x86_64 gstreamer-plugins-bad-extras-0.10.17-2.fc12.x86_64 sudo rpm -Uvih --oldpackage ibus-qt-1.2.0.20091014-1.fc12.x86_64.rpm sudo rpm -Uvih --oldpackage libsndfile-1.0.20-2.fc12.* (did both 32-bit and 64-bit) sudo rpm -Uvih --oldpackage ibus-m17n-1.2.0.20090617-5.fc12.x86_64.rpm sudo rpm -Uvih --oldpackage gstreamer-plugins-good-0.10.17-1.fc12.x86_64.rpm booted into the 'old' Kernel (2.6.31.6-145.fc12.x86_64), the one that was running when things were working I don't see anything strange in /var/log/messages, and the hardware is found: Code: Dec  7 11:56:15 cylon kernel: HDA Intel 0000:00:1b.0: PCI INT A -> GSI 21 (level, low) -> IRQ 21 Dec  7 11:56:15 cylon kernel: input: HDA Digital PCBeep as /devices/pci0000:00/0000:00:1b.0/input/input11 Dec  7 11:56:15 cylon kernel: input: HDA Intel Mic at Ext Left Jack as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12 Dec  7 11:56:15 cylon kernel: input: HDA Intel HP Out at Ext Left Jack as /devices/pci0000:00/0000:00:1b.0/sound/card0/input13 The PulseAudio server is running, and I did try Code: pulseaudio --kill pulseaudio --start I checked the volume levels and mute toggles on both the KDE volume widget and using the alsamixer text-mode application. Any other suggestions? Here is my /var/log/yum.log from the 3rd through today: Code: Dec 03 07:42:14 Updated: ibus-libs-1.2.0.20091124-1.fc12.x86_64 Dec 03 07:42:16 Updated: libsndfile-1.0.20-3.fc12.x86_64 Dec 03 07:42:19 Installed: flac-1.2.1-6.fc12.i686 Dec 03 07:42:21 Updated: mdadm-3.0.3-2.fc12.x86_64 Dec 03 07:42:25 Updated: wget-1.12-2.fc12.x86_64 Dec 03 07:42:25 Updated: sysprof-1.1.4-1.fc12.x86_64 Dec 03 07:42:27 Updated: xorg-x11-drv-dummy-0.3.3-1.fc12.x86_64 Dec 03 07:42:27 Updated: gnome-python2-libwnck-2.28.0-2.fc12.x86_64 Dec 03 07:42:27 Updated: gnome-python2-desktop-2.28.0-2.fc12.x86_64 Dec 03 07:42:28 Updated: gnome-python2-applet-2.28.0-2.fc12.x86_64 Dec 03 07:42:28 Updated: gnome-python2-gnomekeyring-2.28.0-2.fc12.x86_64 Dec 03 07:42:29 Updated: fontpackages-filesystem-1.41-1.fc12.noarch Dec 03 07:42:29 Updated: libsndfile-1.0.20-3.fc12.i686 Dec 03 07:42:30 Updated: ibus-gtk-1.2.0.20091124-1.fc12.x86_64 Dec 03 07:42:39 Updated: ibus-1.2.0.20091124-1.fc12.x86_64 Dec 03 07:51:02 Installed: VirtualBox-3.1-3.1.0_55467_fedora12-1.x86_64 Dec 03 19:16:55 Installed: zbar-0.10-1.fc12.x86_64 Dec 03 19:16:58 Updated: gstreamer-plugins-bad-0.10.17-1.fc12.x86_64 Dec 03 19:17:00 Updated: gstreamer-plugins-bad-extras-0.10.17-1.fc12.x86_64 Dec 05 18:40:55 Updated: expat-2.0.1-8.fc12.x86_64 Dec 05 18:40:58 Updated: krb5-libs-1.7-10.fc12.x86_64 Dec 05 18:41:00 Updated: sqlite-3.6.20-1.fc12.x86_64 Dec 05 18:41:02 Updated: bluez-libs-4.58-1.fc12.x86_64 Dec 05 18:41:13 Updated: subversion-1.6.6-1.fc12.x86_64 Dec 05 18:41:24 Updated: wireshark-1.2.4-1.fc12.x86_64 Dec 05 18:41:37 Updated: libpurple-2.6.4-2.fc12.x86_64 Dec 05 18:41:39 Updated: libxcb-1.4-2.fc12.x86_64 Dec 05 18:41:40 Updated: krb5-libs-1.7-10.fc12.i686 Dec 05 18:41:41 Updated: expat-2.0.1-8.fc12.i686 Dec 05 18:41:42 Updated: libxcb-1.4-2.fc12.i686 Dec 05 18:41:42 Updated: subversion-javahl-1.6.6-1.fc12.x86_64 Dec 05 18:41:43 Updated: perl-Params-Validate-0.92-1.fc12.x86_64 Dec 05 18:41:43 Updated: sqlite-3.6.20-1.fc12.i686 Dec 05 18:41:44 Updated: krb5-devel-1.7-10.fc12.x86_64 Dec 05 18:41:45 Updated: krb5-workstation-1.7-10.fc12.x86_64 Dec 05 18:42:03 Updated: pidgin-2.6.4-2.fc12.x86_64 Dec 05 18:42:04 Updated: wireshark-gnome-1.2.4-1.fc12.x86_64 Dec 05 18:42:05 Updated: bluez-4.58-1.fc12.x86_64 Dec 05 18:42:06 Updated: bluez-cups-4.58-1.fc12.x86_64 Dec 05 18:42:08 Updated: gdb-7.0-8.fc12.x86_64 Dec 05 18:42:10 Updated: 2:nmap-5.00-4.fc12.x86_64 Dec 05 18:42:12 Updated: 1:smartmontools-5.38-23.fc12.x86_64 Dec 05 18:42:18 Updated: sound-juicer-2.28.1-1.fc12.x86_64 Dec 05 18:42:19 Updated: crda-1.1.0_2009.11.25-1.fc12.x86_64 Dec 05 18:42:26 Updated: gstreamer-plugins-good-0.10.17-3.fc12.x86_64 Dec 05 18:42:26 Updated: ibus-m17n-1.2.0.20091120-1.fc12.x86_64 Dec 05 18:42:31 Updated: gkrellm-2.3.2-7.fc12.x86_64 Dec 05 18:42:32 Updated: openconnect-2.11-1.fc12.x86_64 Dec 05 18:42:32 Updated: cups-pk-helper-0.0.4-9.fc12.x86_64 Dec 05 18:42:32 Updated: libxcb-devel-1.4-2.fc12.x86_64 Dec 05 18:42:33 Updated: python-urlgrabber-3.9.1-4.fc12.noarch Dec 05 18:42:33 Updated: expat-devel-2.0.1-8.fc12.x86_64 Dec 05 18:42:34 Updated: sos-1.8-18.fc12.noarch Dec 05 18:42:34 Updated: sqlite-devel-3.6.20-1.fc12.x86_64 Dec 05 18:42:37 Updated: lohit-tamil-fonts-2.4.5-1.fc12.noarch Dec 07 07:50:18 Updated: gpm-libs-1.20.6-8.fc12.x86_64 Dec 07 07:50:18 Updated: 1:NetworkManager-glib-0.7.996-7.git20091113.fc12.x86_64 Dec 07 07:50:19 Updated: ModemManager-0.2-4.20091105.fc12.x86_64 Dec 07 07:50:20 Updated: gstreamer-plugins-bad-0.10.17-2.fc12.x86_64 Dec 07 07:50:21 Updated: 1:NetworkManager-0.7.996-7.git20091113.fc12.x86_64 Dec 07 07:50:22 Updated: gpm-1.20.6-8.fc12.x86_64 Dec 07 07:50:22 Updated: ibus-qt-1.2.0.20091206-2.fc12.x86_64 Dec 07 07:50:25 Updated: bouncycastle-1.44-1.fc12.x86_64 Dec 07 07:50:26 Updated: bouncycastle-mail-1.44-1.fc12.x86_64 Dec 07 07:50:27 Updated: gmime-2.4.11-1.fc12.x86_64 Dec 07 07:50:38 Installed: kernel-devel-2.6.31.6-162.fc12.x86_64 Dec 07 07:50:39 Updated: kernel-firmware-2.6.31.6-162.fc12.noarch Dec 07 07:50:39 Updated: 10:buildsys-build-rpmfusion-12-4.x86_64 Dec 07 07:50:40 Updated: bouncycastle-tsp-1.44-1.fc12.x86_64 Dec 07 07:50:45 Updated: 1:NetworkManager-gnome-0.7.996-7.git20091113.fc12.x86_64 Dec 07 07:50:46 Updated: gstreamer-plugins-bad-extras-0.10.17-2.fc12.x86_64 Dec 07 07:50:46 Updated: nano-2.0.9-4.fc12.x86_64 Dec 07 07:50:48 Updated: eclipse-oprofile-0.4.0-1.fc12.x86_64 Dec 07 07:50:49 Updated: 1:telepathy-mission-control-5.2.6-1.fc12.x86_64 Dec 07 07:50:50 Updated: nspluginwrapper-1.3.0-10.fc12.x86_64 Dec 07 07:50:50 Updated: telepathy-gabble-0.8.8-2.fc12.x86_64 Dec 07 07:50:50 Updated: 10:buildsys-build-rpmfusion-kerneldevpkgs-current-12-4.x86_64 Dec 07 07:50:51 Updated: gpm-devel-1.20.6-8.fc12.x86_64 Dec 07 07:50:51 Updated: perf-2.6.31.6-162.fc12.noarch Dec 07 07:50:53 Updated: kernel-headers-2.6.31.6-162.fc12.x86_64 Dec 07 07:50:55 Updated: python-paramiko-1.7.6-1.fc12.noarch Dec 07 07:51:39 Installed: kernel-2.6.31.6-162.fc12.x86_64 Dec 07 07:51:40 Installed: kmod-nvidia-2.6.31.6-162.fc12.x86_64-190.42-1.fc12.7.x86_64 Dec 07 07:51:41 Updated: kmod-nvidia-190.42-1.fc12.7.x86_64 Dec 07 07:51:41 Updated: vcdimager-libs-0.7.23-11.fc12.x86_64 Dec 07 07:51:42 Updated: vcdimager-0.7.23-11.fc12.x86_64 Dec 07 07:51:58 Erased: kmod-nvidia-2.6.31.5-122.fc12.x86_64 (HowTos)