snd-intel8x0 only support stereo and does not support mono can you post the pulseaudio log?
1 card(s) available. index: 0 name: <alsa_card.pci-0000_00_1f.5> driver: <module-alsa-card.c> owner module: 4 properties: alsa.card = "0" alsa.card_name = "Intel ICH5" alsa.long_card_name = "Intel ICH5 with AD1981B at irq 17" alsa.driver_name = "snd_intel8x0" device.bus_path = "pci-0000:00:1f.5" sysfs.path = "/devices/pci0000:00/0000:00:1f.5/sound/card0" device.bus = "pci" device.vendor.id = "8086" device.vendor.name = "Intel Corporation" device.product.name = "82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller" device.form_factor = "internal" device.string = "0" device.description = "Built-in Audio" module-udev-detect.discovered = "1" device.icon_name = "audio-card-pci" profiles: output:analog-stereo: Analog Stereo Output (priority 6000) output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (priority 6060) output:iec958-stereo: Digital Stereo (IEC958) Output (priority 5500) output:iec958-stereo+input:analog-stereo: Digital Stereo (IEC958) Output + Analog Stereo Input (priority 5560) input:analog-stereo: Analog Stereo Input (priority 60) off: Off (priority 0) active profile: <output:iec958-stereo+input:analog-stereo> sinks: alsa_output.pci-0000_00_1f.5.iec958-stereo/#0: Built-in Audio Digital Stereo (IEC958) sources: alsa_output.pci-0000_00_1f.5.iec958-stereo.monitor/#0: Monitor of Built-in Audio Digital Stereo (IEC958) alsa_input.pci-0000_00_1f.5.analog-stereo/#1: Built-in Audio Analog Stereo ports: analog-output-headphones;output-amplifier-on: Headphones / Amplifier (priority 9010, available: unknown) properties: analog-output-headphones;output-amplifier-off: Headphones / No Amplifier (priority 9000, available: unknown) properties: analog-output-mono;output-amplifier-on: Analog Mono Output / Amplifier (priority 5010, available: unknown) properties: analog-output-mono;output-amplifier-off: Analog Mono Output / No Amplifier (priority 5000, available: unknown) properties: analog-output-lfe-on-mono;output-amplifier-on: LFE on Separate Mono Output / Amplifier (priority 4010, available: unknown) properties: analog-output-lfe-on-mono;output-amplifier-off: LFE on Separate Mono Output / No Amplifier (priority 4000, available: unknown) properties: analog-input-microphone;input-microphone-1: Microphone / Microphone 1 (priority 8720, available: unknown) properties: analog-input-microphone;input-microphone-2: Microphone / Microphone 2 (priority 8719, available: unknown) properties: analog-input-linein: Line In (priority 8100, available: unknown) properties: analog-input: Analog Input (priority 8000, available: unknown) properties: analog-input-video: Video (priority 7000, available: unknown) properties: iec958-stereo-output: Digital Output (S/PDIF) (priority 0, available: unknown) properties: -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1033996 Title: [IBM 818946G, AD1981B (AC97), playback] No sound at all To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs