Ok, after reading Jim McCloskey's posts on the UA-1EX here is what I tried (keep in mind I am still a Linux newbie somewhat): UA-1EX with Advanced Driver Switch = OFFSystem is Mandriva 2007.0 PWP, kernel 2.6.17-6mdv running on a Compaq nx9010 laptop. # modprobe snd-usb-audio Jan 11 20:29:15 nx9010 kernel: usbcore: registered new driver snd-usb-audio #alsaconfJan 11 20:40:29 nx9010 kernel: ACPI: PCI interrupt for device 0000:00:06.0 disabled Has ACPI (Power Management) disabled the interrupt for the built-in sound card: Let's look at MCC...Description: M5451 PCI South Bridge AudioMedia class: MULTIMEDIA_AUDIOConnectionBus: PCIBus PCI #: 0PCI device #: 6PCI function #: 0Vendor ID: 0x10b9Device ID: 0x5451Sub vendor ID: 0x103cSub device ID: 0x0850DriverModule: snd-ali5451Alternative drivers: trident Looks like it because no sound from either the built in soundcard or the UA-1EX. Unplug UA-1EX and plug back in after 10 seconds: Jan 11 20:47:22 nx9010 kernel: usb 2-2: new full speed USB device using uhci_hcd and address 3Jan 11 20:47:22 nx9010 kernel: usb 2-2: configuration #1 chosen from 1 choiceJan 11 20:47:22 nx9010 kernel: usbcore: registered new driver snd-usb-audio And MCC identifies UA-1EX correctly as a USB Sound Device:IdentificationVendor: EDIROLDescription: UA-1EXMedia class: Audio|Control DeviceConnectionBus: USBBus PCI #: 2PCI device #: 3Vendor ID: 0x0582Device ID: 0x0097Sub vendor ID: 0x0000Sub device ID: 0x0000MiscModule: snd-usb-audio And yes! There is now sound output from the UA-1EX! Sounds great into Koss Porta-Pro headphones. Reboot and no sound! Unplug and plug back in after 10 seconds: Jan 11 21:42:36 nx9010 kernel: usb 2-2: USB disconnect, address 2Jan 11 21:42:48 nx9010 kernel: usb 2-2: new full speed USB device using uhci_hcd and address 3Jan 11 21:42:48 nx9010 kernel: usb 2-2: configuration #1 chosen from 1 choice Note no load of snd-usb-audio. # lsmod | grep snd_usb_audiosnd_usb_audio 74496 0snd_usb_lib 15072 1 snd_usb_audiosnd_hwdep 7556 1 snd_usb_audiosnd_pcm 70116 4 snd_usb_audio,snd_pcm_oss,snd_ali5451,snd_ac97_codecsnd 46500 14 snd_usb_audio,snd_rawmidi,snd_hwdep,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_ali5451,snd_ac97_codec,snd_pcm,snd_timer usbcore 113472 6 snd_usb_audio,snd_usb_lib,ndiswrapper,ehci_hcd,uhci_hcd so driver seems to be loaded... but sound still only thru built in sound card. Try unloading snd-usb-audio module...# modprobe -r snd-usb-audioJan 11 21:49:49 nx9010 kernel: usbcore: deregistering driver snd-usb-audio Now load again...# modprobe snd-usb-audioJan 11 21:50:48 nx9010 kernel: usbcore: registered new driver snd-usb-audio Does the UA-1EX output sound now...No! But MCC still shows it as a USB Sound Device:IdentificationVendor: EDIROLDescription: UA-1EXMedia class: Audio|Control DeviceConnectionBus: USBBus PCI #: 2PCI device #: 3Vendor ID: 0x0582Device ID: 0x0097Sub vendor ID: 0x0000Sub device ID: 0x0000MiscModule: snd-usb-audio Stop and restart ALSA:# /etc/rc.d/init.d/alsa stopDoing alsactl to store mixer settings... [ OK ]Shutting down ALSA sound driver (version 1.0.12): [ OK ]Jan 11 22:14:40 nx9010 kernel: usbcore: deregistering driver snd-usb-audioJan 11 22:14:40 nx9010 kernel: ACPI: PCI interrupt for device 0000:00:06.0 disabled # /etc/rc.d/init.d/alsa startStarting ALSA version 1.0.12: ali5451 ali5451. [ OK ] No sound from either built-in card or UA-1EX as shutting down ALSA for some reason caused ACPI to disable the interrupt for the built-in sound card. So it doesn't look like ALSA remembered to load snd-usb-audio into its configuration as the UA-1EX does not output sound still. So issues appear to be: 1 - config ALSA for the 2 sound cards and make sure it remembers this configuration (where does Mandriva keep the Alsa config file and how does one edit it?). . 2 - make sure Mandriva 2007 always loads ali5451 and snd-usb-audio at start up and does not "clean them up". 3 - Why does ACPI disable the built-in sound card's interrupt? Am I on the right track? Maybe someone can help me... Thanks,Dan -------------------------------------------------------------------------Take Surveys. Earn Cash. Influence the Future of ITJoin SourceForge.net's Techsay panel and you'll get the chance to share youropinions on IT & business topics through brief surveys - and earn cashhttp://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV_______________________________________________Alsa-user mailing listAlsa-user@xxxxxxxxxxxxxxxxxxxxxxxxxx://lists.sourceforge.net/lists/listinfo/alsa-user
