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Thread: Config files to check?

  1. #1
    Join Date
    Feb 2007
    Location
    Tucson, AZ, USA
    Beans
    13
    Distro
    Kubuntu 10.04 Lucid Lynx

    VIA 8237 digital problem solved

    Hi all,
    I've got an old Shuttle SK43G with an onboard Via 8237 chip that I use as a music jukebox through the optical out connection. I'd been doing this successfully with Kubuntu for over a year. Well, the machine was getting kind of clogged up with crud, so I decided to do a clean install of Hardy from scratch. Now, the digital out no longer works, but I can get (rather crappy) sound out of the analog outputs. I have an XP partition and the digital sound works fine there, so I know it's not the amp / speakers.

    The good news is that I backed up my gutsy install before the upgrade, so I can restore it and check the configuration there. However, I have little idea of what files to check. I pretty sure I never created a .asoundrc or /etc/asound.conf file, but I'll obviously look for those. I know to check the alsamixer settings and do an lsmod. What else should I check? What are the configuration files Kubuntu uses to configure the sound?
    Last edited by sneakers563; May 26th, 2008 at 07:58 PM. Reason: solved the problem

  2. #2
    Join Date
    Feb 2007
    Location
    Tucson, AZ, USA
    Beans
    13
    Distro
    Kubuntu 10.04 Lucid Lynx

    Re: Config files to check?

    OK, I solved my digital out problem and I'm posting here for anyone else having trouble with this card. The problem was with my mixer settings (big surprise). Although a lot of people will tell you to unmute everything, I found that I needed to mute almost everything in order to get sound out of the optical out.

    Here's my amixer output as a guide. For those who are new, anything marked [off] is muted.

    Code:
    Simple mixer control 'Master',0
      Capabilities: pvolume pswitch pswitch-joined
      Playback channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono:
      Front Left: Playback 31 [100%] [0.00dB] [on]
      Front Right: Playback 31 [100%] [0.00dB] [on]
    Simple mixer control 'Master Mono',0
      Capabilities: pvolume pvolume-joined pswitch pswitch-joined
      Playback channels: Mono
      Limits: Playback 0 - 31
      Mono: Playback 0 [0%] [-46.50dB] [off]
    Simple mixer control '3D Control - Center',0
      Capabilities: volume volume-joined
      Playback channels: Mono
      Capture channels: Mono
      Limits: 0 - 15
      Mono: 0 [0%]
    Simple mixer control '3D Control - Depth',0
      Capabilities: volume volume-joined
      Playback channels: Mono
      Capture channels: Mono
      Limits: 0 - 15
      Mono: 0 [0%]
    Simple mixer control '3D Control - Switch',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'PCM',0
      Capabilities: pvolume pswitch pswitch-joined
      Playback channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono:
      Front Left: Playback 28 [90%] [7.50dB] [on]
      Front Right: Playback 28 [90%] [7.50dB] [on]
    Simple mixer control 'Surround',0
      Capabilities: pvolume pswitch
      Playback channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono:
      Front Left: Playback 31 [100%] [0.00dB] [off]
      Front Right: Playback 31 [100%] [0.00dB] [off]
    Simple mixer control 'Surround Down Mix',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'Surround Jack Mode',0
      Capabilities: enum
      Items: 'Shared' 'Independent'
      Item0: 'Independent'
    Simple mixer control 'Center',0
      Capabilities: pvolume pvolume-joined pswitch pswitch-joined
      Playback channels: Mono
      Limits: Playback 0 - 31
      Mono: Playback 31 [100%] [0.00dB] [off]
    Simple mixer control 'Center/LFE Down Mix',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'LFE',0
      Capabilities: pvolume pvolume-joined pswitch pswitch-joined
      Playback channels: Mono
      Limits: Playback 0 - 31
      Mono: Playback 31 [100%] [0.00dB] [off]
    Simple mixer control 'Line',0
      Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
      Capture exclusive group: 0
      Playback channels: Front Left - Front Right
      Capture channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Front Left: Playback 29 [94%] [9.00dB] [off] Capture [off]
      Front Right: Playback 29 [94%] [9.00dB] [off] Capture [off]
    Simple mixer control 'CD',0
      Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
      Capture exclusive group: 0
      Playback channels: Front Left - Front Right
      Capture channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Front Left: Playback 29 [94%] [9.00dB] [off] Capture [off]
      Front Right: Playback 29 [94%] [9.00dB] [off] Capture [off]
    Simple mixer control 'Mic',0
      Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch cswitch-exclusive
      Capture exclusive group: 0
      Playback channels: Mono
      Capture channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono: Playback 29 [94%] [9.00dB] [off]
      Front Left: Capture [off]
      Front Right: Capture [off]
    Simple mixer control 'Mic Boost (+20dB)',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'Mic Select',0
      Capabilities: enum
      Items: 'Mic1' 'Mic2'
      Item0: 'Mic1'
    Simple mixer control 'Video',0
      Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
      Capture exclusive group: 0
      Playback channels: Front Left - Front Right
      Capture channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Front Left: Playback 29 [94%] [9.00dB] [off] Capture [off]
      Front Right: Playback 29 [94%] [9.00dB] [off] Capture [off]
    Simple mixer control 'Phone',0
      Capabilities: pvolume pvolume-joined pswitch pswitch-joined cswitch cswitch-exclusive
      Capture exclusive group: 0
      Playback channels: Mono
      Capture channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono: Playback 29 [94%] [9.00dB] [off]
      Front Left: Capture [off]
      Front Right: Capture [off]
    Simple mixer control 'IEC958',0
      Capabilities: pswitch pswitch-joined cswitch cswitch-joined
      Playback channels: Mono
      Capture channels: Mono
      Mono: Playback [on] Capture [on]
    Simple mixer control 'IEC958 Output',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'IEC958 Playback AC97-SPSA',0
      Capabilities: volume volume-joined
      Playback channels: Mono
      Capture channels: Mono
      Limits: 0 - 3
      Mono: 2 [67%]
    Simple mixer control 'PC Speaker',0
      Capabilities: pvolume pvolume-joined pswitch pswitch-joined
      Playback channels: Mono
      Limits: Playback 0 - 15
      Mono: Playback 15 [100%] [0.00dB] [off]
    Simple mixer control 'Aux',0
      Capabilities: pvolume pswitch pswitch-joined cswitch cswitch-exclusive
      Capture exclusive group: 0
      Playback channels: Front Left - Front Right
      Capture channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Front Left: Playback 29 [94%] [9.00dB] [off] Capture [off]
      Front Right: Playback 29 [94%] [9.00dB] [off] Capture [off]
    Simple mixer control 'Mono Output Select',0
      Capabilities: enum
      Items: 'Mix' 'Mic'
      Item0: 'Mix'
    Simple mixer control 'Capture',0
      Capabilities: cvolume cswitch cswitch-joined
      Capture channels: Front Left - Front Right
      Limits: Capture 0 - 15
      Front Left: Capture 0 [0%] [0.00dB] [on]
      Front Right: Capture 0 [0%] [0.00dB] [on]
    Simple mixer control 'Mix',0
      Capabilities: cswitch cswitch-exclusive
      Capture exclusive group: 0
      Capture channels: Front Left - Front Right
      Front Left: Capture [on]
      Front Right: Capture [on]
    Simple mixer control 'Mix Mono',0
      Capabilities: cswitch cswitch-exclusive
      Capture exclusive group: 0
      Capture channels: Front Left - Front Right
      Front Left: Capture [off]
      Front Right: Capture [off]
    Simple mixer control 'Analog to IEC958 Output',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [on]
    Simple mixer control 'Channel Mode',0
      Capabilities: enum
      Items: '2ch' '4ch' '6ch'
      Item0: '2ch'
    Simple mixer control 'Duplicate Front',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'Exchange Center/LFE',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'External Amplifier',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'Input Source Select',0
      Capabilities: enum
      Items: 'Input1' 'Input2'
      Item0: 'Input1'
    Simple mixer control 'Input Source Select',1
      Capabilities: enum
      Items: 'Input1' 'Input2'
      Item0: 'Input1'
    Simple mixer control 'Swap Surround Slot',0
      Capabilities: pswitch pswitch-joined
      Playback channels: Mono
      Mono: Playback [off]
    Simple mixer control 'VIA DXS',0
      Capabilities: pvolume
      Playback channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono:
      Front Left: Playback 25 [81%] [-57.00dB]
      Front Right: Playback 25 [81%] [-57.00dB]
    Simple mixer control 'VIA DXS',1
      Capabilities: pvolume
      Playback channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono:
      Front Left: Playback 25 [81%] [-57.00dB]
      Front Right: Playback 25 [81%] [-57.00dB]
    Simple mixer control 'VIA DXS',2
      Capabilities: pvolume
      Playback channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono:
      Front Left: Playback 25 [81%] [-57.00dB]
      Front Right: Playback 25 [81%] [-57.00dB]
    Simple mixer control 'VIA DXS',3
      Capabilities: pvolume
      Playback channels: Front Left - Front Right
      Limits: Playback 0 - 31
      Mono:
      Front Left: Playback 25 [81%] [-57.00dB]
      Front Right: Playback 25 [81%] [-57.00dB]

  3. #3
    Join Date
    Feb 2007
    Location
    Tucson, AZ, USA
    Beans
    13
    Distro
    Kubuntu 10.04 Lucid Lynx

    Re: Config files to check?

    After further experimentation, it appears that the critical thing is to make sure that Capture is set to "on" in the 'Mix' control. It's weird, but fiddling with other, apparently unrelated controls in alsamixer or Kmix can cause the Capture property in 'Mix' to turn off. In that case, I'm unable to find a way to fix it in either alsamixer or Kmix. The only way to correct things is to set it manually with "amixer set 'Mix' cap".

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