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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

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Old 01-18-2013, 02:17 PM   #1
DJOtaku
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Registered: Oct 2004
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Distribution: Fedora 20; Arch; Kubuntu; Debian
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Sometimes Sound Devices are Gone until Reboot


I'm on Fedora 17 (haven't upgraded to 18 yet) and using KDE. Every third reboot (on average - not literally) has my sound "card" missing.(card in quotes because it's built into the motherboard) KDE just says "dummy output" and I can't hear anything. I reboot and it comes back.

Likely to be hardware? Software? What commands can I type to gather evidence of where the problem lies?

Thanks,
 
Old 01-20-2013, 12:55 AM   #2
macemoneta
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I had a similar problem, and hunted it down to the HDMI connection to my monitor (check dmesg after a problematic boot). My video card supports sound over the HDMI connection, but the monitor doesn't, which apparently caused a problem. I created a file in /etc/modprobe.d containing:

Code:
blacklist snd_hda_codec_hdmi
I haven't seen the problem since.
 
Old 01-20-2013, 11:52 AM   #3
DJOtaku
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Thanks for the suggestion, but in my case I'm just using regular audio, not HDMI.
 
Old 01-20-2013, 12:33 PM   #4
macemoneta
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That was the point; the (non-functioning) HDMI connection was interfering with the regular audio connection. Try this:

Code:
lsmod | grep -i hdmi | grep -i snd
or
Code:
lsmod | grep -i usb | grep -i snd
Another sound device may be causing your normal audio to not operate correctly.
 
  


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