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DJOtaku 01-18-2013 01:17 PM

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?


macemoneta 01-19-2013 11:55 PM

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:


blacklist snd_hda_codec_hdmi
I haven't seen the problem since.

DJOtaku 01-20-2013 10:52 AM

Thanks for the suggestion, but in my case I'm just using regular audio, not HDMI.

macemoneta 01-20-2013 11:33 AM

That was the point; the (non-functioning) HDMI connection was interfering with the regular audio connection. Try this:


lsmod | grep -i hdmi | grep -i snd

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

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