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Fedora 15 and no sound

From: John Aldrich 
------------------------------------------------------
F15 is working remarkably well. Since I rebooted with the KVM on the linux 
box, the scroll is working again (imagine that...) Unfortunately I don't 
have sound. Sound *was* working before I upgraded. This is an nVidia 
motherboard and sound chipset. Here's the output of the alsa-info script... 
not sure what's the relevant portions and what can be ignored so I'm 
posting the whole thing. Interestingly enough, it *appears* to be aliasing 
an Intel sound chipset for the nVidia chipset if I'm reading it right...
upload=true&script=true&cardinfo=
!!################################
!!ALSA Information Script v 0.4.60
!!################################

!!Script ran on: Mon May 30 03:37:50 UTC 2011


!!Linux Distribution
!!------------------

Fedora release 15 (Lovelock) Fedora release 15 (Lovelock) Fedora release 15 
(Lovelock) Fedora release 15 (Lovelock)


!!DMI Information
!!---------------

Manufacturer:      System manufacturer
Product Name:      System Product Name
Product Version:   System Version


!!Kernel Information
!!------------------

Kernel release:    2.6.38.6-27.fc15.x86

=============================================================== From: John Aldrich ------------------------------------------------------ BTW, I found a "troubleshooting guide" for troubleshooting sound on Fedora. Very light reading. Basically it boils down to using the alsa-info script to identify your hardware, searching for that "subsystem" on google and trying to uninstall Pulseaudio and see if that fixes it. None of that worked. I've been very spoiled in that up until now audio has "just worked." :-( The ONLY change that's been made to the system was to add a set of USB- powered speakers prior to upgrading. Note the *prior* to upgrade. Prior to upgrade, I had audio coming from those speakers. Now I don't. I just double-checked the speakers to make sure they were working and they are.

=============================================================== From: Sean Brewer ------------------------------------------------------ You tried running alsamixer and checking to see if the desired channels are un-muted? I've always had weird sound issues with Fedora. x .. g 15