'man alsamixer' shows how to access the functions the F keys should do. However, I'd spent hours messing with alsamixer months ago, to no avail. On my CentOS 6.8 machine at work, dmesg shows info about the sound card. On my home machine where the sound stopped working, I get none of those sound messages from dmesg. That's another clue that it's something to do with a config file that got trashed. But comparing what I see as relevant config files between both machines, I see no difference. Obviously, there's something I'm not aware of regarding boot up initialization of the sound system. If there's any other info I can provide, please let me know. Jeff On Sunday 21 August 2016 15:47:59 j_post wrote: > On Sunday 21 August 2016 15:32:55 Frank Cox wrote: > > On Sun, 21 Aug 2016 14:55:50 -0700 > > > > j_post wrote: > > > On Sunday 21 August 2016 13:50:25 Frank Cox wrote: > > > > On Sun, 21 Aug 2016 13:39:29 -0700 > > > > > > > > j_post wrote: > > > > > Sound stopped working on my CentOS 6.8 system several months ago. > > > > > > > > alsamixer may tell you something useful. > > > > > > When I select HDA Intel PCH, which is what it should be using, > > > everything looks normal with one possible exception. There are three > > > volume sliders labeled S/PDIF and the second one has "Default" tacked > > > on to it. All three have volume set at zero and alsamixer won't allow > > > any change. > > > > > > The default should be HDA Intel PCH. > > > > I think you set the default with the space bar, though I haven't done it > > in a sufficiently long time that I'm not completely certain of that. > > Space doesn't do anything, but there are clearly problems with alsamixer. > The only function key that works is F6 (Select sound card). F1 - F5 are > supposed to do other things but they all cause alsamixer to exit. Does it > matter that I'm running alsamixer from the command line? If I need to > invoke it from a GUI, how can that be done? > > Thanks for your help, > Jeff > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos >