Description of problem: ASRock 960GC-GS FX desktop motherboard Realtek ALC662 sound chipset that uses HDA audio Version-Release number of selected component (if applicable): 4.3.5-300.fc23.x86_64+debug #1 SMP How reproducible: Not sure Steps to Reproduce: 1. Have Fedora 21 2. Update to Fedora 22 Actual results: Sound doesn't work, all it shows is a 'dummy audio output' and no audio inputs. Expected results: The sound should work and there should be at least two available audio drivers: the motherboard's and the graphics cards's HDMI output. Additional info: I upgraded from Fedora 21 to Fedora 22 and the sound went away. I then upgraded from F22 to F23 and I still have the same issue. Is there a way to reset or reinstall the audio drivers? A liveDVD Fedora 23 does have sound, it's just the upgrade killed it somehow. The output of lshw https://paste.fedoraproject.org/323501/63431714/raw/ I also deleted the pulseaudio configuration files in ~/.config/pulse pulseaudio -k The output of aplay -l: aplay: device_list:268: no soundcards found... The output of aplay -L: null Discard all samples (playback) or generate zero samples (capture) pulse PulseAudio Sound Server default Default ALSA Output (currently PulseAudio Sound Server) Any help is greatly appreciated!
I should add that the sound still worked if I switched to the old F21 kernel, but no kernel from F22 and F23. Unfortunately, I upgraded my system and now my old F21 kernel is gone. Thanks
A related bug may be this one: https://bugzilla.redhat.com/show_bug.cgi?id=1255070
This was fixed by compiling a separate kernel with the config: CONFIG_ACPI_REV_OVERRIDE_POSSIBLE I don't understand why the Fedora-delivered kernel does not have this enabled.
This is not a real fix, just a workaround, since asking people to compile their own kernel is not a solution generally applicable.