I have now done some further research on this. First, I tried to reset Windows 10 once again. After finished the reset and having rebooted Windows 10 once more after that. The sound started to work in Windows 10 again. But I also discover something new: If I plugged in the headphones in Windows 10, the sound stopped working in Windows 10 also. If I clicked on the sound icon in the Windows taskbar, Windows would try to fix the sound problem, and asked me to reboot to implement the proposed fix. Then sound started to work again after rebooting ( but only from the speakers ). If I plugged in the headphones, it would work well until I unplugged them. After that the sound stopped working again.
Also note: In Windows 10, there was no popup dialog when I plugged in my headphones the first time (In Ubuntu I get the annoying popup dialog asking what device I plugged in). So this might be an indication that the popup dialog is really not necessary in Ubuntu? Anyway, the next thing I did: After having ensured the sound was working from Windows ( after Windows had fixed the sound problem, and I had rebooted windows to implement the fix ) was to boot into Ubuntu. Now the sound worked from Ubuntu 16.04 also ( as expected, since I had not plugged in any headphones yet). I now tested that the speakers produced sound in Ubuntu and then opened the terminal window and ran the commands: $ ls /proc/asound/ card0 cards devices hwdep modules oss PCH pcm seq timers version $ ls /proc/asound/card0 codec#0 codec#2 eld#2.0 eld#2.1 eld#2.2 id pcm0c pcm0p pcm3p pcm7p pcm8p $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: ALC3246 Analog [ALC3246 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2] Subdevices: 1/1 Subdevice #0: subdevice #0 $ lspci -v | grep Audio 00:1f.3 Audio device: Intel Corporation Device 9d71 (rev 21) Then, opened System Settings->Sound, and confirmed that there was no "Dummy output" in the Output tab. Instead, it now showed "Speakers: Built-in Audio" instead. I then plugged in the headphones, and got the popup dialog "Unknown audio device" and I chose headphones and confirmed that sound was working from the headphones. Then I checked System Settings->Sound again and confirmed that a new item "Headphones: Built-in Audio" was shown in the Output tab. I then unplugged and replugged the headphones five times, every time it worked fine (except for the irritating popup window appearing each time I plugged in the headphones). (The next thing to try now is to reboot Ubuntu once more. I will continue this comment after having rebooted) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1636905 Title: Sound card not recognized on Dell Vostro 5568 Status in alsa-driver package in Ubuntu: New Bug description: I just reinstalled a fresh Ubuntu 16.10 on my Dell Vostro 5568 laptop. The audio controller on the laptop is a Realtek ALC3246 with Waves MaxxAudio Pro. The external interface connector is a microphone in/stereo headphones/external speakers connector. When I select "System Settings->Sound" the output device in the dialog window shows as "Dummy Output" and when I press the "Test Sound" button no sound is heard from either front left or front right speaker ( I have ensured sound is not muted ). Note: Before reinstalling, I asked a question on askubuntu,com: http://askubuntu.com/q/841759/156688 So reinstallation of Ubuntu 16.10 did not help on my sound problem. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1636905/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
