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I did a dual-boot of 16.04 Ubuntu and windows 10. for a couple of days my system worked fine but now I have no sound in both ubuntu and windows.

After reading the forums, I tried to install pulse-audio but I don't see any output other than HDMI.

Can anyone help on how to get the drivers?

$ lspci -nnk
00:03.0 Audio device [0403]: Intel Corporation Broadwell-U Audio Controller [8086:160c] (rev 09)
    Subsystem: Dell Broadwell-U Audio Controller [1028:0665]
    Kernel driver in use: snd_hda_intel
    Kernel modules: snd_hda_intel

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: broadwellrt286 [broadwell-rt286], device 0: System Playback/Capture (*) []
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 1: broadwellrt286 [broadwell-rt286], device 1: Offload0 Playback (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: broadwellrt286 [broadwell-rt286], device 2: Offload1 Playback (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0


$ pactl list short sinks
0   alsa_output.pci-0000_00_03.0.hdmi-stereo-extra2 module-alsa-card.c  s16le 2ch 44100Hz   SUSPENDED

David, I am not sure why but in my alsamixer or anything it says that I have no devices connected to my laptop except for the HDMI, which I do not want to adjust, I just want to be able to hear sounds from my laptop.

I appreciate your help.

solobyy
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    Could you please [edit] your question to include the output of the terminal commands lspci -nnk | grep -A2 Audio, aplay -l, and pactl list short sinks? Please also make sure that the relevant audio channels in alsamixer (terminal) or gnome-alsamixer (GUI) have their volume turned up and aren’t muted. Thanks. – David Foerster Nov 10 '16 at 15:17
  • If both Windows and Linux are affected by the same issue it's probably a BIOS setting or an altogether faulty device, both of which have nothing to do with Ubuntu. – David Foerster Nov 11 '16 at 12:45
  • I have made sure the audio is on from the BIOS. I also find it hard to believe that it's a coincidence that the audio just stops working just days after I dualbooted because my machine has been running solid for over a year with no issues. – solobyy Nov 12 '16 at 02:38
  • I even tried to download audio drivers and reinstalled them from windows, and still no luck. Really, ANY help will be appreciated I really want to listen to music while I code! – solobyy Nov 12 '16 at 02:41
  • Update. I got the sound working by downloaidng the realtek drivers but my ubuntu still doesn't output any sounds. Good news is that when I do aplay -l, I get a card 1 now. It's written above. – solobyy Nov 14 '16 at 03:56
  • How did you install the driver? – David Foerster Nov 14 '16 at 08:04
  • I downloaded it on realtek's website from my windows partition and just ran the .exe. But I am sad to say even my windows doesn't get sound anymore after i restarted my machine. it just seems very unstable for some reason. – solobyy Nov 16 '16 at 00:04
  • Another update: Weird but a temporary fix to the problem I have found is that if I boot into windows first, then power down and turn on linux my sound works. but i have no sound recognized on windows or if i just turn on linux straight away... very annoying please help!! – solobyy Nov 16 '16 at 04:54
  • If you haven't already, could you please turn off Fast Boot in Windows so it shuts down completely before you (re-)boot into Ubuntu? Sometimes Windows drivers leave device firmware in a state that renders them unusable to dual-booted operating systems. Conversely the same driver might then be confused if a different operating system tried to claim the same device. – David Foerster Nov 16 '16 at 09:14

2 Answers2

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I was having the same problem, specifically after Windows went into hibernation (Fastboot is off). Pushing the following command into terminal, as described in this Q/A, solves the issue: pulseaudio -k && sudo alsa force-reload

David Brown
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Check if audio device is not disabled in BIOS (not sure but probably: "System configuration" -> "Audio").

Jacek Herbrych
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