I've looked everywhere and can't solve this problem. I'm really new to advanced computer stuff and linux. I don't know what to include so just ask and I'll include it. I'm running ubuntu 18.04 on a CB3-111 acer Chromebook. In settings the only audio option is HDMI and it doesn't work. Originally there was only dummy audio as an option but I followed a tutorial that brought up HDMI as an option. I couldn't find the tutorial again but it only fixed the HDMI. I want to use internal audio and headphones but neither work. This is the return from the terminal command:

$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation Atom Processor Z36xxx/Z37xxx Series High Definition Audio Controller (rev 0e)


$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 3: Generic Digital [Generic Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: chtmax98090 [chtmax98090], device 0: Audio (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: chtmax98090 [chtmax98090], device 1: Deep-Buffer Audio (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Thanks for the help

  • What tutorial did you follow? Did you use crouton to install?
    – mchid
    Mar 3, 2019 at 2:51
  • I did not use crouton. I used a bootable usb drive with Ubuntu 18.04 and followed this tutorial for the bios: ifixit.com/Guide/… Mar 3, 2019 at 16:44
  • 1
    Found the tutorial that replaced dummy output with HDMI: linuxuprising.com/2018/06/… Mar 3, 2019 at 16:51
  • I'm working on finding an answer but in the mean time, try plugging in a device to the headphone jack or unplugging and replugging the device to see if that refreshes things for you. I had a dell laptop that would switch to hdmi every time I would plug into and external monitor and would not show any other options until I would plug the headphones in or unplug and replug the headphones in. It seems you have another driver besides the intel one and I found some info but I have to work out some stuff.
    – mchid
    Mar 3, 2019 at 23:10
  • Sorry for the delay. Please take a look here and see if these instructions work: wiki.archlinux.org/index.php/Acer_CB3-131_Chromebook
    – mchid
    Mar 12, 2019 at 6:54

1 Answer 1



git clone https://github.com/plbossart/UCM.git
cd UCM
cp -r chtmax98090/ /usr/share/alsa/ucm/
alsactl store

after reboot sound card should be detected

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