unity - "cannot open mixer: No such file or directory" when trying to run alsamixer to unmute after installing Realtek audio driver - Ask Ubuntu


i'm using ubuntu 16.04 on dell inspiron 5568 15", sound quality lower 1 on windows session.

then searched solution , downloaded rt-linux-hdaudio-5.18 realtek here

i did steps written in readme.txt inside :

step 1. unzip source code

    tar xfvj alsa-driver-1.0.xx.tar.bz2

step 2. complied source code

cd alsa-driver-1.0.xx ./configure --with-cards=hda-intel make make install

step 3. reboot machine

step 4. use alsamixer disable mute (all audio line default mute) excute alsamixer

the problem is, when restarted computer found sound disabled , couldn't run alsamixer in terminal fix said in step 4. error : 

cannot open mixer: no such file or directory

this picture give additional information

  • this driver outdated , uninstall running cd alsa-driver-1.0.xx make uninstall , reboot , hope uninstall works fine , previous driver.
  • sound better in windows because driver includes builtin (and hidden) sound enhancer suitable small laptop loudspeaker : can have not-so-bad similar effect using pulseaudio equalizer , see here

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