Xubuntu: AL error

[filoe]

Strange, when I restart the computer, it works temporarily, but later (few minutes) gives the error:

shm_open() failed: No such file or directory
AL lib: (WW) alc_initconfig: Failed to initialize backend "pulse"
shm_open() failed: No such file or directory
ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Protocol error
CSCore.SoundOut.AL.ALException: Could not open device "ALSA Default".

Thread started:  #2
Thread finished:  #2
Thread started:  #3
Thread finished:  #3
shm_open() failed: No such file or directory
AL lib: (WW) alc_initconfig: Failed to initialize backend "pulse"
shm_open() failed: No such file or directory
ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: Protocol error

AL lib: (EE) ALCplaybackAlsa_open: Could not open playback device 'default': Connection refused
CSCore.SoundOut.AL.ALException: Could not open device "ALSA Default".
  at CSCore.SoundOut.AL.ALDevice.get_DeviceHandle () [0x00000] in cscore-linux/CSCore/SoundOut/AL/ALDevice.cs:31 
  at CSCore.SoundOut.AL.ALContext..ctor (CSCore.SoundOut.AL.ALDevice device) [0x00000] in cscore-linux/CSCore/SoundOut/AL/ALContext.cs:69 
  at CSCore.SoundOut.ALSoundOut.Initialize (CSCore.IWaveSource source) [0x00000] in cscore-linux/CSCore/SoundOut/ALSoundOut.cs:327 
  at WinformsVisualization.Form1.openToolStripMenuItem_Click (System.Object sender, System.EventArgs e) [0x00000] in cscore-linux/Samples/WinformsVisualization/Form1.cs:70 

[Mr-Crabman]

I've figured out the trigger, this error happens when running the program after using audio in another application, such as a browser video.

How to fix it beyond restarting is another problem.

[JJtheJJpro]

That is strange.