[SOLVED] Output sound suddenly lost

[vincen]

Hi

Running Kubuntu 18.04 since a little while and everything working fine so far excepted one sudden problem. Most of time I'm using my laptop (Clevo) with some USB speakers so not using internal audio sound card but till few days ago the internal sound card was working perfectly ! Yesterday I unplugged my USB speakers as I was going to move of room and then impossible to get sound through the internal audio sound card of the laptop In fact I noticed the internal audio output has disappeared of audio settings ! I still have the internal input audio but not output ! For output now I can only select the HDMI way out, no more speakers output !!
At first I thought the audio card had died but in that case I guess the input would have too disappeared. I played a little with all audio settings hoping to get that output back but no way !
I then started with a live USB key and then no problem I could get some audio through the internal audio card !
So it's definitively a glitch in my current setup but not sure where to investigate first for that ! Is it a separate module for input and output of audio card ?

Thanks for help and suggestions,

Vincèn

[vincen]

Very strange, problem disappeared magically as it had appeared hope it won't come back, sorry for noise !