Linux wont launch at all on my 2 Ubuntu kde

[CarlSim]

Greetings all

yesterday,on one of my system,wanted to do a simple refresh reboot and when wanted to launch OBS,only title bar showed up for miliseconds...

this morning,same thing happened on my other setup, just title bar shoed up for few miliseconds.

tried runnind obs on my first machine under sudo,was launching but all my previous settings were gone and no sound at all (no sound bar on obs window.

any others encountered that problem lately ?

 

[CarlSim]

Heres a hint...i had another ubuntu laying in a drawer with obs installed... started it,disabled the update for obs from update manager then started obs and was running. then and let ubuntu do its updates, re started OBS 28.1.2 and nada...just wont start just like my other 2.

so problem is surely related to linux ubutu latest updates...attached is the /var/log/apt/history.log
.........