If I open konsole and I maximize the window, the screen become corrupted.
I tryed other programs but I found only konsole give this problem.
After the screen get corrupted, there is no way to restore,
I tryed restarting kwin and xorg, the only way is a reboot.
Maximizing konsole a second time freezes everything,
the only thing I can do is to connect via ssh and doing a reboot that will take longer than usual.
Everyting works fine with compositing off.
The problem started after an upgrade in which I updated many packages,
so I can't figure out what caused the problem, among them there was the kernel and nvidia drivers.