Ok, I use no plasmoid, so I reinstalled the system with Ubuntu Mate and will try to to the update now.
edit: Mate works, I held these packages:
#!/bin/sh
sudo apt-mark hold x11-apps
sudo apt-mark hold x11-common
sudo apt-mark hold x11-session-utils
sudo apt-mark hold x11-utils
sudo apt-mark hold x11-xkb-utils
sudo apt-mark hold x11-xserver-utils
sudo apt-mark hold xfonts-utils
sudo apt-mark hold xinit
sudo apt-mark hold xserver-xorg-input-mouse
sudo apt-mark hold xserver-xorg-legacy
sudo apt-mark hold xauth
sudo apt-mark hold xbrlapi
sudo apt-mark hold xdg-user-dirs
sudo apt-mark hold xdg-user-dirs-gtk
sudo apt-mark hold xdg-utils
sudo apt-mark hold xinput
sudo apt-mark hold xkb-data
sudo apt-mark hold xorg
sudo apt-mark hold xorg-docs-core
sudo apt-mark hold xserver-common
sudo apt-mark hold xserver-xorg
sudo apt-mark hold xserver-xorg-core
sudo apt-mark hold xserver-xorg-input-all
sudo apt-mark hold xserver-xorg-input-evdev
sudo apt-mark hold xserver-xorg-input-synaptics
sudo apt-mark hold xserver-xorg-input-wacom
sudo apt-mark hold xserver-xorg-video-all
sudo apt-mark hold xserver-xorg-video-amdgpu
sudo apt-mark hold xserver-xorg-video-ati
sudo apt-mark hold xserver-xorg-video-fbdev
sudo apt-mark hold xserver-xorg-video-nouveau
sudo apt-mark hold xserver-xorg-video-radeon
sudo apt-mark hold xserver-xorg-video-vesa
edit: even KDE works, but a little slow
I am not sure if I need to hold all of these packages.
BTW, sleep, resume and sound works!
edit: Mate works, I held these packages:
#!/bin/sh
sudo apt-mark hold x11-apps
sudo apt-mark hold x11-common
sudo apt-mark hold x11-session-utils
sudo apt-mark hold x11-utils
sudo apt-mark hold x11-xkb-utils
sudo apt-mark hold x11-xserver-utils
sudo apt-mark hold xfonts-utils
sudo apt-mark hold xinit
sudo apt-mark hold xserver-xorg-input-mouse
sudo apt-mark hold xserver-xorg-legacy
sudo apt-mark hold xauth
sudo apt-mark hold xbrlapi
sudo apt-mark hold xdg-user-dirs
sudo apt-mark hold xdg-user-dirs-gtk
sudo apt-mark hold xdg-utils
sudo apt-mark hold xinput
sudo apt-mark hold xkb-data
sudo apt-mark hold xorg
sudo apt-mark hold xorg-docs-core
sudo apt-mark hold xserver-common
sudo apt-mark hold xserver-xorg
sudo apt-mark hold xserver-xorg-core
sudo apt-mark hold xserver-xorg-input-all
sudo apt-mark hold xserver-xorg-input-evdev
sudo apt-mark hold xserver-xorg-input-synaptics
sudo apt-mark hold xserver-xorg-input-wacom
sudo apt-mark hold xserver-xorg-video-all
sudo apt-mark hold xserver-xorg-video-amdgpu
sudo apt-mark hold xserver-xorg-video-ati
sudo apt-mark hold xserver-xorg-video-fbdev
sudo apt-mark hold xserver-xorg-video-nouveau
sudo apt-mark hold xserver-xorg-video-radeon
sudo apt-mark hold xserver-xorg-video-vesa
edit: even KDE works, but a little slow

I am not sure if I need to hold all of these packages.
BTW, sleep, resume and sound works!
