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The current kernel version depends on what version of Linux Mint one is using.
For Linux Mint 19 versions, the LTS (long-term-support) kernel is the 4.15 kernel series.
For Linux Mint 20 versions, the LTS (long-term-support) kernel is the 5.4 kernel series.
For Linux Mint 21 versions, the LTS (long-term-support) kernel is the 5.15 kernel series.

Mikael skrev:Gissningsvis beror det på kärnan(?)

Från forums.linuxmint.com

The current kernel version depends on what version of Linux Mint one is using.
For Linux Mint 19 versions, the LTS (long-term-support) kernel is the 4.15 kernel series.
For Linux Mint 20 versions, the LTS (long-term-support) kernel is the 5.4 kernel series.
For Linux Mint 21 versions, the LTS (long-term-support) kernel is the 5.15 kernel series.

bosse skrev:Det var inte helt problemfritt ändå! Varje gång musen ansluter så ändras inställningarna på"pekplattan" Den ändras från av till på enbart för att musen kopplas in. Fattar nada

The default touchpad driver in this edition is "libinput" (provided by the xserver-xorg-input-libinput package).
If you experience problems with it, you can switch to another driver called "synaptics" (provided by the xserver-xorg-input-synaptics package).
To know which driver is used by your input devices, run the following command:
grep -i "Using input driver" /var/log/Xorg.0.log
When both drivers are installed, "synaptics" takes priority.
To switch to the "synaptics" driver, install it with the command:
apt install xserver-xorg-input-synaptics
Then log out and log back in.
To go back to using "libinput", simply remove the "synaptics" driver:
apt remove xserver-xorg-input-synaptics
Then log out and log back in.
Note: You can also try installing the "evdev" driver (provided by the xserver-xorg-input-evdev).

Mikael skrev:Kanske testa att mecka lite angående..
https://linuxmint.com/rel_virginia.php

The default touchpad driver in this edition is "libinput" (provided by the xserver-xorg-input-libinput package).
If you experience problems with it, you can switch to another driver called "synaptics" (provided by the xserver-xorg-input-synaptics package).
To know which driver is used by your input devices, run the following command:
grep -i "Using input driver" /var/log/Xorg.0.log
When both drivers are installed, "synaptics" takes priority.
To switch to the "synaptics" driver, install it with the command:
apt install xserver-xorg-input-synaptics
Then log out and log back in.
To go back to using "libinput", simply remove the "synaptics" driver:
apt remove xserver-xorg-input-synaptics
Then log out and log back in.
Note: You can also try installing the "evdev" driver (provided by the xserver-xorg-input-evdev).