How to Install KDE Plasma on Linux Mint

Linux Mint no longer ships a dedicated KDE edition, but KDE Plasma is still a practical replacement when Cinnamon feels too rigid or you want stronger multi-monitor tools, deeper theming, and a more configurable workspace. You can install KDE Plasma on Linux Mint from the default repositories instead of hunting down a separate download or moving to another distribution.

Linux Mint 22.x currently pulls Plasma 5.27.x and Linux Mint 21.x pulls Plasma 5.24.x from the Ubuntu base, so the sensible route is the tested default-repository install rather than chasing Plasma 6 packages or adapting LMDE steps. That path lets you pick a lean Plasma shell or a fuller KDE desktop, keep Cinnamon available through LightDM if you want a fallback, and switch display managers later if SDDM does not become active during installation.

Understand KDE Plasma Availability on Linux Mint

Linux Mint uses Ubuntu as its package base, which determines which Plasma version you receive from the default repositories. Before installing, confirm your Mint version so you know what to expect:

Linux Mint Version	Ubuntu Base	Plasma Version (Default Repos)	Support Until
Linux Mint 22.x (Wilma, Xia, Zara, Zena)	Ubuntu 24.04 LTS (noble)	Plasma 5.27.x	June 2029
Linux Mint 21.x (Vanessa, Vera, Victoria, Virginia)	Ubuntu 22.04 LTS (jammy)	Plasma 5.24.x	June 2027

Plasma 5.27 (available on Mint 22) includes significant improvements over 5.24, including better Wayland support, a revamped System Settings interface, and improved multi-monitor handling. Both versions provide a fully functional KDE desktop experience.

Yes, Linux Mint 22.x and 21.x support KDE Plasma from the default repositories, but the packaged desktop is still on the Plasma 5 series rather than Plasma 6. LMDE uses Debian packages instead, so it needs a separate Debian-focused workflow instead of the Ubuntu-based Mint steps here.

Install KDE Plasma from Default Repositories

Installing from Linux Mint’s default repositories gives you a stable KDE Plasma setup without adding third-party package sources. Mint pulls these packages from the Ubuntu universe component that is already enabled on standard Linux Mint desktop installs, so the same path also keeps updates inside the normal Mint update flow.

Update Linux Mint Before Installing KDE Plasma

Before installing KDE Plasma, update your system to ensure you have the latest security patches and package versions. This prevents dependency conflicts during the desktop environment installation:

sudo apt update && sudo apt upgrade -y

These commands use sudo for system changes. If your account is not in the sudoers file yet, follow the guide on how to create and add users to sudoers on Linux Mint or run the commands from an administrator account.

Check for Existing KDE Plasma Packages

Before proceeding, verify that KDE meta packages are not already installed on your system:

dpkg -l | grep -E '^ii.*(kde-plasma-desktop|kde-standard|kde-full)'

If the command returns any results showing installed packages, Plasma is already on your system and you can skip to the SDDM configuration section. An empty output means no KDE meta packages are installed.

If you do not use text filters often, the grep command in Linux guide shows how grep narrows the dpkg -l output to just the KDE packages you want to inspect.

Compare KDE Plasma Package Profiles on Linux Mint

These three KDE meta packages cover the usual Linux Mint setups, from a lean VM install to the full KDE application stack:

Use Case	Meta Package	What You Get
Minimal install for VMs or custom setups	kde-plasma-desktop	Plasma shell, KWin, System Settings, and the core desktop pieces without the broader KDE application set.
Balanced daily-driver desktop	kde-standard	Adds Dolphin file manager, Konsole terminal, Discover, Gwenview, and the core KDE frameworks most Mint users expect.
Complete KDE workflow	kde-full	Pulls in KDE PIM, Calligra, educational packages, games, and the wider Kubuntu application stack.

For most users, kde-standard is the balanced choice because it adds the everyday KDE tools without pulling in the full Kubuntu software stack.

To preview exactly what packages will be installed and see the precise disk space requirement for your system, run a simulation with the -s flag:

sudo apt install -s kde-standard

Substitute kde-plasma-desktop or kde-full to preview those options instead. The simulation shows the full package list and disk usage without making any changes to your system.

Install the KDE Standard Profile on Linux Mint

The standard profile is the best fit for most Linux Mint systems because it installs the core KDE applications without dragging in every optional package.

sudo apt install kde-standard -y

This command installs Dolphin, Konsole, Discover, Gwenview, and the core KDE frameworks that power widgets, activities, and Plasma’s customization features. If the package installer asks which display manager to use, choose SDDM for the most KDE-native login screen. If no prompt appears or LightDM remains active after reboot, switch to SDDM later with sudo dpkg-reconfigure sddm.

Install the KDE Minimal Profile on Linux Mint

For a lighter installation suitable for virtual machines or custom setups where you want to choose your own applications:

sudo apt install kde-plasma-desktop -y

This deploys only the Plasma shell, KWin window manager, and System Settings without bundled applications. You will need to install a file manager, terminal emulator, and other utilities separately.

Install the Full KDE Profile on Linux Mint

For the complete KDE experience with all default applications:

sudo apt install kde-full -y

This includes KDE PIM (KMail, KOrganizer, Kontact), Calligra office suite, educational apps, games, and every utility shipping with Kubuntu. Choose this option if you want the full KDE ecosystem and have sufficient disk space.

Configure SDDM for KDE Plasma on Linux Mint

If the installer asks which display manager to use, that choice controls which login screen handles your KDE Plasma sessions. Linux Mint users usually narrow the decision to these two options:

Display Manager	Best For	Advantages	Considerations
SDDM	Dedicated KDE Plasma users	Native KDE integration, better theme support, modern features	Additional package to maintain, designed specifically for KDE
LightDM	Multi-desktop setups	Linux Mint default, lighter resource usage, works with all desktops	Less polished with KDE themes, fewer Plasma-specific features

For most Linux Mint systems, SDDM is the better match because it integrates cleanly with Plasma’s theming and session handling. Keep LightDM if you switch between Cinnamon and Plasma often or you prefer Mint’s default login screen.

To proceed with SDDM in the terminal dialog, press the TAB key to highlight <Ok>, then press ENTER.

Fix the KDE Plasma Virtual Keyboard Bug in Linux Mint VMs

In some virtual environments, especially after you install VirtualBox on Linux Mint or run Mint under VMware or QEMU, a bug can cause the SDDM login screen to display only a large on-screen keyboard after rebooting, making it impossible to log in normally. To prevent this issue, create an SDDM drop-in configuration before rebooting:

sudo mkdir -p /etc/sddm.conf.d
printf "[General]\nInputMethod=\n" | sudo tee /etc/sddm.conf.d/virtualkbd.conf

The first command creates the configuration directory if it does not exist. The second command writes a drop-in file that sets InputMethod= to empty, which disables the virtual keyboard; sudo tee is used because plain > redirection would still try to write the file as your regular user. SDDM automatically loads configuration files from /etc/sddm.conf.d/ even when the main /etc/sddm.conf file does not exist, so this approach works without generating the base configuration manually.

This fix is only necessary if you are running Linux Mint inside a virtual machine. If you are installing on physical hardware, you can skip this step.

Reboot Linux Mint and Verify KDE Plasma

Once the installation completes, reboot your system to apply the desktop environment and display manager changes:

sudo reboot

After restarting, you will arrive at the login screen. If you selected SDDM, you should see the KDE-themed login interface. If LightDM remained the default, Plasma still appears in the session chooser.

Select the KDE Plasma Session on Linux Mint

Before entering your credentials, ensure KDE Plasma is selected as your desktop session:

1. Click the session selector (gear icon or dropdown menu) typically located in the bottom-left corner of the SDDM login screen or top-right corner on LightDM.
2. Select “Plasma” or “Plasma (X11)” from the list. If you want to try Wayland, select “Plasma (Wayland)” instead.
3. Enter your username and password to log in.

Your selection is remembered for future logins, so you only need to choose the session once unless you want to switch between desktops.

Verify KDE Plasma Installation on Linux Mint

After rebooting, confirm that the Plasma package and session file are present before you start customizing the desktop:

dpkg-query -W -f='${Version}\n' plasma-desktop
ls /usr/share/xsessions | grep plasma

Expected output on Linux Mint 22.x:

4:5.27.12-0ubuntu0.1
plasma.desktop

Expected output on Linux Mint 21.x:

4:5.24.7-0ubuntu0.1
plasma.desktop

The first line confirms which Plasma package version Mint installed, and plasma.desktop confirms the login manager can offer a Plasma session. Package revisions can increase after later Ubuntu updates, but Mint 22.x should stay on the 5.27 branch and Mint 21.x on the 5.24 branch. If you are already inside a local Plasma session, you can open Konsole and run plasmashell --version as an extra check.

Switch Between SDDM and LightDM on Linux Mint

If you need to switch back to LightDM for Cinnamon or reselect SDDM for Plasma later, you can reconfigure the default display manager at any time.

Reconfigure the Default Linux Mint Display Manager

Open a terminal and run the reconfigure command:

sudo dpkg-reconfigure sddm

A dialog appears listing all installed display managers. Use the arrow keys to select your preferred option and press ENTER. After making your selection, reboot to apply the change:

sudo reboot

Once restarted, your system uses the newly selected display manager.

Troubleshoot KDE Plasma on Linux Mint

Most post-install problems come from the display manager, missing session files, or a damaged Plasma profile, so start with those checks before reinstalling the whole desktop.

Fix a KDE Plasma Login Screen That Shows Only the Virtual Keyboard

If the SDDM login screen displays only a large on-screen keyboard with no option to type your password normally, the virtual keyboard bug is affecting your system. This typically happens in virtual machines.

To fix this, switch to a text console by pressing Ctrl+Alt+F3, log in with your username and password, then run:

sudo mkdir -p /etc/sddm.conf.d
printf "[General]\nInputMethod=\n" | sudo tee /etc/sddm.conf.d/virtualkbd.conf
sudo reboot

After rebooting, the login screen should display the normal password field.

Fix a Missing KDE Plasma Session at Linux Mint Login

If “Plasma” does not appear in the session selector at the login screen, the session files may not have been installed correctly. Verify the installation by checking for the session file:

ls /usr/share/xsessions/ | grep plasma

Expected output:

plasma.desktop

If the file is missing, reinstall the plasma-desktop package:

sudo apt install --reinstall plasma-desktop

Fix KDE Plasma Crashes After Linux Mint Login

If Plasma crashes immediately after login or you see a black screen, a corrupted configuration file may be the cause. Switch to a text console with Ctrl+Alt+F3, log in, and rename your Plasma configuration directory to reset settings:

mv ~/.config/plasma-org.kde.plasma.desktop-appletsrc ~/.config/plasma-org.kde.plasma.desktop-appletsrc.backup
mv ~/.config/kwinrc ~/.config/kwinrc.backup

Then switch back to the graphical login with Ctrl+Alt+F1 and try logging in again. If the crashes happen on AMD or Intel graphics, it is also worth checking whether you need to upgrade Mesa drivers on Linux Mint before rebuilding the Plasma profile.

Remove KDE Plasma from Linux Mint

If you decide to remove KDE Plasma and return to your previous desktop setup, follow these steps to cleanly uninstall all components.

Switch Back to LightDM Before Removing KDE Plasma

Before purging KDE components, return the system to Mint’s default display manager (LightDM) so the login screen still works after Plasma is removed:

sudo dpkg-reconfigure lightdm
sudo systemctl enable lightdm
sudo systemctl disable sddm

After selecting LightDM in the dialog, verify the change took effect:

cat /etc/X11/default-display-manager

Expected output:

/usr/sbin/lightdm

Only proceed with removal once this file shows the correct display manager.

Uninstall KDE Plasma Packages on Linux Mint

Remove the KDE meta packages and core components. This command covers all three installation profiles:

sudo apt purge kde-standard kde-plasma-desktop kde-full plasma-desktop sddm -y

After the meta packages are removed, clean up orphaned dependencies:

sudo apt autoremove --purge -y

Remove Leftover KDE Applications from Linux Mint

The autoremove step may still leave standalone KDE applications behind. Check for the most common packages before deciding whether you want to purge them too:

dpkg -l | grep -E '^ii.*(konsole|dolphin|okular|gwenview|kate|ark|kwrite)'

If the command shows installed KDE applications and you do not want to keep them, remove them individually:

sudo apt purge konsole dolphin okular gwenview kate ark kwrite -y
sudo apt autoremove --purge -y

Remove KDE Plasma Configuration Files on Linux Mint

The following commands permanently delete KDE Plasma configuration files, including customized panel layouts, widget settings, and application preferences. If you might reinstall Plasma later and want to keep your settings, skip this step.

To fully clean up user-level configuration files:

rm -rf ~/.config/kde* ~/.config/plasma* ~/.config/kwin* ~/.local/share/kded5 ~/.local/share/plasma*

Verify KDE Plasma Removal on Linux Mint

Confirm KDE Plasma has been fully removed:

dpkg -l | grep -E '^ii.*plasma'

No output means the remaining installed package list no longer contains Plasma packages. Reboot to complete the change:

sudo reboot

After restarting, your system will boot into the Cinnamon desktop with LightDM as the login screen.

Install KDE Plasma Using Software Manager

If you prefer a graphical installation method instead of terminal commands, Linux Mint’s Software Manager provides a straightforward alternative. However, this method installs only the minimal kde-plasma-desktop package.

1. Open Software Manager from the application menu or by searching for “Software Manager” from the Mint menu.
2. Search for “KDE Plasma Desktop” using the search bar at the top.
3. Select the “KDE Plasma Desktop” package from the search results.
4. Click the “Install” button and enter your password when prompted.
5. Choose SDDM or LightDM when Software Manager prompts you to pick a display manager.

When Software Manager finishes, log out or reboot, then select “Plasma” from the session chooser at the login screen. If you want the additional applications included in kde-standard or kde-full, use the terminal installation method instead.

Official KDE Resources

For further information, updates, and community support related to KDE Plasma:

• KDE Plasma Desktop – Official Plasma homepage with feature highlights and the latest release information.
• KDE Community Wiki – Documentation, development resources, and community discussions.
• KDE UserBase Plasma Documentation – User-focused guides for configuring and customizing Plasma.

Conclusion

KDE Plasma is now installed on Linux Mint with the package profile and display manager you chose, so you can keep Cinnamon as a fallback or settle into a full KDE workflow. If graphics issues show up after the switch, review how to install NVIDIA drivers on Linux Mint or how to upgrade Mesa drivers on Linux Mint before rebuilding your Plasma profile.