From the project's git repository:
- Kmscon is a simple terminal emulator based on linux kernel mode setting. It is an attempt to replace the in-kernel VT implementation with a userspace console.
Kmscon can function as a drop-in replacement for the in-kernel linux-console. Features include:
- Full vt220 to vt510 implementation.
- Full internationalization support:
- Kmscon supports printing full Unicode glyphs, including the CJK ones.
- Kmscon provides internationalized keyboard handling through libxkbcommon, thus allowing it to use the full range of keyboard layouts supported in X keyboard.
- Hardware accelerated rendering.
- Multi-seat capability.
pam_securettymodule by removing or commenting out the corresponding line in
Despite its name, KMS is not a hard requirement for kmscon. Kmscon supports the following video backends: drm3d (Linux DRM hardware-rendering backend), drm2d (Linux DRM software-rendering backend), superseded fbdev (Linux fbdev video backend). Make sure one of them is available on your system.
Install theAUR package or the AUR package for a development version. Alternatively, install AUR. The patched version, along with its patched dependency ( AUR), includes fixes and improvements (like 24-bit color support) that the canonical version (which has not been updated since 2014) does not.
Normally, there is a special systemd configuration for tty1. To be conservative, you can continue to run the traditional agetty on tty1 and only run kmscon on all the other virtual terminals. Or you can run kmscon on both tty1 and the other VTs.
To enable kmscon on all virtual terminals, run:
# ln -s /usr/lib/systemd/system/kmsconvt\@.service /etc/systemd/system/autovt\@.service
This will make
kmsconvt@.service instead of
getty@.service for new VTs. Additionally, all other systemd units that use
getty@.service will not be affected by this change.
If kmscon cannot start for whatever reason, this unit will cause
getty@.service to be started instead. Furthermore, if no VTs are available, this unit will not start anything.
Kmscon supports rendering CJK characters through the default font engine. However, has to be globally configured to map the monospace font alias to proper CJK fonts. For Chinese users, the following template is provided and proved to result in satisfactory Chinese characters rendering:
<?xml version="1.0"?> <!DOCTYPE fontconfig SYSTEM "fonts.dtd"> <fontconfig> <match> <test name="family"><string>monospace</string></test> <edit name="family" mode="prepend" binding="strong"> <string>DejaVu Sans Mono</string> <string>WenQuanYi Micro Hei Mono</string> </edit> </match> </fontconfig>
Alternatively, we can add the following line to
/etc/kmscon/kmscon.conf for globally configuring kmscon using the fonts:
font-name=DejaVu Sans Mono, WenQuanYi Micro Hei Mono font-size=14
You need to haveand , both available from the official repositories, installed.
Problems with switching between Xorg and kmscon
You may want to add
/etc/kmscon/kmscon.conf if you have problems with switching between Xorg and kmscon. The file and folder are not part of the package and therefore have to be created manually. Another possibility would be editing the systemd service file.
No audio control
Vim does not clear terminal output
Vim might open without clearing the terminal output, it is still possible to edit the file but the text will not be visible until it is changed. As a workaround, try setting the environment variable
TERM=vt220. Alternatively, another vim-like editor like or Neovim might work.
TERMis set to
It is possible to login the user automatically without asking for password by adding this to
# Modify this command to do what you need # Example: Login an user asking for user and password login=/bin/bash --login # Example: Login an user without asking for password login=/bin/bash -c su <your_username>
You can change font size on the fly with
Ctrl+- shortcuts. Also you can set 'font-dpi' and 'font-size' in
/etc/kmscon/kmscon.conf e.g. 'font-dpi=288' 288 is 96 * 3 that is 300% scaling. 96 is default.