Download the required desktop environment
pacman -S deepin deepin-extra
Modify/etc/lightdm/lightdm.conf
sudo nano /etc/lightdm/lightdm.conf
greeter-session=lightdm-deepin-greeter
It is important to note that the upper part of the file is a description of the option, and the lower half is an example of the option
Suggest the upper part of the instructions do not move, modify the bottom half of the options on the line (according to the rules, clean and tidy), remove the option # can
Disable SDDM (I am installing the KDE version initially)
systemctl disable sddm
Enable LIGHTDM
systemctl enable lightdm
Restart
reboot
Uninstall KDE companion tools (optional)
The default KDE environment installs a number of corresponding tools, many with Deepin tool functions, such as terminal (KDE konsole and Deepin deep terminal), can be uninstalled once, need to install once again (see Arch KDE)
pacman -Rsc plasmapacman -Rsc kde-applications
After the completion of the Deepin launcher is much more refreshing.
Summarize
In the process of looking for KDE services, spent a lot of time, mainly do not know where to start, several times to see the simple desktop display manager, but did not care, still in the major forums to find relevant information, accidentally in the arch display In the manager's documentation, it is found that KDE corresponds to SDDM (Deepin corresponds to LIGHTDM). It is only here that each desktop environment corresponds to a display manager. Sure enough, there are a few problems on the Internet, see if you can find how to use
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Links: https://www.jianshu.com/p/a1e31a9a50dc
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Manjaro Replace Deepin Desktop Uninstall ked desktop