Created attachment 88050 [details] kde kcrash report. Apparently when network and/or bluetooth mouse is working, after a while the graphical interface freezes. Sometimes few seconds before the freeze you can notice a slow down in the response of the system(kde environment). Ctrl-Alt-Bkspace will not work to restart X. Not sure what is wrong. It may also freeze during a startup after a freeze and several cold strarts are required.
Created attachment 88051 [details] Xorg.log I added the Xorg.log, for reference. Apparently too many services are started, by either kde or mageia(systemd). Seems like a waste of resources. Users should be able to trim down most services that are started by default, which seems to be a general disease of newer systems.
*** This bug has been marked as a duplicate of bug 327075 ***
The crash is a duplicate of bug 327075 (in kscreen). As for the freeze of the X server, please report this issue separately to Xorg developers via https://bugzilla.freedesktop.org/