- Mysterious local hostname dhcppc2 mysterious hostname suspected coming from bugs of NetworkManager, turn to WICD, the hazzle gone. But I faced another problem, connection to home wifi router regularly disconnected, every 15 - 20 minuted. I have to recompile several time and reconfigured WICD, no lucks, problem persist. Unmerged WICD back to relly on wpa_supplicant and finally decided to build wpa_supplicant with GUI enabled, thus USE flags, qt5 must be disabled and enable qt4 WPA Gui running smoothly and almost no single problem. I don't think I will connect to wired network with this lappie, thus WPA GUI is suffice. Alternatively I used DHCPCD-UI built with qt4, but this piece of GUI must run as root to work properly in my system. Then I stick with WPA_gui.
- SDDM, LightDM but No KDM By default on Gentoo e-builds, kde-plasma/plasma-meta grab sddm as display manager, with USE flags : consolekit enabled as well as XDM. From some reading, the best way to start a Desktop Environment is the DE itself. In several occasions, Plasma DE did not start after log in, screen just blank and nothing can do, thus I need to log in to terminal either rebooting the machine or start DE manually. It is not the way GUI should working.
by disabled USE Flag : -sddm portage will grab lightDM, nothing wrong with lightDM, but I believed to developer team, by choosing SDDM, they must have good reason. Thus I will stick with SDDM. The solution is to disable consolekit USE flag in merging SDDM and XDM and back to old fashion using startkde ini .xinitrc file .... LOL
I did not read release Note, but do not know the reason they dropped KDM on kde-plasma, KDM is heavy but cool.