Does X11 work across all linux operating systems? If I code a application that has an X11 window, will it look and operate the same across linux os's or will I have different tweaks I need to perform?Is there an alternative to X11 that is in c/c++ and low-level cross linux platform? *I'm aware of QT and GTK.  What is the lowest level linux graphical system/windowing system?
Is X11 cross-linux-platform and free from platform quirks?
linux;x11