KDE

If you’re using Manjaro KDE and rely on Dropbox AUR for file syncing, you might have encountered a frustrating issue where the Dropbox tray icon perpetually shows “connecting” while the app itself works and syncs files perfectly in the background. After spending considerable time experimenting with various solutions, I finally found a fix that resolves this issue. The Issue After installing the Dropbox AUR package on my Manjaro KDE system, everything seemed to work fine except for the tray icon. It kept displaying “connecting” indefinitely. This was annoying because it made it hard to quickly check the sync status of my files without opening the main application window. ...

TL;DR Generate a modeline with cvt, add it with xrandr --newmode / --addmode, then enable it on your output. Session-only changes vanish on reboot and never fix the login screen. On KDE/Kubuntu with SDDM, put the same commands in Xsetup so they run before the greeter. After I switched from GNOME/Unity to KDE, SDDM would not pick up my ultrawide panel. It stuck at Full HD instead of 2560×1080. I had hit the same class of problem earlier on Ubuntu with an older monitor whose native mode never showed up in the display settings. ...