[Solved] Fixed low screen resolution with Nvidia driver

My monitor supports 1920x1280 dpi and is fine with the nouveau driver. After changing to the nvidia driver, KDE says “1024x768 is the only resolution supported by this display”. Also opening files is exceedingly slow, whereas browsers and other applications seem fast and smooth. How might I fix the display problem?

Edit:
Searching the Arch Forums I came across a solution:
" Enabling the DRM kernel mode setting, by adding
nvidia-drm.modeset=1
as a kernel parameter has fixed the problem."