How to install Davinci Resolve manually from install package
0. Download the package from blackmagicdesign.com, you can provide fake registration info and that form will eat it successfully, so...
1. Run DaVinci_Resolve_XX.X_Linux.run package.
2. Install just as it tells you.
3. You may run into "error looking up symbols" whenever you run "/opt/resolve/bin/resolve" so simply move those 4 libraries into "disabled" folder, with this step Davinci Resolve will use system libraries and should run:
sudo mkdir /opt/resolve/libs/disabled
sudo mv /opt/resolve/libs/libglib* /opt/resolve/libs/disabled/
sudo mv /opt/resolve/libs/libgio* /opt/resolve/libs/disabled/
sudo mv /opt/resolve/libs/libgmodule* /opt/resolve/libs/disabled/
sudo mv /opt/resolve/libs/libgoobject* /opt/resolve/libs/disabled/
4. You may notice that the fonts are particularly small. The UI scaling is locked to three options: 100%, 150%, and 200%. These options might not be suitable for you. Therefore, leave it at 100% in preferences and run Resolve with the following command:
QT_FONT_DPI=110 QT_ENABLE_HIGHDPI_SCALING=1 /opt/resolve/bin/resolve
This will run with 110% UI scaling, so finetune QT_FONT_DPI to your liking.