@barolo @sk8geek @mschilli87 @Vtec234 Please test this PR if possible.
Test with a mouse that has the Sensitivity (DPI) setting, such as the MX Master 3 or the MX Vertical.
These mice should have a DPI Sliding Adjustment. If the mouse has a DPI Switch key, the choices should be Off and DPI Switch. If the mouse does not have this key, the choices should be Off and the keys that can send raw xy mouse movements. For the MX Master 3 they are middle, back, forward, gesture, and smart shift.
Change the setting to one of the keys. Click the button, move the mouse an inch or two, and release the button. The mouse pointer should not move. As the mouse moves notifications showing a DPI value should appear. When the mouse is released the Sensitivity (DPI) value should be changed to this value and the sensitivity of the mouse should change.
Note: If you go back to a previous version of Solaar you may encounter errors on startup. Go in to ~/.config/solaar/config.json and remove the dpi-sliding value to fix this issue.