I found a solution that works for me.
I'm using Windows 10, Inkscape version 0.92.2 and an Intuos3 tablet.
First I confirmed that my Intuos3 had the latest driver.
Then opened Wacom Tablet Properties -> About -> Diagnose and confirmed that the Pressure readout increased above 0% when I used the pen on the tablet. All good!
Next I installed Gimp, confirmed that pressure sensitivity was being rec'd by Gimp.
Then in Inkscape, click Edit -> Input Devices and notice that only "Core Pointer" is being shown. I did some Googling on this, and found the missing link:
In Inkscape -> Edit -> Preferences -> Input/Output -> Input Devices, check the "Switch tool based on tablet device". ("Use pressure-sensitive tablet" was already checked for me.)
Go back to the Input Devices sidebar, click on each of "WACOM Tablet", "WACOM Tablet Eraser" and "WACOM Tablet Pressure Stylus" and be sure each is set to Mode=Screen
After this, pressure sensitivity worked for me immediately, but I suppose you may want to restart. I also found there's not advantage to starting Inkscape with the tablet; starting with the mouse works fine!
Cheers,
Uncle Vinny
