Yep couple of issues in Krita when in Linux vs. Windows7
1) Dual-Displays - 22" displays in Linux maps tablet across both displays so only half of the digitizer is in Krita.
2) Left-handed - Yep left-handed so no way in Linux to map for left-handed unless you want to do scripts using xsetwacom and startup scripts and such.
3) Buttons same issue as in 2 above archaic guessing finding detecting and writing script values to get to work.
And still to this day haven't put in the grunt work to figure out and make scripts and all that in Linux side.
As easier to just boot up to windows side.
Windows side has a utility that does all the above. Mapping digitizer surface,Stylus Pin Buttons assignment,Tablet Buttons assignment,Right or Left handed assignment.
And yep it was cheap picked up on Ebay for $48 shipped. But still going strong. But be careful of usb cable hear people having issues with breakage with too much flexing use. But hey good start and if I get more serious and need more serious tools than will migrate to Wacom tablets when need and monies become available.