It’s rare to use renoise with tablet but I just wanted to report that while using my bamboo, macro/doofer knobs jumps rapidly to the maximum/minimum values. Sliders works fine.
forgot the specs:
Windows7 x64, Renoise x64, Bamboo Pen CTL-460 driver 5.3.3-3
P.S. Anyone with a diffrent tablet could confirm?
P.S.2 Is there a chance to switch (preference maybe?) to sliders like the rest of UI or You think of more uses of knobs in future? Its not consistent right now and as I said before I dont have any problems with sliders.
https://forum.renoise.com/t/why-buttons-and-not-sliders-and-only-on-some-devices/40685
Confirm! It is really impossible to control the knobs with a pen 
(at least the macro knobs can be controlled with the sliders below the instrument list now, but it spoils the fun with doofers a lot)
weizenkeim: Thanks for confirmation.
I hope it will be fixed in future renoise bug release.
Same problem here. ( OSX )
Ableton Live has this:
https://www.ableton.com/answers/how-can-i-use-a-wacom-tablet-with-live
-absoluteMouseMode
The doofer uses the rotary encoder, so it accepts relative input.
Over controllers like the XY-pad, and sliders work with absolute values, so simply use that instead, besides a graphics tablet Is arguably the best XY-pad you can get.
Since more and more I use tablet, i wanted to know is there a chance to fix/workaround this issue in 3.0.1 ?
fixed on macros (disable mouse warping) in redux 1.0.0 so I assume its fixed 