Hello.

I was having this issue where the brush was offset with the cursor inside the drawing window, and it hovered a good 40 or so pixels above it, becoming more severe as I moved down. I couldn't even reach the bottom of the drawing window with my brush, because the cursor would simply arrive at the bottom scroll bar. This only happened inside the drawing viewport, and only when using my pen; mouse input, as well as touch input from the same tablet, didn't trigger this offset.

Keep in mind that we're talking about a clean machine here, I just reinstalled windows, and before I did, I had the exact same problem.

At first I thought it was some sort of conflict between the graphics cards, since I have an integrated intel one, and an NVidia one, but I gave up on that idea after experimenting with many different combinations of opengl and DX, as well as wintab and qt, windows ink off and on. Selecting my resolution with the shift startup menu didn't work either. I updated my drivers (both), and still nothing. No scaling enabled, no wacom properties I could tweak, no nothing, even with radically different resolutions from my native one, the problem persisted.

At this point, I had tried everything, and was about to quit and go back to my photoshop(tm) to enjoy my no animation features, since it (and all the other applications I used, including many with OpenGL viewports, which I assume is what the krita drawing window is), worked perfectly fine without any sort of offset. Then I decided to try and bruteforce a solution by tweaking the resolution numbers in the shift-menu-thingy at the start, unsure if it would work or not, and it actually did! So now I'm working on a 1366 by 768 monitor, with a krita resolution of 1366 by 854 (I looked up a common monitor dimension to get that result), and it seems to be pretty well align. The big question is why.

Is it a bug, or are we really supposed to tweak the krita resolution values in these cases? I found nothing about this, and the only mention I saw of the shift-menu was in regards to dual monitors, so if anyone could shed some light on why this is working with a completely different resolution, I'd be thankful.

Here are my specs (It's a laptop, by the way):
Display: 1366 X 768 (single)
Graphics: Intel HD Graphics 620, NVidia GTX 950M
Processor: i7 7500U
Tablet: Wacom Intous art (medium)
Driver: 6.3.30-2 (only tested with this one)
Krita: 4.0.3, 4.0.1 (only tested these ones, both presented the same problem)

So yeah, thank you in advance, and if anything else is needed, let me know.

The dimensions of the Intuos Art active area are 216 by 135mm, a ratio of 1.6. The "working number" you cite is actually your monitor width divided by that ratio, 1366/1.6, to get the monitor height 853.75. Basically you've manually mapped your tablet active area to your monitor's area and that is probably fine. I can't answer why the tablet driver doesn't manage it automatically.

This sounds like the HiDPI canvas problem, which can be resolved by going to settings->configure Krita->general->window settings->Enable Hi-DPI support.

If that is not it, then it's this:
https://docs.krita.org/en/KritaFAQ.html ... on-windows

TheraHedwig wrote:This sounds like the HiDPI canvas problem, which can be resolved by going to settings->configure Krita->general->window settings->Enable Hi-DPI support.

If that is not it, then it's this:
https://docs.krita.org/en/KritaFAQ.html ... on-windows

Hi-DPI doesn't fix it, and neither does the second thing. I can test on 3.3.3, if you think it'd be relevant.

And if you're wondering, my tablet screen mapping is set up properly for my resolution.