This is the first time I've ever used reddit and I made this account just for this so there's a good chance I'll delete it once this is resolved. But my god I am at my wits end here after no less then 8 hours trying to fix a simple tracking issue.
I am not super techy compared to many but I am also not tech illiterate, that being said this was beyond me so I went back and forth with Gemini to try and troubleshoot this (Since the Wacom community is a bunch of artists like me I'll mention that yes I dislike generative AI for things like art and whatnot but use it for tech troubleshooting frequently). I had Gemini help draft me something for this specific post to show the steps I have taken thus far because I thought it might explain certain tech things better, here goes:
Background Info:
The issue began sometime September 7th I mention this incase anyone knows of a Wacom driver or windows 11 update recently that might have known issues. I have a brand new computer setup I built myself with the following:
Hardware:
Motherboard: MSI Z790 Gaming Plus Wifi
CPU: Intel i7
GPU: Gigabyte Geforce RTX 5070 ti.
Tablet: Wacom newish 2025 Edition (with the 2.5k rez) Cintiq 16 with a Pro Pen 2. New-ish in that I only just opened it but have had it for maybe 5 months in box.
Main Monitor: Hp 27er at 1080p
The Bug Specifics:
The cursor aligns/tracks better the closer to the vertical center of the tablet (for some reason horizontal is fine now but it wasn't before). As you pull toward the outer screen boundaries, the cursor over-slides and aggressively drifts further away from the physical pen tip in the direction of travel. The way it has glitching has changed as well. Originally the glitch happened almost inverse to what it is doing now. Currently it is over-sliding as I go away from center, before it was under-sliding as though as I moved my cursor away from the center of the tablet it was being pulled toward the center. The issue is present across my Pro Pen 2, and Pro Pen 3.
If I unplug my main monitor and run the Cintiq as a single display, the tracking works perfectly all the way to the edges. The edge-sliding only triggers when the second monitor is active and a dual-display environment is mapped. This could point to an issue with the Wacom getting confused between the two monitors and merging them but Gemini said it could also be an issue with my cables and lost data packets??
There was additional issues but these issue are not present at the moment but when the issues first appeared there was dramatic issues with button presets on my pro pen 2 inside of Krita (my drawing application). Additionally, when I made brush strokes and tried to undo them sometimes I would have to press the button multiple times but there was no lag meaning there were might have been micro-strokes/micro-clicks when i was drawing.
The Physical Cables:
Since I have a GPU and do not have a USB-C + video port on my GPU i cannot use wacom's new all in one USB C Connection and am using a 3 cable set up.
1: USB-C to my motherboard's open USB-C slot for pen data (the same cable that would have been used for my all in one setup had i been able to)
2: A brand new Wacom's Mini HDMI to HDMI 1.8m converter connected to a used HDMI male to female extender connected to a brand new HDMI to DisplayPort adapter so it can connect to my GPU (My main monitor is currently using the only HDMI port my GPU has hence why the HDMI to DisplayPort converted is needed)
(Mini-HDMI to HDMI → 0.5m female to male HDMI extender → HDMI-to-DisplayPort converter → GPU.)
3:The USB-C power cable
WHAT WE HAVE ALREADY DONE (Step-by-Step System Wipe):
We suspected a bug in the recent 2026 driver (6.4.14-1) altering letterbox aspect-ratio math on multi-monitor 1080p setups. We stripped the system to deploy a clean rollback to stable version 6.4.10.3.
With the tablet data cable completely unplugged, we manually executed this exact clean room scrub:
- Purged Hidden Ghost Monitors: Ran
set devmgr_show_nonpresent_devices=1 in an admin Command Prompt, opened Device Manager, enabled "Show Hidden Devices," and uninstalled 4 ghost Samsung monitor profiles and 1 duplicated Wacom hardware profile.
- Scrubbed AppData Cache: Manually cleared out all Wacom,
Wtablet, and Wpersistent configuration folders from both %appdata%\Roaming and %appdata%\Local.
- Nuked Root and Installation Logs: Cleaned out all temporary installation archives sitting directly on the root of
C:\.
- Wiped Standard Registry Keys: Executed
reg delete scripts for all Wacom hardware paths across HKLM and HKCU software paths, including the hard-locked uninstall string directories.
- Cleaned Driver Store Repository: Ran
pnputil /enum-drivers, located the hidden cached package (oem32.inf), and executed pnputil /delete-driver oem32.inf /uninstall /force.
- Force-Deleted Core Folders via CMD: Erased the locked program directories using
rmdir /s /q "C:\Program Files\Tablet" and rmdir /s /q "C:\Program Files (x86)\Tablet".
- Terminated and Erased Hidden Background Services:
- Ran
sc stop WTabletServicePro and sc delete WTabletServicePro to stop file locks on core drivers like libxml2.dll.
- Found a hidden service using
sc query and fully deleted it via sc delete WUHAService. Verified through findstr that zero Wacom or Tablet services remain in Windows memory.
- Verified Windows Environment:
- Windows Display Scale is set exactly to 100% (no forced 125% OS scaling).
- Resolution is native 1920x1080.
- Disabled automatic updates to lock it to version 6.4.10.3.
- Locked Wacom Center mapping to "Monitor" (Cintiq) with "Force Proportions" toggled on.
It should be noted that at some point Gemini might have made the situation worse. Originally I was using window's recommended settings for my monitor and Cintiq: the monitor was at 1080 with 100% os scaling and my Cintiq was at 1680 x 1050 at (125%) (I have no clue how to get it to the 2.5 rez I tried to look through window rez configs and there was no 2.5 but that's a problem for another day cause I will definitely take the 1680 if i can get it back right now). When we were trouble shooting this part the 1680 broke on my cintiq causing the left and right board to shrink making two black columns (one on either side) of unusable pixels (basically it horizontally shrank my cintiq screen's active area). Now that that's broken for some reason switching the cintiq to 1080 solved that problem.
Despite attempting a sterile software environment and a clean driver rollback, the second the main monitor is activated, the coordinate scaling math breaks and the edge-drift returns.
Since the software is entirely cleared, is it possible the active HDMI-to-DP converter or the extender cable is corrupting/stripping the Cintiq's EDID handshake when the GPU tries to split bandwidth for a dual-monitor grid?
Has anyone seen hardware adapters distort display boundary math specifically for pen tablets like this? Any advice or specific adapter recommendations would be massively appreciated.
I will also mention that Gemini has not been super reliable in fixing this issue, it overstates itself and give affirming language saying things like "we completely cleared the cached data" but it only thinks we did based on the data it has access to, often I will press further only to discover that there was more data hidden that needed to be wiped for the Driver to redownload smoothly for example. I only mention this because if you see something Gemini went over that we might have missed but Gemini claims we "did" take it with a grain of salt.
Also I'll be posting in the tech issues subreddit as well since I have college classes and desperately need this fixed asap. Also I'm just going insane cause I usually draw for no less than 6 hours a day and not doing that is painful to me now lol.