Photoshop 2020: Paints zig-zag lines by itself

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  • Updated 2 weeks ago
  • (Edited)
Unfortunately I have the next problem with Photoshop CC 2020 and my new system (Ryzen 3900x, Nvidia 2070 Super, PCIe4-SSD, Gigabyte Aorus Ultra X570, 32 GB RAM with Wacom Intuos PRO).

If I have 4-8 pictures open in Photoshop, the problem arises that the brushes "are going crazy". Regardless of whether I use the eraser or another brush - many straight lines are suddenly erased or painted over the entire image.

When I stop erasing oder painting, Photoshop continues to "paint" zigzag lines for a short moment. It only helps to restart the program. After some time (10-30 minutes) the problem reappears.Reinstalling Photoshop didn't help.Does anyone know the problem?

Best regards Tom
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Thomas Weber

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Posted 1 month ago

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Dave Grainger

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Which version of CC 2020 do you have? This sounds like what was happening with 21.0.1
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Thomas Weber

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It is version 21.1.3 - latest Version.
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Dave Grainger

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Ironically, the problem you describe sounds like the problem (one of 'em) that 21.1.3 was fixing! My GUESS is that it might be a hardware or driver conflict. Perhaps one of the more knowledgeable people have a better answer.
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Thomas Weber

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It's really weird. I am using the studio driver version of Nvidia (latest). I'm going to try the gaming drivers.
I had already installed Photoshop completely (on a new Windows installation) - unfortunately no change.

I also have the problem that "reduce blur" is extremely slow on my very fast (!) system (2 minutes of rendering for a 21 MP image). My old i7 (6 years old) does that in 25 seconds.

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Dave Grainger

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More evidence that the issue is, at least in part, related to the hardware... Is this machine, by any chance, a home built / hobbyist computer?
(Edited)
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Thomas Weber

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correct: it is this high-end PC (based on a suggestion by the German PC magazine "c't"). Everything is going very, very quickly - only Photoshop keeps causing problems.

https://www.heise.de/select/ct/2019/24/1574180234060569


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Thomas Weber

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Example: I wanted to paint the wall white where the red squiggle is. I only clicked once - Photoshop then "painted" the lines over the entire image.

https://www.tom-e-design.de/_DSC9337.jpg





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Dave Grainger

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Need one of the more knowledgeable people to jump in here...
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Thomas Weber

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Addendum: Even in the latest version 21.2.0 the problem has not been solved.

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Chad Rolfs, Employee

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Hey Thomas.  Do you have PSUserConfig.txt in your Preferences folder? (i.e. are you using WinTab?). If you are, try disabling/removing that, restarting and paint.
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Thomas Weber

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Hello,
this file does not exist on my system. I don't use Wintab.

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dziga

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Hey Thomas,

what Chad was referring to is a file you can create yourself here:

%APPDATA%\Adobe\Adobe Photoshop 2020\Adobe Photoshop 2020 Settings\

If you don't have it, maybe it's worth trying to create one. Just create a PSUserConfig.txt with the following content:

UseSystemStylus 0

Restart PS and see if that helps.

If you are as annoyed as some others (me included) about standard tool behaviour suddenly being changed you can also add this into the file:

TransformProportionalScale 0
OnCanvasClickToCommit 0

That last part won't help your main problem, though :P

Cheers,
Dziga
(Edited)
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Chad Rolfs, Employee

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This may be a different bug where taps with stylus in layers panel get into a loop where events spool up but don't execute until something breaks the loop.  Does this happen after you attempt to perform an action in a panel using the stylus, for example - expand/collapse a layer group, then try to paint on canvas with strokes not showing and then you do something else and all the paint stroke then explode on canvas?
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Thomas Weber

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Hello Dave,

The idea is not bad. In fact, the pen input suddenly "discharges". However, only in a straight line - no curves.
If I then press Ctrl + Z (undo) and continue painting at the point, the brush paints right there. If I move the pen a bit and paint a little further to the right, then the program "paints" a straight line from the old to the new point.