Photoshop CS5: Weird screen update problem with "Step Backwards" and tablet.

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  • Updated 6 years ago
  • (Edited)
When I have my tablet plugged in, "Step Backwards" and "Undo" stop functioning normally. I have CS5 Extended 12.1 64-bit and OS X 10.7.3 with a Wacom Intuos PTZ-630.

Suppose I draw 3 discrete strokes with the stylus. If I hit "Step Backwards", I would expect the most recent stroke to immediately disappear. But it doesn't. However, as soon as I do anything (such as press the stylus tip to start drawing again), the stroke disappears! If I hit "Step Backwards" again, that stroke and the preceding stroke seem to disappear simultaneously.

Clicking & dragging the window for the image "counts" in terms of causing a screen update. So if I hit "Step Backwards", nothing will happen, but then as soon as I move the window even one pixel by clicking & dragging the top bar, it will take effect.

Hitting "F" to go into full-screen mode makes the problem go away. Both full-screen modes (there's one when you hit "F" the first time, and another when you hit it again) fix it.

Anyone experienced an issue like this?
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maxcantor

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  • frustrated

Posted 6 years ago

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Chris Cox

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Which machine? Which GPU?

And have you tried disabling GPU drawing in Photoshop's preferences?
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maxcantor

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When I go to Preferences -> Performance, under "GPU Settings", the detected video card is listed as:

Intel Inc.
Intel HD Graphics 3000 OpenGL Engine

I un-checked "Enable OpenGL Drawing", but it didn't seem to change anything.
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maxcantor

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Also, the machine is a 13-inch Macbook Air from mid 2011. It has a 1.7 GHz Intel Core i5 with 4 gigs of RAM. The GPU has 384 megs of RAM.
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maxcantor

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OK. I didn't realize you have to restart Photoshop for GPU settings to take effect. Now that I've restarted it with "Enable OpenGL Drawing" un-checked, the problem seems to be resolved!
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maxcantor

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Strange... if I unplug the tablet, I can no longer make brush strokes with the touchpad. I have to exit and restart Photoshop to be able to use the touchpad for brush strokes again.