Certain brush sizes cause my screen to go wonky

[Norman5C56]

Running latest version of Cloud P-Shop, Lightroom and LC - in all 3 programs, when I use the brush, my screen goes wonky - gets black from a point roughly at the bottom of the brush, duplicates screen image, flickering, etc.

Only happens with a brush of a certain size. In Photoshop, that size appears to be between 200 and 400 pixels. In Lightroom, it is size 6-12.

Smaller brushes, or larger, and the screen is fine.

Using an Asus Zenbook with touch screen, which I think may be part of the issue. windows 10.

Anyone else experience anything like this?

Thanks!

[Norman5C56]

Also, forgot to mention that I have already turned off graphic acceleration.

Additionally, the exact pixel range is 190 to 384. 189 is fine; so is 385.

[J453]

Just to confirm, you quit and restarted after disabling the GPU? Did you try updating your graphics driver?

[Norman5C56]

Yes and yes.

[Norman5C56]

Looks like I've stumped everyone.

No one else has run into this issue?

[Semaphoric]

Does this happen with all different types of brushes, caligraphic, dry media, etc?

[Norman5C56]

Doesn't't matter what type - as long as I have a brush. Can be paint brush, healing brush, etc.

[Norman5C56]

So I installed Lightroom, and this does not happen in that program - only PS and LRC. Does that give any clue that might help solve this? Because honestly, it's difficult, if not impossible, to use PS and LRC with this issue unresolved. 

thanks!

[hazembill]

same problem from 250 to 400 px size