All Posts by Date or last 15, 30, 90 or 180 days.
also by Lloyd: photography and
Thank you for purchasing through links and ads on this site.
diglloyd Deal Finder...
Buy other stuff at
Capacities up to 56TB and speeds up to 1527MB/s
Sony A7R IV

NEW! Technology tour de force.

CLICK THIS AD to pre-order @ 10 AM Eastern July 18.
My review will be in-depth!

Sony gear wishlist...
√ B&H Photo PAYS THE SALES TAX FOR YOU More info...

Video Card or Photoshop Bug? (graphics drawing glitch)

Notice the glitch at center cutting through the siemens star pattern? It goes away with the GPU disabled. I even swapped displays to rule that out.

It is sensitive to image size and doesn’t always appear, but the same Siemens star scaled to various sizes will frequently show it. Scrolling has no effect, showing that the bug cannot be in the image data itself.

On the Mac Pro with 2560 X 1600 display, the glitch is always at 800 pixels, exactly half of the 1600 screen height. And shows up in Photoshop CC full screen mode with menu bar; I am not able to reproduce in full screen mode without menu bar or with regular window.

Crop below is actual pixels.

Drawing glitch : 2013 Mac Pro, Adobe Photoshop CC 14.2.1
(actual pixels)

Similar issues are seen on the late 2013 MacBook Pro with Retina display, but the issue arises in about 1/3 down from top.

That it happens on two different Macs with two different graphics cards suggests a Photoshop bug or some kind of more general GPU bug.

Drawing glitch: late 2013 MacBook Pro, Adobe Photoshop CC 14.2.1
(actual pixels)

Glitch be gone:

GPU disabled in Photoshop CC

Deals Updated Daily at B&H Photo | Terms of Use | PRIVACY POLICY
Contact | About Lloyd Chambers | Consulting | Photo Tours
Mailing Lists | RSS Feeds | Twitter
Copyright © 2019 diglloyd Inc, all rights reserved.
Display info: __RETINA_INFO_STATUS__