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zimmt

External Display + eGPU Glitch

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Having Affinity Designer or Photo open and switching between an eGPU with external display or back to the MacBook causes a glitch. The artboard its displayed as usual but scrolling has no effect, it does not update. I can see the scroll bars reflect the input but the dartboard/affinity display itself does not update. Only closing and restarting the app fixes this.

Is this the desired behavior? Maybe there is no eGPU support. I believe this also happens without an eGPU and a straight connection to an external display.

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I've tested this without an eGPU and just a regular external display with a MacBook. Opening Affinity on the MacBook and then attaching the screen creates the glitch in the video when scrolling/moving the artboard.

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Hi @zimmt,

Sorry for the delayed reply. 

We are aware of this issue, but it should only happen with "Metal" Display under Preferences > Performance. Can you please confirm if that is the case? If so, can you please check it with OpenGL and see if that' still an issue? 

Thanks,

Gabe. 

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Ok, so I did some more testing. Without using an eGPU and having OpenGL set for all versions (1.6s and Betas), I can confirm it works fine connecting and disconnecting an external display.

Using an eGPU (Blackmagic in this case) does not work, even with OpenGL. Sometimes it does work but by the second or third connect or disconnect the viewport just stops responding (the glitch in the video above I was not able to reproduce). Also, Affinity Photo Beta seems to have issues switching away from an eGPU and requires a force disconnect or just closes itself on disconnecting the eGPU.

Maybe the eGPU function uses Metal in some way. Could also be unique to this eGPU. Not a dealbreaker issue for me but just wanted to share.

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