Performance of brushes different when in Photo vs when in Pub, but using Photo persona

[doodleslice]

I'm using version 2.0.4 of everything.  I am running the software on an M1 Macbook Pro with M1Max 32gb RAM with a Huion Kamvas 22 Plus tablet monitor connected.

When I am in Publisher and using the Photo persona to paint on a manuscript page the brush performance lags terribly. This doesn't happen when I am just in Photo directly.  I tried just about every display setting variation. I only found one weird thing that seemed to improve (but not fix) the situation, and that was to change the Macbook's refresh rate from ProMotion to 60mhz (60 is also the rate that the external tablet monitor runs).  

When I use the Designer Persona within Publisher there doesn't seem to be the same issue regardless of refresh settings.

When I go to my iPad (2017 ipad pr0 10.5) and try opening Publisher and using the Photo persona on the same manuscript the brushes have no problems at all keeping up with the stylus.

I'm really hoping that there will be a fix for this because I am working on illustrating a manuscript and one of the features that really got me excited about Affinity was the ability to hop directly from a page in the manuscript into the Photo persona.

Thanks!

[DWright]

Hi @doodleslice,

If you disconnect the Kamvas tablet do you have the same lagging in the Photo persona in Publisher when using the mouse.

[doodleslice]

Just did some checking. Without the Kamvas there is no lag issue on the brushes. This got me curious so I connected another monitor, a Dell 1905FP.  When the Dell was running at 75mhz and the macbook at ProMotion there was no problem, but when the Dell was set to 60mhz the lag returned. So I then switched the macbook to 60mhz and the lag went away. So it is not just the Kamvas, maybe it has something to do with the 60mhz setting. To recap:

 

MBP promotion + Kamvas 60mhz = bad brush lag

MBP 60 mhz + Kamvas 60mhz = slight lag

MBP promotion + Dell 75mhz = no lag

MBP 60mhz + Dell 75mhz = no lag

MBP promotion + Dell 60mhz = bad brush lag

MBP 60mhz + Dell 60mhz = no lag

Then I tried connecting both the Dell and the Kamvas and the behavior remained consistent with the above (the Kamvas only has the one mhz setting)

Hope this helps for diagnosis. Thanks!