I was really hoping to upgrade our system here to 6.4 but quickly ran into several problems.
I coudn’t install 6.4 on a VMware machine because it couldn’t find graphic driver even though devg-vmware.so is available.
So I tried installing it on my target machine which is Advantech Single Board Computer with intel chipset using the i-830.so driver. This time it installed okay but when I try to use any photon app that uses offscreencontext drawing stuff it doesn’t draw it on the screen. This target machine works with 6.3.2 but not in 6.4. I am kind of disappointed with 6.4 installation but maybe a patch will be released soon