I tested it out on all computer using PCLOS.

Some info one the laptop:

OS: PCLinuxOS x86_64
Kernel: 4.20.7-pclos1
CPU: Intel Core 2 T5600 (2) @ 1.833GHz
GPU: AMD Mobility Radeon X1300
Memory: 2308MiB / 3000MiB (4G but 1G is used by video)

Trinity: R14.0.5
trinity-kpdf-14.0.5-1.pclos2018

I can call pdf doc properties from within kpdf.

Thank you in advance.

Kate