09-29-2018, 12:06 AM
I ran into this issue when I created a faster version of Vectorlinux called Velocity. I used Fluxbox and PCManFM. I discovered way back then that dbus and PCManFM didn't cooperate as smoothly as Thunar. Copying smaller files worked just fine until you got to something around 20mb in size then you started seeing what your experiencing now. I have not dabbled into that realm again as there was to many issues with Fluxbox that I didn't like, like having to use icons to open and eject usb drives and not mounting things correctly. I wish I could give you more answers but sometimes things do not get fixed. I hope it is just a config file in PCManFM to allow the polling of mounted volumes.