This is an issue with the package. Printing with this driver creates a segfault on 64 bit systems (check dmesg to see) because of some sloppy C code in the Epson driver. It needs a patch as the other driver epson-inkjet-printer-escpr got, but I lack the skills in C to do it myself.
I don't understand though how you made it work with the epson-inkjet-printer-escpr driver because it does not actually include a PPD for the ET-4750.
Pinned Comments
bwrsandman commented on 2019-01-25 16:06
Just a suggestion: could you add the following keywords to the package, it will make finding the package for specific printers easier: