SAP ERP: Printing problem in a customize program

Hi All,

I have an issue regarding with printing in our customized program. Hope you can help or give some ideas with this problem.

Last week our IT team migrated the OS of our end users from windows(XP/7) to linux(Ubuntu 16.04) then after the migration we have encountered the problem with printings. They can print the documents but the outputs our different, it looks like the font in output changed then some letters became BOLD and some spacing our gone which make it hard to read.

Note: ServerOS - Windows Server 2012 R2 Std

SAP Gui version of end users is 730

Thank You!