The Xerox Phaser 6125N printer is a great piece of work, however it is not supported by default under Linux (Ubuntu 11.04 x64). 

= Getting it to work =

You can how-ever use little trick to adjust the provided driver of the [http://onlinesupport.fujixerox.com/setupDriverForm.do?ctry_code=SG&lang_code=en&d_lang=en&pid=DPC525A Fuji-Xerox DPC525A] CUPS ppd in such a way that is also works fine for this printer. As described over here http://ubuntuforums.org/showthread.php?t=1205253. 

= New Features =

This steps how-ever does not alter the ppd file in such a way that it is automatically detected, the attached files have two new features:
1. provide autodetect support for both USB and UTP printing.
1. Set the feeder to 250 pages by default, instead of none.
1. Removed the non-standard and unsupported FXPostCard.

= Download & Install =
For the deb folks:
1. Download [raw-attachment:cups-xerox-phaser-6125n-1.0.0.deb]
1. $ sudo dpkg -i cups-xerox-phaser-6125n-1.0.0.deb

For the non-deb folks:
1. Download [raw-attachment:cups-xerox-phaser-6125n-1.0.0.tar.gz]
1. $ sudo tar -C / --no-overwrite-dir --keep-newer-files -xvzf cups-xerox-phaser-6125n-1.0.0.tar.gz 

When running Fedora 18,19,20,21,22,23,24 64bit you will also need to install a bunch of 32 bit libraries to get it working.
1. $ sudo yum install /lib/ld-linux.so.2 /usr/lib/libcups.so.2

When running Fedora 25 64bit you will also need to install a bunch of 32 bit libraries to get it working
1. $ sudo dnf install /lib/ld-linux.so.2 /usr/lib/libcups.so.2

= Troubleshooting =
The package might create insecure permissions, causing the filter to fail as shown in /var/log/cups/error_log:
{{{
 E [21/Apr/2014:13:20:23 +0200] Phaser-6125N: Directory "/usr/lib/cups/filter" has insecure permissions (040775/uid=0/gid=0).
}}}
 $ sudo chmod 0755 /usr/local/cups/filters

= Windows 10 driver Support =
There is no Windows 10 driver Support for the Xerox Phaser 6125N anymore, yet the [http://onlinesupport.fujixerox.com/setupDriverForm.do?ctry_code=SG&lang_code=en&d_lang=en&pid=DPC525A Fuji-Xerox DPC525A] driver works fine. Do mind you need to change some options like telling tray 1 has an 250 sheet feeder and set memory support to 64MB, but at least you do not need to buy another printer. 

= Need Help? = 
If you can not get it work as expected. Please drop me an [mailto:info@rickvanderzwet.nl?subject=Xerox%20Phaser%206125N%20Question email]