M262x Printing in Eco mode

[tsh]

Hi, I have a M2825 printer which is connected via WiFi.  I am using driver2 v1.00.35 from your repository (indirectly) on Arch Linux.

I am able to print with my current setup, however, not in the Eco mode where it is supposed to save the toner.  There is no option in the print dialog and pressing the Eco mode button on the printer before printing also does nothing.

Is anyone able to print in Eco mode?  This is working on Mac OS X though..