How to get screen resolution of 1440x900?

[Petrus de Calguarium]

Kevin Kofler wrote:

> No, the X11 modesetting should also work. The old driver which used the
> BIOS for modesetting isn't used anymore, all current modesetting
> implementations, both the X11 one and the kernel one, do the work on their
> own.

I tried booting with i915.modeset=1 and X stopped at a white screen and went no further, locking up the system.

Then I booted without the line (and removing nomodeset) and got into an X session.

I ran gtf 1400 1050 60 and got a modeline.

Then, I ran

xrandr --newmode 1400x1050_60.00 122.61 1400 1488 1640 1880 1050 1051 1054 1087 -HSync +Vsync

and the result was:

X Error of failed request: BadName (named color does not exist)
 Major opcode of failed request: 150 (RANDR)
 Minor opcode of failed request: 16 ()
 Serial number of failed request: 17
 Current serial number in output stream: 17

So, what gives?