Can't get 1440x900 resolution with GRUB2 although vbeinfo says it's available

Programmer Question

I'm trying to use GRUB2 in graphical mode with 1440x900 resolution, but the result is always garbled nonsense: the highest resolution I can get is 1280x800.

Word is from googling that long as vbeinfo lists a resolution, GRUB2 can use it. This doesn't seem to be true: vbeinfo says that 1440x900 is available but it doesn't work.

Testing it from the GRUB2 command line:

set gxfmode=1440x900
terminal_output gfxterm
# -> garbled nonsense

# back to trusty 640x480
terminal_output console

The graphics card is an Intel GM965.

Find the answer here