Public bug reported:

$ fbset 768x576-75
ioctl FBIOPUT_VSCREENINFO: Invalid argument

And the same happens with all other modes
defined in /etc/fb.modes

The problem seems to be that KMS fbcon does
not accept the pixclock parameter, which is
the first parameter in a "timings" string.
Changing it to 0 for all modes makes them to
work, albeit w/o actual resizing. The image
then just occupies the upper-left corner of
the screen. But its still better than the
complete failure.
I suppose also other timing params are not
supported. At least if you run fbset w/o
parameters, it will display all timing params
set to zero.
So I think zeroing "timings" for all modes
in /etc/fb.modes will help with KMS.

Additionally, please add the 1920x1080 mode,
its currently missing.

** Affects: fbset (Ubuntu)
     Importance: Undecided
         Status: New

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  ioctl FBIOPUT_VSCREENINFO: Invalid argument

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