Seems there is a mechanism. The frambuffer mode selection interface
applies to the DRM connectors. This means that you can sepecify a mode
per output as below on the kernel command line:
video=<output>:<mode>
Where output its the name of the output as per xrandr, say VGA1 or LVDS,
and the mode is say 1024x768. The mode may be pretty complex:
<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
** Changed in: linux (Ubuntu)
Assignee: Steve Conklin (sconklin) => Andy Whitcroft (apw)
** Changed in: linux (Ubuntu)
Status: New => Invalid
** Changed in: linux (Ubuntu)
Status: Invalid => Fix Released
** Changed in: linux (Ubuntu)
Status: Fix Released => Invalid
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KMS does not allow the user to pre-select a resolution
https://bugs.launchpad.net/bugs/530216
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