> You should only be setting the GRUB_GFXMODE, not the vga=. Does it
work when you do that?

setting only GRUB_GFXMODE and GRUB_GFXPAYLOAD to the very same value does not 
work at all: Grub switches to 800x600, but the kernel will only use 640x480. I 
*have* to set "vga=" too! Maybe this is because some older kernel do not use 
"GFXMODE", but "vga"?
The newer kernel just *ignore* setting "vga=" but these kernel do *not* switch 
to what is expected by GFXMODE. They are ignoring both: "vga=" and "gfxmode="!
Some kernel in between tell me about "vga=" being deprecated and should not be 
used any more. Some honour this setting, some do not. It depends on 
distribution and how the kernel was compiled.

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https://bugs.launchpad.net/bugs/1247907

Title:
  Ubuntu booting into black console

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