Grub with retina displays (high resolution)

I currently use Ubuntu on my macbook pro with grub. My macbook has a retina display with 2560×1600 resolution. The grub startup screen font is so tiny that it is barely readable.

How can I make grub appear in an eye-friendly way with this setup? Just passing on a gfx mode like GRUB_GFXMODE=640x480 does not have any effect?

Thanks for a solution.

Asked By: binaryanomaly

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Since there seems no way to use a different resolution with this hardware, the solution is to increase the font size as described here: Can GRUB font size be customised?

Which works perfectly.

Answered By: binaryanomaly
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