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I installed Ubuntu 12.04 alongside Windows XP. The problem is that I cannot see the bootloader menu to choose XP anymore. My monitor shows the the message: Optimal Mode 1440x990 60Hz. After a while Ubuntu starts and I can see the Unity screen.

I have an onBoard Graffic: NVIDIA Cooporation C61 [Geforce 6100 nForce 405] (rev a2)

How can I fix that problem?

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See this answer… or this… – user68186 Dec 20 '12 at 13:30

Maybe the bootloader resolution is set too high, which your monitor cannot handle. To change it, boot into Ubuntu.

Open your terminal and type

sudo gedit /etc/default/grub

find the line


remove the # before the line GRUB_GFXMODE=640x480

save, then type in terminal

sudo update-grub

now reboot and see

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