View Full Version : [ubuntu] Grub does not show Windows anymore

December 7th, 2010, 11:28 AM
After installing the latest updates, grub removed my windows from the boot list. As the new grub version looks really complicated, I can't create the entry manually (only grub.cfg which is very crpytic compared to former menu.lst).
Could anyone give me an example, how the entry for a windows 7 should look like?

I tried the automatic way, which simply won't find my Windows:


December 7th, 2010, 11:48 AM
Are you sure you didnt accidently delete/overwrite your windows partition?

December 7th, 2010, 11:52 AM
Normally, you would run 'sudo update-grub', but it seems that you may have effectively done that, because...


is what update-grub runs. However, did you run it with 'sudo' and/or any arguments? Because it needs to be...

sudo grub-mkconfig -o /boot/grub/grub.cfg

If there is any doubt, try running:

sudo update-grub

If that doesn't work, open Synaptic package manager and see if the package os-prober is installed. I've seen a thread where the absence of os-prober was the cause of Windows failing to appear in the grub menu. Which is very odd because os-prober is part of a default install. Nevertheless, it's worth checking.

Lastly, if all else fails, run the boot info script here:


Post the RESULTS.txt file. We need that for the partition information needed for a grub2 Windows stanza. Please make sure you post the output in code tags (use the # icon in the toolbar above the message field), otherwise it will be unreadable.