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i am new at linux and ubuntu, today i installed ubuntu 12.04 but during installation some problem happened, i don't remember what was that exactly (but can tell you that it was related to boot), so i reinstalled ubuntu (using usb stick both time) and ubuntu installation finished successfully,

Now problem is that when I start my computer then system is directly selecting ubuntu as my operating system, i have installed it along with windows 7 in option during installation, so it should give me option to select which operating system i want to use. I don't know what may be the problem.

Also, I want to know where ubuntu is installed (which directory)? i just selected default setting during installation as i am noob in these things.

/** i think i found problem, problem is that during startup the selection of operating system is hidden behind this square box saying that 'out of range 92.5khz / 58hz' , i was able to guess windows 7 option will be last so using my sense i can choose operating system now. but now again new problem that message (i think there is some screen resolution problem so desktop is unable to display window saying that out of range),

i have no idea how to solve this problem now.) */

---- solution--------

GRUB. I download GRUB Customizer and change the resolution of the screen and now I can see all the menu!

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closed as too localized by fossfreedom Nov 19 '12 at 16:43

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

4 Answers 4

As someone explained, Sudo Update-grub should have done it for you , If not , You must restart ,Then at the beginning of boot before Ubuntu even dares to try to show up , Click Shift

Click Shift , Click Multiple or Hold , Then it says Loading Grub Then you have your options , Click the recovery mode , And you can update grub from one of the options there , That is like a Back-up if the Terminal Commands fail you.

If that doesn't work , Then you might need to re-install Windows , I am having trouble with that myself so I can't help you there.

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Install grub customizer and change the boot splash wait time http://webupd8.org/2012/09/grub-customizer-30-released.html

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Open the Terminal (Ctrl+Alt+T) and type

sudo update-grub
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either of the following would have happened

  • grub, which allows multiple system to be configured perhaps dosen't contain windows boot details.
  • or grub has the entry but it has selected ubuntu has default operating system and the selection time is kept at a low value, because of this reason its boot by default in Ubuntu.

in any case you will have to the following

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