How do I show grub when resuming from suspend?

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http://askubuntu.com – I have a Sony Vaio laptop, that came pre-installed with Windows 7. I resized the windows partition, then set up a dual boot scenario with Ubuntu. I've noticed that when I run Windows and put the computer to sleep (i.e. shut the lid), and later resume it will sometimes show the grub menu. If I select the Windows 7 entry, it will resume as expected. If I select Ubuntu, then later restart, then select Windows, Windows will again resume from the last state. The behaviour seems to be based on the amount of time it has been inactive. For example, if I shut the lid and the re-open straight away, i (HowTos)