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On my machine booting takes more than a minute which is annoying when I see that Windows 7 boots in 20 seconds.

Here is what I get when the machine is booting.

Picture of screen

How can I see what happens when booting up?

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Have you got proprietary drivers installed? That could explain the lack of a graphical boot. It doesn't explain the slowness. –  dv3500ea Oct 30 '10 at 23:16
    
Jup, i have proprietary drivers installed. –  Jai Puri Oct 30 '10 at 23:49
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2 Answers 2

up vote 19 down vote accepted

When you get to Grub (hold left shift on boot), edit the top option by pressing e and search the boot command until you see the two words "quiet splash". Delete these from that line and press Control+X to boot.

This will show you what's happening behind the scenes (and what it's getting stuck on).

This is temporary. It will revert to the old behaviour on the next boot so it's fairly safe.

If you want to make it permanent, edit /etc/default/grub as root, delete "quiet splash" from the GRUB_CMDLINE_LINUX_DEFAULT variable, save and then run sudo update-grub.

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thank you ... this worked. now i see what happens :) –  Jai Puri Oct 30 '10 at 23:50
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Just to complete: at Natty, you should remove "vt.handoff=7" also. –  desgua Apr 8 '11 at 3:00
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You can also use a program called Bootchart (click to install: bootchart and pybootchartgui) to plot a diagram of everything that's happening while booting. It will point out where most time is spent and whether there is anything seriously wrong.

This is what a typical bootchart looks like.

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Link has gone bad :( Here's a fresh one: bootchart.org/images/bootchart.debian.mcrae.0.png –  bukzor Nov 29 '13 at 23:56
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