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I've been running Ubuntu 12.04 for quite a while, but after installing Windows XP onto another partition, the MBR was overwritten, etc etc.

I downgraded 12.04 to 11.10 using a Live CD, but it still didn't work. Used boot-repair then reinstalled 11.10, and I got GRUB back. Yes!

So, I booted Ubuntu, and found that I had no control over anything except the keyboard. The touchpad, USB mouse, disk drive, USB anything, wireless card, all gone. This naturally means that I can't get anything onto the hard drive without lots of shenanigans using the Live CD. I've got a Gateway W340UI.

Eager to get 12.04 back.

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In my opinion, your solution that upgrade 12.04 to 11.10 is really bad idea to recovery grub menu. In this case, grub possible to recovery just using Boot-Repair (help.ubuntu.com/community/Boot-Repair) on ubuntu live-cd. –  Smile.Hunter Jul 27 '12 at 22:15
    
I know now. It's a MiRaClE that I still have my files intact. Sadly, I was mangling it before I looked at my problem well. Ugg. –  Anzkji Jul 27 '12 at 22:29
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2 Answers

Press Ctrl+Alt+T to open Terminal.

Run lsmod to check your drivers one by one.

My other recommendation is to re-install your Ubuntu system. (Or if your network works fine via Ethernet, then you can try to upgrade to newer kernel versions, either now or after reinstalling.)

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Okay... I have at least fifty drivers listed while in Live Boot, but when booting off the hard drive, I have four. uas, usb_storage, pata_atiixp, and sky2. –  Anzkji Jul 28 '12 at 12:55
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up vote 0 down vote accepted

I solved this problem by booting to an older kernel (3.0.0.23), which recognized my drivers, and then installing Ubuntu 12.04 from there. Thanks for everyone's help.

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For the benefit of others who have similar problems, do you know what older kernel you used? If so, you can edit your answer to include this information. –  Eliah Kagan Jul 28 '12 at 16:33
    
Yes add the kernel version on your answer and accept it as the answer. –  Peachy Jul 29 '12 at 2:05
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