I had Ubuntu 10.10 installed on my laptop,and used the update manager to upgrade to 11.04. So it installs, reboots, and everything is fine. However, now it won't start. I choose Ubuntu from the boot loader, I'm dual booting with Windows 7, and all I get is a black screen with a white dash at the top left. After a while, it reboots. Why can't I get 11.04 to start?

Hello,

Have you tried running a different kernel? Are you getting any other output whatsoever? I never heard of this problem before. Can you verify that ubuntu is indeed trying to load?

Cheers,

Josh

Hey. My suggestion is as always regarding Ubuntu: Do af fresh install. Btw: did you know that there still are bugs in Unity?
Best regards

+1 Try booting from a previous kernel and see how it goes. If it can start of the 10.10 kernel we may be able to help you work out what went wrong.

How do I boot from a different kernel? I'm pretty sure that it is trying to load, because after the upgrade, it rebooted just fine. Also, on rare occasions it loads, but is a little buggy, and when I close the lid, the login screen doesn't appear when I reopen it. I'm probably going to delete the partition, and do a new install. Should I install a 64-bit or a 32-bit? I know that my system type for Windows is a 64-bit operating system. Also, 10.10 64-bit ran fine. Should I install 11.04, or should I wait until some bugs are fixed?

In GRUB you should have a list of the kernels you have installed over time. Choose a different one, not recovery mode though, and hit enter. If that doesn't work choose recovery mode on the first kernel.

Ok. I turned on my computer, and selected "Previous Linux Versions" and chose the Ubuntu that came up. It took longer than it normally did, but it loaded, I logged in, and it looked like 11.04 when I last had it working. It had the same background, Unity, the same Compiz animations. Now that this loads, what can I so that I don't always have to go to "Previous Linux Versions", because I like the Unity interface for some reason, or else I would just reinstall 10.10.

I can verify Ubuntu 11.04 wont boot on my Acer eMachines E527. Only solution is to press ESC at boot and select previous kernel (F2).How do I save my GRUB after edit? I want to add "acpḯ=off" to end of GRUB

Edit the file /etc/default/grub (as root) and put your options in the line containing GRUB_CMDLINE_LINUX_DEFAULT.
If you edit this file you have to do ato apply the changes.

@nine9nine, here's some reading for you. I would suggest you go through the listed bug reports and there are quite a few.

I'm just going to load from "Previous Linux Versions" because it works great, and still has Unity. Thanks to everyone who helped; I wouldn't have thought to use a previous kernel.