Comment 41 for bug 614088

I had a problem with this error earlier.

I recently got an Acer Aspire Revo for general use computing, and put the last Ubuntu on it (10.10 I think?), desktop edition.

It recently asked if I wanted to update to the 11.04 version, which I did so, however upon restarting after the update I got the message that I didn't have the right hardware and that I should select something else at the log in screen. The problem there is that as the only user of the system I have it set to auto log me in so I never see the log in screen. The second problem with this is that once this message was shown, the system was no responsive and I have to force a shutdown; I could not click on the OK button, or press enter to confirm the dialog, or press 'c' to follow the underlined close button.

After a restart, I got the same message, with no way for me to interact with the system until the message appears, at which point it freezes the system and I have to force a shutdown. This seems like quite a large problem; I get no log in screen, the error tells me to do something different at the log in screen I don't see, and it freezes after showing me the dialog so I can't do anything.

I seem to have managed to solve this by pressing enter just before the dialog appeared, and that seemed to confirm it and continue using the old interface that I have been using with the last version.

After a quick search online, I found this bug report, and the following article, this to get the 2D version of unity:
http://digitizor.com/2011/04/28/after-installing-ubuntu-11-04/
" Install Unity 2D
Unity 2D is a lighter version of the normal Unity (or Unity 3D) which comes with Ubuntu 11.04. Unity 3D does not run in systems which does not support 3D acceleration. Unity 2D will however run on such systems and it is also a lot more responsive compared to Unity 3D.

You can have both Unity 2D and Unity 3D installed on the same Ubuntu installation and select which one to launch at the login screen. To install Unity 2D, open the Terminal and execute the following commands:

$ sudo add-apt-repository ppa:unity-2d-team/unity-2d-daily
$ sudo apt-get update
$ sudo apt-get install unity-2d"

I believe what I have to do to get it to not display the error is to change what is sued at log in from the System -> Administration -> Login Screen menu, but what should I change it to? Ubuntu, Ubuntu Classic or Unity 2D? Will there be a chance of similar problems with the Unity 2D? I am not overly bothered about what interface I will be using as I have only been using the last one for a few weeks so have no major attachment to it, I just want to use one that will work when I turn the computer on (and be fairly snappy, the computer is fairly low power).