Running Windows Vista and Ubuntu 11.04 on an Acer tower. Was running 10.10 with kernel, running great. Upgraded to 11.04 from Update Manager, re-boot results in Input Not Supported error, then a short delay, then 11.04 boots, but without GRUB menu. I would like to get to version 12.04, but am afraid to continue until I get 11.04 running error-less.


try to reinstall your grub with this tutorial: http://odzangba.wordpress.com/2011/05/14/455/


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