9th February, 2013. I have routine updated ubuntu 12.04. I have installed from a CD downloaded from this site. I have updated my 12.04 successfully in last few months. I did routine update on 12.04 as usual and it asked me to restart to complete update. I restarted and arrive at a signon screen which has my username and "Guest". This screen shows the menu at the top with power, time, calendar, etc. So I entered my password and I am taken to a screen which only shows a blank screen, empty launcher area only including dash and trash. The only thing that works is I cam move my mouse but there is nothing on screen which I can click. Terminal is also not working by using Alt+Ctrl+T key. Please help in this.
11th February, 2013.
I saw new thing. Before routine updating, the OS selection page was (or grub loader page):
Ubuntu, with Linux 3.2.0-38-generic Ubuntu, with Linux 3.2.0-38-generic (recovery mode) Memory test (memtest 86+) Memory test (memtest 86+, serial console 115200) Windows 7 (loader)(on /dev/sda1)
When move my cursor with arrow key on first line and enter, it will start ubuntu 12.04 in just one step. But after routine updating I did not saw change in grub. New menu is:
Ubuntu, with Linux 3.2.0-38-generic Ubuntu, with Linux 3.2.0-38-generic (recovery mode) Previous Linux Versions Memory test (memtest 86+) Memory test (memtest 86+, serial console 115200) Windows 7 (loader)(on /dev/sda1)
Here third line (in bold fonts) was newer than the previous grub version. Just for curiosity I entered in third line to check what is in it. It showed following lines Ubuntu, with Linux 3.2.0-37-generic Ubuntu, with Linux 3.2.0-37-generic (recovery mode) Ubuntu, with Linux 3.2.0-36-generic Ubuntu, with Linux 3.2.0-36-generic (recovery mode) Ubuntu, with Linux 3.2.0-35-generic Ubuntu, with Linux 3.2.0-35-generic (recovery mode) Ubuntu, with Linux 3.2.0-34-generic Ubuntu, with Linux 3.2.0-34-generic (recovery mode) Ubuntu, with Linux 3.2.0-33-generic Ubuntu, with Linux 3.2.0-33-generic (recovery mode) Ubuntu, with Linux 3.2.0-32-generic Ubuntu, with Linux 3.2.0-32-generic (recovery mode) Ubuntu, with Linux 3.2.0-23-generic Ubuntu, with Linux 3.2.0-23-generic (recovery mode)
When I enter any of the line:1,3,5,7,9,11,13 it will give me my installed ubuntu 12.04 LTS 64 bit with proper functioning and all the previous settings. This gave me my original Ubuntu in two steps of OS selection page. I do not understand why this additional OS menu has been added. And also how to get back to previous one step OS selection page?