After Ubuntu 12.04 installation my lap do not starting automatically
 

So, now it starting by displaying a window offering to select the startup program. In addition, it appears valid for the previous version of Ubuntu. And it happens every time. What can I do?

Are you saying that your on a dual-boot machine and that it's asking you to select operating system? Where is it asking and what is it asking...Need more information!

answer
 

No, it is not dual. I have had previous Ubuntu 10.04 and I instaled new version. After instalation machine shows black screen with frame GNU GRUB 1.99.-21 ubuntu 3.4 and offers starting modes:
ubuntu, with Linux 3.2.0-31-generic - with this it starting autmotically, but very soon "hang on" and screen stay black - nothing hapen...
ubuntu, with Linux 3.2.0-31-generic (recovery mode)
Previous Linux version - "clik" on this then next screen offers Ubuntu, with Linux 2.6.32-43 - generic: so in this case it working good, but I should going in the same process every time when starting mashine.

So, it look like I have two accounts. Because one of them is signed as Ubuntu 12.04, but another one not - it is something "between" :)
This is probably the reason why the computer can not boot automatically...?

Have you tried recovery mode? There are other options after recovery mode but you do need to select it first.

Linux 2.6.32-43 is the old kernel for 10.04; you actually don't want to use it.

Having said that, when the Grub menu shows, you can press 'e' to edit the boot options. In the new screen, find the line that contains quiet splash and replace quiet splash by text; you can use the cursor keys to navigate. Next press <ctrl>x to boot with those settings.

You should get to a console where you can login (note that while typing the password, you will not see anything, just type and press <enter>). Do you get to a console?

To shutdown your system from there, run
To reboot your system from there, run
Again, while typing your password, you will not see anything, just type and press <enter>

Can you please provide make and model of the videocard and the monitor. If you have a nVidia card, you can try to add nomodeset to the line with quiet splash so it reads quiet splash nomodeset.

Oh, and this might be of interest; a lot of reading ;)

http://ubuntuforums.org/showthread.php?t=1743535

Thank`s!
So, in the Grub menu I did press 'e' in the new screen I found line what contains: quiet splash, but in this way:
linux /boot/vmlinuz -3.2.0 -32 -geberic root =VVID= b2f0b553 -feb9 -4b42-bf6d-23781d7d7c62 ro quiet splash $vt_handoff. Well, I erase quiet splach and tape text; then I press ctrl x, but engine do not boot. I just get black screen... I even type password and press Enter, but nothing happen... What now? :)

Wow! Yes, it works with <nomodeset> but in recovery mode- large icons etc :D

Something more, I discover that in "normal" mode laptop boot, but screen is without back light - there in the "darknes" are all icons and by using pocket light I can operate. Oh, my... Is it possible reinstal previous Ubuntu?