after upgrade my ubuntu to 10.10 from 10.04 yesterday today i get kernel panic at boot

After several tries, finally i can acces the trial mode of the ubuntu live cd.
I reinstal the grub then restart it but now it is getting worse. My screen goes black with some white horizontal lines in the middle. What should i do??

Do you have still menu ? In this case, try previous kernel version (3rd line).
Do you have an NVidia card, and did you change something on driver ?
You could try (I said try...) : http://www.ubuntugeek.com/how-to-fix-ubuntu-10-04-lts-lucid-blank-screen-at-startup.html even you issue is not a blank screen.

I've tried the previous kernel and it says "Ubuntu is running in low-graphics mode. Screen, Graphics card & input device settings could not be detected corrected"

There are some choice: Run Ubuntu in low-graphics mode for just one session, Reconfigure graphics, Troubleshoot the error, Exit to console login, Restart X

The "getpwuid" warning message is a meaningless one. I hope that some day someone will remove it. Sorry, I misread yesterday your message (too much messages to manage). Currently, I can't diagnose the problem. At first, could you reinstall Grub2 (bootloader) from CD. Perhaps the devices are wrongly named: https://help.ubuntu.com/community/Grub2#Reinstalling%20from%20LiveCD

It's fine delance, thx for your help anyway. BUt i still go nowhere eventhough i've reinstall grub2.

From http://www.ubuntugeek.com/how-to-fix-ubuntu-10-04-lts-lucid-blank-screen-at-startup.html i found that i don't have /etc/X11/xorg.conf (the third solution). BUt i don't know how to copy a new “known good” xorg.conf file to the HD.

It's outside my competence area. I will let question open so someone else could answer.
http://www.osguides.net/operation-systems/217-how-to-create-xorgconf-in-ubuntu-910.html will tell you how to create file xorg.conf.

i've create file xorg.conf. But still my problem not solved yet.

I find the page with some menu: Run Ubuntu in low-graphics mode for just one session, Reconfigure graphics, Troubleshoot the error, Exit to console login, Restart X.

Help please..or at least tell me how to take my file from my ubuntu pc, so that i can reinstall it without loosing my data.

I do have nvidia card but i don't change anything (as far as i can remmember). THis happens after my computer got crash (maybe that was caused by too much program that i operate).

lspci give me:

VGA compatible controller: ATI Technologies Inc RV 280 [radeon 9200)

I reinstall my ubuntu 10.04 tq delance