Ubuntu freezes on livecd startup everytime

[fandan]

I tried to start Ubuntu 6.06 (both x386i and AMD 64bit) from LiveCD (both x386i and for AMD 64bit), but the system freezes after start graphical interface. The last, what i see, is the icon-box with name "Ubuntu" in the upper right corner and, sometimes, the first icon (for Window Manager). Than the system feezes completely and must be restart either with !!2!! hard-resets (by the first hard-reset the monitor doesn´t get a signal) or with a shutdown and new start. I tried to Start Ubuntu in "Safe graphical mode", with various params (acpi=off, noacpi, pci=noacpi, xforcevesa, vga=normal, irqpoll), but the same situation. I removed one of my RAM-sticks - the system freezes. After this I changed the sticks among themselves, nothing. Endless searches in various groups and forums let me think the problem is my ATI graphic card. But, as far as I can remember, with my old NVIDIA graphic card I have had the same problem. Someone else this problem, or better, a solution?

My system sheet:

- Shuttle AN51R Board (newest BIOS) with onboard LAN an SOUND
- AMD 64bit 3400 CPU
- 2048MB RAM (GSkill)
- ATI X850XT AGP 8x graphic card (PowerColor)
- 1 x SATA HDD
- 1 x IDE HDD
- LG Burner and Toshiba DVD Drive
- Creative Sound Blaster Live!

Every idea is welcome!

-Stefan-

[Caroline Ford (secretlondon)]

There is a RAM tester on the CD - could you run it?

[Colin Watson (cjwatson)]

This isn't a ubiquity (installer) problem.

[Brian Murray (brian-murray)]

We are closing this bug report as it lacks the information, described in the previous comments, we need to investigate the problem further. However, please reopen it if you can give us the missing information and feel free to submit bug reports in the future.