12.04 install keeps hanging.

[Thelinuxgeek]

12.04 has been out for a few days now, I had some free time this morning to install it, and 6 hours later I'm ready to pull my hair out. I downloaded the x64 .ISO, burned it to a CD and tried to run the disc. It shows the purple screen for a few seconds, then a blinking prompt up in the left corner. I can hear the CD being read for about 5 minutes, then it goes quiet. I let it sit for a while but nothing happened. I tried running the .ISO through VirtualBox, and it worked perfectly fine, so I know the .ISO is fine. I'm positive the disc was burned correctly, and I tried booting from USB which was a disaster, but more details on that in a later post. Sorry if this is a vague post, but I'd really appreciate any help you can give me. Thanks!

[Sslaxx]

Going to bump this because this is the issue I'm having when booting off USB. I'm wondering if it could be either a SATA driver issue someone had reported, or an issue with the graphics drivers. Anyone else been experiencing similar?

[whatthefunk]

Same problem here with a Kubuntu 12.04 .iso. I let it set for half an hour and was rewarded with a blank screen and a lot of CD noise.

[Sslaxx]

I ended up using the alternate boot CD, then had to go to the rescue prompt to install the current Nvidia drivers.

[Tanker Bob]

If you have a 6, 7, or 8800 nVidia card, do not install the latest 295.40 nVidia driver. Stay with 295.33. 295.40 has acknowledged breaks with regards to these cards and will not work properly if at all in 3D mode.

[oldfred]

If nVidia you probably need nomodeset.

How to set NOMODESET and other kernel boot options in grub2
http://ubuntuforums.org/showthread.php?t=1613132
https://help.ubuntu.com/community/BootOptions
I had to do this with my Nvidia 9600GT:
To install Ubuntu, boot from the cd press any key at accessibility circle and keyboard, press F6 and then select the nomodeset option.
USB boot - At the menu press tab on the first option to edit the boot options and replaced the 'splash' option with 'nomodeset'.
then
On first boot after install, press e on getting the GRUB bootloader.
Hold shift from BIOS boot to get menu if only one system installed.
Using arrow keys navigate to and delete quiet and splash and type the word nomodeset in their place
Press Ctrl and X to boot (low graphics mode), install nVidia driver suggested my Ubuntu

Natty or later Video issues. MAFoElffen
http://ubuntuforums.org/showthread.php?t=1743535

If booting from USB it just may be easier to edit syslinux with whatever boot parameters you need like this:
Ubuntu 12.04 has been officially released and, with minor adjustments, the intel gma500 video card is working out of the box.
http://blog.bodhizazen.net/
simply edit “syslinux.cfg”

[whatthefunk]

I ended up using the alternate boot CD, then had to go to the rescue prompt to install the current Nvidia drivers.

Did the same thing, but used old drivers...the new ones were what was causing the problems for me.