[SOLVED]Hanging after booting from installation media

Question

Yesterday I booted from a rw-DVD got to the terminal and could execute commands, connect to the internet and use elink etc no problem. I didn't go through with installation as I wanted to read up more on partitioning my drives for dual booting before actually doing so.
Trying the same thing today, and it hangs soon after I boot, regardless of whether I do anything. Printing the following:
nouveau E[ DRM] failed to idle channel 0xcccc0000 [DRM]
pci_pm_runtime_suspend(): nouveau_pmops_runtime_suspend+0x0/0xf0 [nouveau] returns -16
INFO: rcu_preempt detected stalls on CPUs/tasks: { 6} (detected by 1, t=18002 jiffiess, g=974, c=973, q=604)
This is without me typing anything. If I try to execute a command quickly after booting it sometimes works, but after a couple of minutes it will complain of a soft lockup.
I've tried burning another disk, and using a USB installation media, but the same thing happens. Any thoughts?
Edit: Trying to run it on a laptop with i7-4700MQ, 16GB ram, and Intel(R) HD Graphics 4600 / NVIDIA GeForce GTX 770M
Second Edit: Booted with nomodeset, which worked and allowed me to install. Just trying to sort out the sodding boot loaders now...
Last edited by glfharris (2014-07-11 22:42:31)

Answer 1

Welcome to the forum.
First of all, you should get in the habit of using [ code ] tags when posting code, not [ quote ] tags (well, unless you want to apply some styling to it, like bold, italic, etc).
This is wrong:
# umount /dev/sdc
This is correct:
# umount /dev/sdc1
You were trying to unmount the drive as a whole, which obviously isn't mounted, instead of the first (and probably only) partition. Had you followed the advice from the note to use blkid and check if it's mounted, this wouldn't have happened. But the fact that a DVD produced that error puzzles me... I have no experience with UEFI, but I think you need to press F10, F11, or something like that, to able able to get to a UEFI boot menu, and choose the optical unit as source.
I hope you used a BitTorrent client when downloading the ISO, and not some direct link (which are prone to CRC errors). If you used a direct link, then check the MD5 and make sure that it matches the one from the Download page. For future reference, torrents are checked while they're being downloaded.