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[Phillip <Phil.aComposer@xxxxxxxxx>]

I have an AMD A8-6600K/MSI G71 FM2 Board. I was getting the reboot loop when installing 14.04 LTS. I used a workaround for this problem. I will explain below in noob terms.
1. install ubuntu. Keep your mouse moving the whole time and you will get through the install. It's tough but you can do it.
2. Once ubuntu is installed, reboot and press F6 during the motherboard screen to bring up ubuntu boot options
3. boot with low graphics and networking. 
4. in low graphics mode, open firefox and download the appropriate graphics drivers from AMD for your PC. Install them and reboot back into low graphics mode with networking
5. open terminal and type: "sudo gedit /etc/default/grub" and  Look for this text: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"  
6. Edit this section of code to read as follows:  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash noapic radeon.dpm=0"
7. save changes
8. you should now be able to boot in normal graphics mode. 

This workaround took me a while to figure out as I'm newer to ubuntu as
an operating system, but it has been stable running constantly at full
1080p graphics for four days now without a single crash or error.
Hopefully this works for more than just my system.

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1309578

Title:
  Ubuntu 14.04 suddenly reboots when booting from Live USB AMD A8 6600k

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I have a custom built AMD System with the following hardware currently
  running on Linux Mint 16 :

  AMD A8 6600k with Integrated graphics | MSI-FM2-A55M-E33 Motherboard |
  Kingston Hyperx Blu 4GB RAM | Corsair VS450 PSU

  Today when I tried to install 14.04 amd64 iso using a bootable USB,
  then the system rebooted. Any further attempts in installing it
  resulted in the same bug. As soon as I open the "Ubuntu installer"
  application and click "Continue" button then the system restarts after
  2-3 seconds.

  I asked the same on AskUbuntu and some more guys reported the same
  problem with AMD APU, so I believe it to be a genuine bug and not just
  with me.

  The BIOS version is the latest one downloaded from MSI official
  website which is version 11.5.

  Also an Interesting thing is that this bug is common with the latest
  iso of Arch Linux too, but when booting older distros like Linux Mint
  16 from USB, then everything works like it should, so it might have
  something to do with the newer 3.13 Kernel version.

  I am not an expert, but I can surely tell that only the newer distros
  are affected by this bug as reported by some other guys at AskUbuntu
  and the fact that Arch which is running the newer Kernel is having the
  same bug, so it probably has something to do with the newer Kernel,
  but I could be wrong.

  This bug is not letting me install Ubuntu 14.04 on my hardware and it
  is affecting a few more users too. Here is the AskUbuntu thread :
  http://askubuntu.com/questions/449391/unable-to-install-ubuntu-14-04
  -pc-restarts-after-i-click-continue-button-in

  I hope this gets fixed soon or with the 14.04.1 upcoming July release.

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