Same problem! Here’s the workaround I found. Hopefully my efforts will assist someone else, and point to a permanent fix.
Hardware: Mobo: MSI A78-E35 BIOS: E77221AMS V30.2 Build Date: 02/21/2014 CPU: AMD A8-5600K APU with Radeon HD Graphics Mem: ADATA XPG V1.0 DDR3 1600, 8GB PS: 680W (Installing Ubuntu 14.04 server from CD but assume the results would be the same via USB load) After reading a post somewhere where the writer thought that the issue might be related to an “inactivity” timer and said he had some level of success with continuously moving his mouse during boot, I tried some combinations of this and have been able to boot and make a stable environment to work in. Being a complete Noob to all of this, I am not sure exactly why this works, but it is repeatable and might help lead to something that would help sort this out. I was able to run through the entire server load process by continuously moving my mouse during the entire process. Yes you need to type and make selections to configure your server while constantly moving the mouse, and no I didn’t try stopping because I wanted to get it loaded. It went flawlessly! A real PITA, but it worked. Next I found that I was able to boot by holding one of the <SHIFT> keys the entire time the system is booting, but I get varying results. Seems like about 4 out of 5 times through the boot process, I am presented with a small font login prompt to my server. As soon as I release the <SHIFT> key the system reloads and it’s time to hold the shift key again. About the 5th time through, I get a text menu that looks like this: *Ubuntu Advanced options for Ubuntu Memory test (memtest86+) Memory test (memtest86+, serial console 115200) When this text menu appears, you can release the shift key and work without holding it throughout the rest of the process. Now, if I just select Ubuntu, I go back into the boot loop. Hold the shift again! In the Advanced Options menu, I get two options; *Ubuntu with Linux 3.13.0-24-generic Ubuntu with Linux 3.13.0-24-generic (recovery mode) Selecting the Non-Recovery option takes me back to the boot loop, but selecting the Recovery Mode option gives me a colored text Recovery menu with eight options, all of which seem work with no problem. At this point I select the first option, <resume>, and <ok> on the following screen that warns that “graphic drivers require a full graphical boot and so will fail when resuming from recovery”. Now my server (RIX-ubuntu1) boots to a large font prompt: Ubuntu 14.04 LTS RIX-ubuntu1 tty1 RIX-ubuntu1 login: At this point I am able to login normally and the server will run without issue until it loses power, needs to be reloaded for maintenance, or any other reason you might have. This looks like a work–around, not a fix but it has allowed me to work in 14.04 without any other issues. I would love to know if this is repeatable for anyone else, and if some of you smarter more experienced users can use this to further refine the quest for a fix. Enjoy! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1309578 Title: Ubuntu 14.04 suddenly reboots when booting from Live USB AMD A8 6600k To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309578/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
