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I'm running Ubuntu 13.04 on a desktop I built myself, and I've been having an issue for a few weeks now.

I installed an update for my system a while ago, and when I restarted, it would log me in, and then nothing would happen. It still shows that I connect to my wireless network, which shows me that the system itself is still working, but the only thing on my screen is my mouse cursor, which is still responsive. I can also press ctrl+alt+T for terminal and log out using ctrl+alt+del.

I've tried searching online for a fix, because I have an inkling that it has something to do with the desktop environment thing, but obviously I don't know the proper terminology, and that's made it pretty hard to find a solution! If someone could point me in the right direction, and hopefully tell me what the "environment" is called, it would be much appreciated!

I've tried the suggestions here , but the first one didn't work for me, and whenever I try to open TTY1/TTY2, my system doesn't work... It just shows a screen with all sorts of different colors, and it looks like it just bricked itself or something.

Thanks again!

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What is the model number of the graphics card in your computer if you have one? – karel Aug 1 '13 at 0:55
Hi, I have an AMD 7850. – ImBakinBacon Aug 1 '13 at 0:55

Your black screen, problem getting to your desktop environment and mosaic screen artifacts could all be caused by a graphics card driver issue. From the terminal type:

sudo apt-get install fglrx fglrx-amdcccle

...and reboot the system.

fglrx is the video driver for the AMD Radeon and FireGL graphics accelerators.

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I just tried this, and now when I boot up, I get a "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)" error. I've had troubles with the open source drivers in the past, so I had to install the drivers via downloading the packages from AMD's websites before. EDIT: Looks like it has nothing to do with the driver? Do I have to completely reinstall the OS now? It won't let me boot into safemode anymore either. – ImBakinBacon Aug 1 '13 at 1:12
Okay, so update on this again. Now when I boot up, the black screen occurs right after the GRUB Bootloader, so I can't access the terminal at all when booting normally. I can boot into safemode now, however. – ImBakinBacon Aug 1 '13 at 1:30
It's good that you can at least boot into safe mode. Your "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)" might be caused by a hardware issue of the desktop you built yourself. I recommend that you ask about this in a separate question because the threads that I have read on this topic get bogged down in a lot of hardware specific details. For this reason I also recommend that you add information about your CPU, RAM, hard drive and graphics card to your question. – karel Aug 1 '13 at 1:35

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