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I have the following problem:

I have 2 hard disks on my pc. My first disk is a 500 GB hd and I have got Ubuntu 12.04 installed a long time now. My second disk is a 2TB disk in which I just installed windows 7 x64.

Everything was just fine, but 3 days ago I installed SAPPHIRE HD 7770 GHz Edition OC 1GB GDDR5 in my system. GRUB menu (which I tweaked through this post : I can't get grub menu to show up during boot ) after the installation of the new graphics card boots normally into Windows but it will not boot under any circumnstances on my Ubuntu 12.04 ('Check signal cable message') . I even tried with a live cd it just went to black screen again 5 seconds after it had started.

I have got some serious projects on my Ubuntu since it is the primary OS that I am using so a little help would be much appreciated.

My system: ASUS motherboard 2 hard drives just I mentioned, my new graphics card SAPPHIRE HD 7770 GHz Edition OC 1GB GDDR5, RAM: 2 X 4 GB , processor : AMD A4 3400 CPU with embedded graphics card(that I am not using anymore).

PS: Note that it worked well up until 4 days ago, without the new graphics card.

Please help me if you can. Thanks in advance.

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Paul
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1 Answers1

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It sometimes happens when you buy a new graphics card that has an AMD GPU that the graphics card is so new that the latest version of the AMD Catalyst graphics driver for Linux doesn't work on Ubuntu. Sometimes it takes AMD a few months for their latest Catalyst graphics driver for Linux to catch up with the newest models of graphics cards.

There are instructions for how to install the latest AMD Catalyst graphics driver in the answers to the question: Ubuntu 14.04.5/16.04/16.10 and AMD graphics.

Sometimes however you can simply install the fglrx package from the default Ubuntu repositories, and it will work just fine, even with one of the newest models of graphics cards that has an AMD GPU. fglrx is a video driver for the AMD Radeon and FireGL graphics accelerators for Ubuntu 12.04-14.04.

karel
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