I'm having a lot of problems with installing the ATI Radeon driver for my computer.

I have:

• ATI Radeon HD7870 graphics card.
• Linux Mint 14 Nadia installed with Cinnamon x64
• Two monitors wich I would like to use as one desktop. (haven't made it here yet)

My installation is a fresh installation so I have only tried installing the drivers and here's how I did that:http://wiki.cchtml.com/index.php/Ubuntu_Natty_Installation_Guide I used this installation guide.

1. First, since it was a fresh installation, I made sure my installation was up to date (apt-get update, upgrade and dist-upgrade).
2. Then I installed the prerequisite packages and the ia32-libs as described in the installation guide.
3. Thirdly, I go to ATI webpage and get the newest stable drivers for my graphics card, 12.10 for 64-bit system.

4. I run the following installation commands:

   sh ./amd-driver-installer-12-10-x86.x86_64.run --buildpkg Ubuntu
   sudo dpkg -i fglrx*.deb
   sudo amdconfig --initial -f
   

   That's it. I don't remember any errors, but I don't remember looking for any either.

Now when I restart the comp and log back in, the taskbar for Cinnamon is changed to something that looks more like GNOME. When I try to run the "AMD Catalyst Control Center" from system settings I got a popup saying initialization error. Then I try to run the command for checking version of fglrx and I get this:

    $ fglrxinfo
    Segmentation error

Does anyone recognize this error and can tell me what's wrong?

I haven't played with Cinnamon yet, but I've heard that there are problems with it while running the latest drivers. Also have you got your 32bit Mesa Libraries (e.g.  libgl1-mesa-glx)?

I found it best to just go through the auto-installation rather than building distro specific packages since you're running Linux Mint anyway. I've also noticed you didn't mention what version of drivers you are attempting to use.