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I'm getting confused about why it wont work. We have a Dell partner, and we asked specifically for dual monitor (*they sold us two monitors at the same time!). I knew Ubuntu support would be ok,, but unlikely to get any from Dell itself.

I can't get the second monitor to appear. I've installed:

fglrx:amd64 (9.010-0ubuntu3)
fglrx-amdcccle:amd64 (9.010-0ubuntu3, automatic)

But Settings wont detect the second monitor.

lachlan@keilorpark:~$ lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Caicos XT [Radeon HD 7470]
03:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Caicos XT [Radeon HD 7470]
lachlan@keilorpark:~$ fglrxinfo 
display: :0  screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7000 series
OpenGL version string: 4.2.11986 Compatibility Profile Context

What am I doing wrong?

The installation advice page recommends the following for dual monitors for those that are installing the native drivers. I know I didn't, but I figured I'd try:

lachlan@keilorpark:~$ sudo amdconfig --initial -f
amdconfig: No supported adapters detected

I didn't even run the second line.

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I'm very confused about how I did it, but now working. I uninstalled fglrx* completely in an effort to get the latest and greatest running. But as soon as I rebooted after the removal of those packages I tested (just in case) and dual screen was working.

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That's because now you are using the default open source driver. You should only use the proprietary amd driver if you need them to play some games and such things, because amd does not care much about them. – verpfeilt Sep 4 '13 at 21:53

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