In Fresh install of 7.10, can't get working: 1) dual-monitor setup and 2) high resolution

[Marius Gedminas]

On Sat, Oct 20, 2007 at 01:07:17PM -0700, Ubbu wrote:
>  I have just fresh/clean-installed Ubuntu 7.10 Gutsy Gibbon. I was
> previously using Ubuntu 7.04 Feisty Fawn, where I was able to get a
> dual monitor (side-by-side) setup working by tweaking the xorg.conf.
> (By the way, I no longer have a copy of my older Feisty-era xorg.conf.
> It was erased with the rest of my hard drive.)
...
> a) lspci: http://paste.ubuntu-nl.org/41402/

You have an ATI Radeon.  The radeon driver is now able to configure
dual monitors dynamically with xrandr, but it lost the support for
old-style xorg.conf configuration.

Here's what Ubuntu 7.10 release notes tell you:

  Dual-head (multi-screen) setups

    * The ati driver has dropped MergedFB / Xinerama support in favour
      of xrandr 1.2 support, and old multi-head xorg.conf setups will
      break. To set up dual-head see the guides at
      http://www.intellinuxgraphics.org/dualhead.html or
      http://wiki.debian.org/XStrikeForce/HowToRandR12

    * As xrandr and xinerama are incompatible, you cannot mix some
      graphics cards using xrandr-enabled drivers with others that are
      still limited to using xinerama. In this case, you will need to
      revert to pre-xrandr versions of the respective drivers: for Intel
      cards, use the old "i810" driver instead of "intel", for ATI
      cards, use the old 6.6 version.

    * With xrandr, it is now possible to use Compiz in a multi-screen
      setup, however it is dependent on available video card memory. The
      workaround for this issue is to switch to a lower virtual
      resolution.

    -- http://www.ubuntu.com/getubuntu/releasenotes/710

Marius Gedminas
-- 
Q:      What's tiny and yellow and very, very, dangerous?
A:      A canary with the super-user password.
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