View source for TestCase Generic video multihead

== Description ==
This test case tests whether multiple displays worksuccessfully with the ''nouveau, radeon or intel''  driver, andwhether desktop environments handle multiple displays  correctly. Youwill need at least two displays connected to your ''nouveau, radeonor intel'' video adapter to perform this test.

=== Setup ===
* Connect as many displays as you can to the available ports on your display adapter

* Ensure  the 'nomodeset' and 'nouveau.modeset=0, radeon.modeset=0 or  i915.modeset=0' kernel parameters are not set in your bootloader  configuration.

You can see your current kernel options by running cat /proc/cmdline

* Ensure the file /etc/X11/xorg.conf does not exist, or is a valid file that uses the ''nouveau, radeon or intel'' driver

* Shut your system down entirely, then start it up again

* If using a live image to test, ignore the above steps and simply boot the system from the live image with default options

=== How to test ===
* Verify that the graphical environment starts correctly and is spanned across all connected displays

* Open a console and run the command xrandr. Take a copy of the results

* Disconnect  and then re-connect one or more displays; do this several times. If you  are using a docking station for a laptop, try removing the laptop from  and restoring the laptop to it several times

* Run your  desktop's display configuration tool. For GNOME 2 (up to Fedora 14),  this is gnome-display-properties. For GNOME 3 (Fedora 15 and on), this  is gnome-control-center display. For desktops without their own tool,  you can use the command line xrandr utility. Verify that it correctly  shows each of the connected displays (monitors). Test re-arranging,  enabling, disabling and configuring displays

=== ExpectedResults ===
* xrandr should report each connected display and the correct available modes on each

* Both  X and the graphical environment should cope smoothly with displays  being disconnected and reconnected while the system is running: the  displays should be correctly added or removed by X, and the graphical  environment should correctly adjust itself to the added or removed  display

* Configuration tools should allow you to  arrange the displays in any configuration, enable and disable displays,  and change each display's settings; these changes should work and be  reflected in what each display actually shows