[Bug 383345] Re: dual screen not working: just a blank screen with a mouse pointer

[Lucian Adrian Grijincu]

1. I selected a resolution that works fine if the Virtual line is not
present in xorg.conf: both screens at 1024x786, and I added the Virtual
line to xorg.conf.

After restarting gdm I was greeted by the same blank screen with a mouse
pointer.

2. Taking a suggestion from https://wiki.ubuntu.com/X/Troubleshooting, I tried adding 
        Option          "DRI" "false"
while still having the "Virtual" line in xorg.conf. Unfortunately, after restating gdm I was left with the same blank screen.

3. As suggested in xorg.conf, I ran
    sudo dpkg-reconfigure -phigh xserver-xorg
and I was left with a xorg.conf with no "Virtual" line, with which I could use dual-screen without mirroring for some configurations that do not need the Virtual line.

-- 
dual screen not working: just a blank screen with a mouse pointer
https://bugs.launchpad.net/bugs/383345
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