Comment 19 for bug 742544

I'm experiencing the same problem with my dual-monitor setup (with a nvidia graphics card) in unity (3d).

this is my setup: latop -----> second monitor (via VGA cable) to the right

When I use the Nvidia X Server Settings tool to expand my desktop to the second monitor (TwinView), the launcher (including the ubuntu botton on top) ends up in the middle of the two monitors, or if you will, on the left edge of the right monitor. My primary monitor is my laptop, to which I've connect an additional monitor to the right. So when I connect the right monitor, I definitely want the launcher to stay at the left most monitor, which is my laptop.

I found a "workaround" for this problem, but its definitely not how it should be:

1.) in Nvidia X Settings tool select TwinView for the second monitor AND tick the checkbox "Make this the primary display for the X screen" on the laptop (not on the second monitor, this is important)
2.) click "apply"
3.) now, the launcher will be on the left edge of the second monitor, even though we told nvidia x settings to make the laptop be our primary monitor!!
4.) now disable the second monitor and click "apply" again
5.) redo step 1 and 2 and the launcher should be on the laptop's screen (the left most in my setup) on the left edge

Setting up the monitors as described above is the only way I get launcher to position on the left most monitor!