Comment 3 for bug 970040

Running 12.04, Unity 2D, Ndivia 6150 chip, Nvidia driver 304.51, running on an external monitor, with the laptop monitor disabled.
After a recent update on 9/25 or 9/26, the launcher, which is set to autohide, does not appear when moving the mouse to the left side. Workaround is to use the left Window button to get the Dash/launcher, select the "System settings"/appearance/behavior and turn off autohide, so the launcher is always present. Usinging the laptop display instead of the external monitor does not fix the problem.