Hi,

I run Ubuntu 14.04 on a Lenovo s440 Thinkpad with an extra monitor (Built-in: 1366x768, extra monitor: Samsung SyncMaster 2443 - 1920x1200). The laptop has two GPUs (Integrated: Intel HD 4400, Discrete: Radeon HD 8670M).

I use proprietary drivers (fglrx). Switching between GPUs is done with Catalyst Control Centre.

When I am using the discrete GPU, I cannot properly drag monitors (in All Settings>Displays) to change their position, because the screen output gets scattered over the two monitors - as can be seen in the attached images. When I'm using the integrated GPU the problem does not occur.

Does anybody know a way to fix this?

Cheers,
Manje

screen_left.jpgscreen_right.jpg