Sorry for the delay, I can confirm the bug persists when using the Open-source drivers (AMD). But I also had the same "problem" while using the proprietary Nvidia drivers on my laptop (it has dual-graphics with an integrated Intel one).
Images with the open-source drivers (all fglrx-* packages removed): http://imgur.com/a/7IjNb
Sorry for the delay, I can confirm the bug persists when using the Open-source drivers (AMD). But I also had the same "problem" while using the proprietary Nvidia drivers on my laptop (it has dual-graphics with an integrated Intel one). imgur.com/ a/7IjNb
Images with the open-source drivers (all fglrx-* packages removed): http://