Walls blinking

[malloc]

Hello
I have a acer ao756 with a SOC (system on chip) Pentium B987 + Intel HD Graphics that is based on the HD Graphics 2000 and Lubuntu 12.10.

When I run Amnesia walls blink.
Closing the window a strange rectangle appears in the upper left of the screen. The windows are not drawn on this rectangle and only displays the desktop.

This made me think the driver error and googling a bit I found:

https://launchpad.net/~xorg-edgers/+archive/ppa

I updated the drivers to the beta version:
"
sudo add-apt-repository ppa:xorg-edgers/ppa
sudo apt-get update
sudo apt-get dist-upgrade
"

Reboot and the game looks perfect now.
Although the mysterious rectangle still appears xD I will report on the Ubuntu forums.

Thank you for this game and make it work in linux.

greetings

edited: link broken, new link