I installed steam for ubuntu , so I tried to launch it and i get this :

~$ steam

Installing breakpad exception handler for appid(steam)/version(1352224866_client)



~$ lsb_release -a

No LSB modules are available.

Distributor ID: Ubuntu

Description:    Ubuntu 12.10

Release:    12.10

Codename:   quantal





~$ lspci | grep VGA

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Whistler XT [AMD Radeon HD 6700M Series] (rev ff)

What is the problem and how to fix it?