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[ubuntu] Aspire 7535G Ubuntu 12.04 and Radeon HD 4570

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http://ubuntuforums.org – HI all! I am a new linux user and have just installed ubuntu 12.04 onto my old laptop the acer aspire 7535G. Everything seemed to work right out the box, except for the graphics. The graphics adapter (which i had several problems with on windows) is a Mobility radeon HD 4570. Under windows it uses ATI`s power express software to switch from 3200 to 4570 depending on power source etc. Ubuntu came with a catalyst driver which seems to work nicely with the 3200, and there is an option to switch adapters, however this works to no effect. Laptop will either stick on reboot or just not switch (Hardware)