From the AMD website I got this:Yes, bios update didn't make any difference for me. I'll uninstall the proprietary drivers and try open-source drivers once again when I can afford some downtime. I'll post my findings.
AMD Dynamic Switchable Graphics technology requires either an AMD “A” series APU or an Intel processor, plus an AMD Radeon™ discrete graphics configuration and is available on Windows® 7 Professional, Windows® 7 Ultimate, Windows® 7 Home Premium, and/or Windows® 7 Home Basic OS. Linux OS supports manual switching which requires restart of X-Server to switch between graphics solutions. With AMD Dynamic Switchable Graphics technology, full enablement of all discrete graphics video and display features may not be supported on all systems (e.g. OpenGL applications will run on the integrated GPU or the APU as the case may be). Always check with your system manufacturer for specific mode capabilities and supported technologies.
Another thing, did you change the mode to Fixed in the bios? I read somewhere that it solved some people's problems regarding switching between the cards. Please let us know if you have any progress on this. I've been planning to buy this laptop for a while now and it's getting delayed due to these issues that keep popping up. I'm planning to buy this next week (can't delay any more than that).