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Monday, 25 January 2010

ATI/ATI switchable graphics

One of the possible configurations for switchable graphics laptops is the ATI/ATI hybrid. Instead of having two physically separated cards, ATI (now AMD) produces a card with two chipsets. For example, the HP dm3 laptop series comes with a ATI HD3200/HD4300 configuration. Another one is the ASUS M51Ta, that also comes with two ATI chipsets:

01:05.0 VGA compatible controller: ATI Technologies Inc RS780M/RS780MN [Radeon HD 3200 Graphics]
02:00.0 VGA compatible controller: ATI Technologies Inc Mobility Radeon HD 3650

This configuration has proven difficult to support under Linux so far, although most of the relevant documentation is available through the ATI Open Source program. One of the HP dm3 users has produced a log on the Windows drivers. Hopefully, this information will be enough to contribute in having ATI/ATI switchable graphics for Linux in the near future: