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Saturday, 24 March 2012

Fleshing out hotpluging of graphics devices on xserver -- David Airlie

David Airlie has been working on fleshing out the xserver code that will allow the server to activate added graphics hardware without requiring a restart:

Friday, 9 March 2012

vga_switcheroo receives updates in Linux Kernel 3.3

The vga_switcheroo driver, used to switch between graphics chips, has gained a number of functions for supporting Optimus, NVIDIA's technology for enabling and disabling a discrete graphics chip on demand.;a=commitdiff;h=d099230cc355c485e556121c034b1fca5a5fd18b
Newer nVidia cards with Optimus do not support/use the DSM switching functions. Instead, it require a DSM function to be called prior to bringing a device into D3 state. No other _DSM calls are necessary before/after enabling/disabling a device. Switching between discrete and integrated GPU is not supported by this Optimus _DSM call, therefore return on the switching method.