On Fri, Jan 19, 2018 at 08:38:20AM +0100, Enrico Mioso wrote: > I forgot one last question. Is there any way I can force the system > to switch to the ATI card without installing a graphical environment, > just out of curiosity? As you've observed correctly, your particular machine isn't capable of muxing the display, it's a muxless model. Nowadays a mux is only found on MacBook Pros (can switch at runtime) and a few gaming laptops (can only switch in BIOS). On supported (i.e., pre-retina) MacBook Pros, it is indeed possible to switch to the discrete GPU without a graphical environment, in fact no graphical environment is even allowed to run currently. If by "force the system to switch" you're not referring to muxing the display but rather exercising (and thus powering on) the discrete GPU, I believe you do need a graphical environment to start a client with DRI_PRIME. Failing that, you can try to force the GPU out of runtime suspend with "echo on > /sys/bus/pci/devices/0000:01:00.0/power/control". (Use "echo auto" to re-enable automatic power management.) Kind regards, Lukas _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
