Hi Hans, On Thu, 2022-08-11 at 15:53 +0200, Hans de Goede wrote: > Hi, > > On 8/9/22 04:50, Luke D. Jones wrote: > > Support the hardware GPU MUX switch available on some models. This > > switch can toggle the MUX between: > > > > - 0, Dedicated mode > > - 1, Optimus mode > > > > Optimus mode is the regular iGPU + dGPU available, while dedicated > > mode switches the system to have only the dGPU available. > > > > Signed-off-by: Luke D. Jones <luke@xxxxxxxxxx> > > I see that you have replied to this that it needs more work. > > Besides it needing more work, ideally this should hook into > the existing vga-switcheroo mechanism for this. Can you take > a look at that please? > > I think this might be the first non GPU driver doing vga- > switcheroo stuff. So this may be something to discuss > on the dri-devel list. I'm not sure how this would work. In typical ASUS fashion they do non- standard stuff. This switch is a basic toggle that requires a reboot to enable after writing to the ACPI method, after reboot the dGPU becomes the only visible GPU on the system and (this GPU) can not be suspended. In short: it toggles the laptop from discrete-only mode, and optimus mode, requiring a reboot to switch. >From what I understand of switcheroo it is more to manage having dual (or more) GPU available during runtime, and manage the power states, offload etc. I have a vastly improved patch for this prepared now. Because of how the actual feature works (and the above explanation) it must be under the asus-nb-wmi sysfs (next to the dgpu_disable and egpu_enable toggles which are also unusual and non-standard work-arounds of Windows issues). Kind regards, Luke.
