This is a draft on what works for the ASUS X13 to turn off the dGPU completely (even though hybrid graphics with an auto suspending dGPU works, this is an experiement).
- dGPU is on and still consuming power (> 20W, ney)
- dGPU not in device tree (to be expected)
- dGPU is off (yay)
- dGPU still in device tree (not removed)
- system crashes (ney - after lspci or the system requests the GPUs, like when launching apps)
- dGPU is off (yay)
- dGPU not in device tree (to be expected)
- system is stable (yay)
supergfxctl does not turn off the dGPU even though it is not in the PCI device tree after setting the mode to integrated
It made me curious if this machine uses the old GPU off methods like in the 2020 G14 (before BIOS 216) where we had to unbind the dGPU from the nvidia driver and use acpi_call to power off the dGPU.
This though (just using acpi_call to power device off and leaving it in the device tree) resulted in hard resets of the whole device when the PCI bus got rescanned or a graphical application wanted to have a look at the available GPUs.
By just removing the device from the tree succeeded though in a stable environment with the dPGU off.
I'm not sure why supergfxctl doesn't do the trick at the moment as I thought the behaviour would be the same as the device is also not available in the device tree after selecting integrated.
- remove
supergfxctl / gpu-manager / optimus-manageror whatever you might use for switching GPU modes - check for remaining files in
/etc/modprobe.d/withnvidiareferences, back them up and delete them - check for remaining files in
/etc/modules-load.d/withnvidiareferences, back them up and delete them git clone https://github.com/hyphone/asus-x13-gpu-switching.gitcd asus-x13-gpu-switchingsudo ./installto install the scripts and servicessystemctl start asusgpuswitchto switch between hybrid and integrated