[РЕШЕНО] Деактивация дискретной nVidia на MacbookPro

> $ sudo ls /sys/kernel/debug
acpi           fault_around_bytes  mce               sched_features
bdi            frontswap           mei0              sleep_time
bluetooth      gpio                pinctrl           split_huge_pages
cleancache     hid                 pkg_temp_thermal  suspend_stats
clk            ieee80211           pm_genpd          tracing
dma_buf        iio                 pm_qos            usb
dri            intel_powerclamp    pstate_snb        wakeup_sources
dynamic_debug  kprobes             ras               x86
extfrag        kvm                 regmap            zswap

There are two versions of hybrd graphics: MUXed and MUX-less. MUXed have a display MUX to switch the displays between the discrete and integrated cards. MUXed systems can be switched using vgaswitcheroo. MUX-less do not have a display MUX and the displays are only connected to the integrated card. On MUX-less systems, the discrete card is solely for rendering, not display. X Server 1.14 is required to support rendering and display from different cards. Most new laptops (2011+) are MUX-less.

MUXed have a display MUX to switch the displays between the discrete and integrated cards.

menuentry "Arch Linux" {
        icon     /EFI/BOOT/icons/os_arch.png
        volume   "[b]ArchLinux[/b]"
        loader   /vmlinuz-linux
        initrd   /initramfs-linux.img
        options  "root=PARTUUID=c9755d6e-85c8-4119-9b98-abb96d1f8a1d rw add_efi_memmap"
        submenuentry "Boot using fallback initramfs" {
                initrd /initramfs-linux-fallback.img
        }
        submenuentry "Boot to terminal" {
                add_options "systemd.unit=multi-user.target"
        }
}

firefoxic

> $ sudo cat /sys/kernel/debug/vgaswitcheroo/switch
cat: /sys/kernel/debug/vgaswitcheroo/switch: No such file or directory

> $ ls /usr/share/X11/xorg.conf.d
10-quirks.conf  40-libinput.conf  70-synaptics.conf  nvidia-drm-outputclass.conf

# This xorg.conf.d configuration snippet configures the X server to
# automatically load the nvidia X driver when it detects a device driven by the
# nvidia-drm.ko kernel module.  Please note that this only works on Linux kernels
# version 3.9 or higher with CONFIG_DRM enabled, and only if the nvidia-drm.ko
# kernel module is loaded before the X server is started.

Section "OutputClass"
	Identifier      "nvidia"
	MatchDriver     "nvidia-drm"
	Driver          "nvidia"
EndSection

mount /dev/sda1 /mnt/boot