Mid-air comment collision. My comment: 1) I have now tried nvidia.prime=intel, but unfortunately that did not make a difference: https://imgur.com/a/SvJfthS 2) I also tried it in combination with modprobe.blacklist=nvidia, but that did not help either. (Which is no surprise, since disabling all nvidia drivers made no difference: https://imgur.com/a/1tX1HoL) 3) Given that the suspicious "can't change power state from D3cold to D0 (config space inaccessible)" message comes from xhci_hcd, and the issue occurs just the same when using module_blacklist on *all* nvidia modules (https://imgur.com/a/1tX1HoL), this issue does not seem to be related to nvidia at all. 4) On reddit, u/ditzypoet made me aware (https://www.reddit.com/r/openSUSE/comments/ppyfcd/optimus_laptop_hangs_on_boot_after_yesterdays/hd7l5u8/) of this repository: https://github.com/ReimuNotMoe/Linux-on-GK5CP6V-S Therefore, I tried to boot with the following kernel params: linuxefi /boot/vmlinuz-5.14.2-1-default root=/dev/mapper/system-root ${extra_cmdline} noresume mitigations=auto pci=nommconf acpi_osi=Linux intel_iommu=off However, that did not make any difference: https://imgur.com/a/iK9rlXQ -- My response: @Takashi Iwai Thank you for your hint! I will try this kernel. Probably I need to only disable secure boot in the bios setup? I'll let you know when I figured this out and tried the kernel!