GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
power: N/A
hibernate: OK (AC, AC), OK (AC, AC), OK (BAT, BAT)

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force"
power: 9.33W
hibernate: NOK (BAT, BAT)

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_fbc=1"
power: 8.72W, 9.12W, N/A, 9.64W ... N/A
hibernate: OK, OK, NOK (BAT, AC), OK (AC, BAT), OK (AC, AC), OK (AC, BAT), OK (BAT, BAT), OK (AC, AC)

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.enable_fbc=1 i915.enable_rc6=7"
power: 7.73W, N/A, 7.70W
hibernate: OK (BAT, BAT), OK (AC, AC), OK (AC, BAT)

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pcie_aspm=force i915.enable_fbc=1 i915.enable_rc6=7"
power: 8.06W,
hibernate: OK (BAT, BAT), NOK (AC, AC)