this is the output of grep PCI /var/log/Xorg.0.log when booting with grub-efi
Grub commandline: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.modeset=1 i915.lvds_use_ssc=0 i915.lvds_channel_mode=2"
/boot/grub/custom.cfg: ## Switch gmux to IGD outb 0x728 1 outb 0x710 2 outb 0x740 2 ## Power down ATI outb 0x750 0
this is the output of grep PCI /var/log/Xorg.0.log when booting with grub-efi
Grub commandline: LINUX_DEFAULT= "quiet splash i915.modeset=1 i915.lvds_use_ssc=0 i915.lvds_ channel_ mode=2"
GRUB_CMDLINE_
/boot/grub/ custom. cfg:
## Switch gmux to IGD
outb 0x728 1
outb 0x710 2
outb 0x740 2
## Power down ATI
outb 0x750 0