Lenovo ThinkPad X220
The graphic card is supported by the xf86-video-intel driver package from the extra repository. The Xorg server makes use of this automatically. There's no need for a Xorg configuration file.
pacman -S xf86-video-intel
The X220 cannot boot from a GPT disk with legacy BIOS, so either use an MBR disk or setup UEFI.
According to a forum post you should set some power saving options in /etc/modprobe.d/modprobe.conf or add them to your kernel line in your menu.lst. We use rc6=7 for deepest sleep mode.
options i915 modeset=1 options i915 i915_enable_rc6=7 options i915 i915_enable_fbc=1 options i915 lvds_downclock=1
As well you could suffer of Kernel Power Regressions.
Reboot loop after resume from suspend!
This can be caused by the EFI storage getting too full. Run the following commands as root to free up some space.
# First clear the pstore mkdir -p /dev/pstore mount -t pstore pstore /dev/pstore ls /dev/pstore # <- Nothing important should be here, but check first anyway rm /dev/pstore/*
# Next some EFI variables. These are used/created by pstore, but I've had them even though #I deleted the pstore data using the above commands. YMMV. rm /sys/firmware/efi/efivars/dump-type0-*
This information was taken from the Lenovo forums
- Arch user blogs about the X220
- Thinkwiki X220 reference
- "Arch By Hand" UEFI GPT SSD LUKS Install Script, built on an x220 tablet with an SSD.
- Power saving options for the X220 - Notebook Review Forum