Lenovo ThinkPad x121e
Note that there are several models of this laptop. The notes below refer to the model with the following specification and options:
- Intel(R) Core(TM) i3-2367M CPU @ 1.40GHz GenuineIntel
- Intel Centrino Wireless-N 1000 (Note: this is not the default option)
- US keyboard with Euro
- 320G HDD
Working out of the box:
- wifi (with Intel Centrino Wireless-N 1000 option)
- sound (with ALSA)
- most function keys
- suspend to RAM
- suspend to disk
- boot from MBR partitioned disk in BIOS mode
- 2 "Think" LEDs
- HDD in AHCI mode
- boot from USB key, USB HDD, internal HDD
Working but not out of the box:
- boot from GPT partitioned disk in UEFI mode (with hack to work around buggy firmware - see below)
- bluetooth (with BIOS upgrade - see below)
- VGA out to external monitor (connection generally goes OK but disconnect frequently freezes X and sometimes causes hard lock up forcing cold reboot; could be configuration or DE related - see below)
- boot from GPT partitioned disk in BIOS mode
- HDMI out
- SD card reader
- security chip thing
- boot from USB FDD, network boot
Arch user blogs about the x121e
Power saving options for the x121e
In /etc/rc.conf, add acpi-cpufreq to the MODULES array to enable CPU frequency scaling. If you use laptop-mode-tools, that's enough. Otherwise, add the governor you want to use, too e.g. cpufreq_ondemand.
Then add the following to the DAEMONS array:
- either laptop-mode or cpufreq
- sensors (if you want to monitor fan speed, temperature etc.)
thinkpad_acpi should be loaded automatically. Check this with lsmod | grep think.
Add to the kernel command line:
pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 i915.semaphores=1
If using laptop-mode-tools stops your machine from shutting down while on battery power, try setting the following configuration line in /etc/laptop-mode/conf.d/runtime-pm.conf:
tp_smapi does not currently support the x121e and is apparently not likely to do so in the foreseeable future. Apparently the x121e is not quite a "real" ThinkPad.
Some people experience difficulties booting if their disk is partitioned using a GPT partition map. It may work to use a GPT partition map, UEFI boot and a fat 16 formatted EFI partition (this violates UEFI spec but may have the advantage of actually working). See https://bbs.archlinux.org/viewtopic.php?id=131149 and https://bbs.archlinux.org/viewtopic.php?id=133074.
If bluetooth doesn't work or stops working and cannot be unblocked by rfkill, check that it is enabled in the BIOS. If that's not the problem, a BIOS upgrade may help. See https://bbs.archlinux.org/viewtopic.php?id=137346.
Speed up trackpoint: https://bbs.archlinux.org/viewtopic.php?id=130130.
Solution for difficulties suspending or hibernating: https://bbs.archlinux.org/viewtopic.php?id=125011.
VGA disconnect problems: https://bbs.archlinux.org/viewtopic.php?id=134886.