Lenovo ThinkPad X250

General Specs

 * Model Number: 20CM004UGE
 * Processor: Intel Core i7-5600U vPro
 * Memory: 8GB
 * HDD: 512GB SSD
 * Graphics: Intel HD Graphics 4400

Additional Information

 * Intel® Core™ i7-5600U Dual-Core Processor (Broadwell) with 4 MB Cache and 2x 2.60 GHz with TurboBoost up to zu 3.2 GHz,
 * Intel® vPro-technology
 * 8 GB 1600 MHz DDR3L RAM,
 * 512 GB SSD eDrive SATA 6.0Gb/s (2.5") HDD,
 * Intel HD Graphics 4400,
 * 31.75 cm (12.5") full HD, non-glare IPS-Display, 400 NITS,
 * Intel Dual Band Wireless-AC 7265,
 * Integrated UMTS module: Sierra Wireless EM7345, 4G LTE/HSPA/GSM/GPRS/EDGE, GPS,
 * Bluetooth 4.0, HD720p Low-Light-Sensitive Webcam with Face-Tracking and fixed Focus,
 * Fingerprint Sensor with LED and TPM (TCG 1.2) Security Chip,
 * 3 + 3 Cell Accumulator with up to 10.7 hours run time,
 * 4-in-1 Multicard Reader (MMC, SD, SDHC, SDXC), Express Card/34 slot,
 * 2x USB 3.0 (1x powered), VGA, Mini-Display Port and Ethernet (RJ-45),
 * Docking Port,
 * TrackPoint® and UltraNav™ Multitouch Touchpad, keyboard with background light,
 * Dimensions: 305.5 mm x 208.5 mm x 20.3 mm and only 1.42 kg mass (incl. battery),

Add Ons
In addition Lenovo ThinkPad Pro Dock - 90W, EU (FRU: 40A10090EU) together with X250 is working with USB mouse & keyboard and external monitor

3x USB 3.0, 2x USB 2.0, 1x USB 2.0 with Always-on-USB support, 1x VGA (max. 1.920 x 1.200 resolution), 1x DVI (max. 1.920 x 1.200 resolution), 1x Display Port 1.2 (max. 2.560 x 1.600 resolution), 1x 10/1000 Gigabit Ethernet (RJ45), 1x Combo-Audio-port for Headset with microphone & Slot for Kensington lock

Devices
Chipset:

General Comments
2018-01-28: Installation of AOS5.0.1 went successful, also installation of eCS2.2BetaII - both from external DVD-Drive (USB), USB only stable with the branch of Lars Erdmann

Old: Installation on X250 from USB-CD/DVD-ROM failed. eCS v2.1 started up to maintenance screen bot no HDD was found. eCS v2.2 Beta II even did not start up from CD/DVD-ROM. I tried to clone my existing system using DFSee and finally worked after some trouble with partition alignment. Status now on X250 is a working eCS v.2.1 with ACPI showing 4 cores, full support of native screen resolution via PANORAMA, working USB (mouse and thumb drive tested as well as USB keyboard in docking station) after disabling USB3.0 in BIOS.

Audio
There had been reported on the OS2World forum to make the Uniaud driver to work om this model.

The try the following command on Startup.cmd unimix -id1 -val87 -cnt0 unimix -id1 -val87 -cnt1 It is possible that newer version of Uniaud will include this settings.

Hardware Manager Report

 * Lenovo ThinkPad X250 Hardware Report

Links

 * OS2World Forum: UNIAUD Update: Thinkpad X250 - The Perfect ArcaOS Laptop