Category:X250

2017-05-02T07:46:15Z

Petermolnar: adding "Known linux issues & fixes" section to X250

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=== ThinkPad X250 ===
This page gives an overview of the ThinkPad X250.

==== Standard Features ====
*One of the following ultra-low-voltage [[Broadwell-U]] processors:
** Intel Core i3-5010U, 2,10 GHz, 3MB Cache
** Intel Core i5-5200U, 2,2 - 2,7 GHz, 3MB Cache
** Intel Core i5-5300U, 2,3 - 2,9 GHz, 3MB Cache, Intel vPro
** Intel Core i7-5600U, 2,6 - 3,2 GHz, 4MB Cache, Intel vPro
* One of the following graphics adapters:
** [[Intel HD5500 Graphics]] integrated into CPU
* One of the following displays:
** 12.5" 1366x768 ("HD"), LED-Backlight, 200 cd/m², 300:1
** 12.5" 1366x768 ("HD"), LED-Backlight, 300 cd/m², 700:1, IPS
** 12.5" 1366x768 ("HD"), LED-Backlight, 270 cd/m², IPS, Multitouch
** 12.5" 1920x1080 ("Full HD"), LED-Backlight, 400 cd/m², 700:1, IPS
** 12.5" 1920x1080 ("Full HD"), LED-Backlight, 360 cd/m², IPS, Multitouch
* Up to 8GB DDR3L PC3-12800 1333MHz (1 DIMM Slots) (unofficially 16GB modules reportedly working by multiple users)
* One of the following hard drives:
** SSD, SATA 6.0Gb/s, 2.5" wide, 7mm high
** HDD, SATA 6.0Gb/s, 2.5" wide, 7mm or 9.5mm high (9.5mm is in official spec but not yet confirmed by users)
** SSHD with 8GB NAND flash memory
* M.2 slot with, optionally, one of the following:
** M.2 SSD
** Wireless WWAN, Ericsson N5321, HSPA+ 21Mbps/GSM/GPRS/EDGE, GPS
** Wireless WWAN, Sierra Wireless EM7345,
** Intel 4G LTE/HSPA/GSM/GPRS/EDGE, GPS
* Cellular WWAN
** via optional M.2 card (see above)
** Externally-accessible SIM tray. Stock tray accepts micro-SIM. The socket is also compatible with the mini-SIM (regular size) holder from the X240.
* WLAN (WiFi and BlueTooth):: one of the following, via M.2 slot:
** 802.11b/g/n, ThinkPad 11 b/g/n, 2x2, Wi-Fi + Bluetooth
** 802.11b/g/n, Intel Wireless-N 7265, 2x2, Wi-Fi + Bluetooth
** 802.11a/b/g/n, Intel Dual Band Wireless-N 7265, 2x2, Wi-Fi + BlueTooth
** 802.11ac, Intel Dual Band Wireless-AC 7265, 2x2, Wi-Fi + BlueTooth
* 2 x USB 3.0 ports, one of which is "Always on" for power
* 4-in-1 SD card reader (SD / SDHC / SDXC / MMC slot)
* Smart card reader (optional)
* 720p HD [[Integrated camera]]
* Batteries:
** Internal (front) battery: 23.2Whr 3 cell Li-Polymer (optional)
** External (rear) battery: one of
*** 23.2Wh 3 cell Li-Polymer (Type 68)
*** 72Wh 6 cell Li-Ion (Type 68+)
** External battery can be swapped while running on the internal battery ("Power Bridge")
* [[Integrated Fingerprint Reader]] (optional)
* Dimensions:
** Touch: 305.5mm x 208.5mm x 21.5mm (12.0" x 8.21" x 0.85")
** Non-touch: 305.5mm x 208.5mm x 20.3mm (2.0" x 8.21" x 0.80")
** Weight: 1.42kg (internal battery + 3-cell external battery, non-touch) to 1.65kg (internal battery + 6-cell external battery, touch)
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[[Image:ThinkPadX250.jpg|ThinkPad X250|300px]]
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=== Resources ===
* [https://download.lenovo.com/pccbbs/mobiles_pdf/x250_hmm_en_sp40f30022.pdf X250 Hardware Maintenance Manual]
* [http://thinkwiki.de/X250 ThinkWiki.de article (German)]

=== RAM upgradability ===
This model has a single SODIMM socket, which officially supports up to 8GB of RAM (PC3-12800 DDR3L SDRAM 1600MHz SODIMM).

In practice, some 16GB DRAM modules work in this machine. In particular, the 16GB DDR3L 1333MHz SODIMM DRAM module from Intelligent Memory, model IMM2G64D3LSOD8AG-B15E, is reported to work well by multiple users.

=== Key mapping ===
This model has a 6-row keyboard, where the {{key|F1}} through {{key|F12}} share the same top-row physical keys with special functions keys (volume, brightness, etc.). By default, the top-row keys invoke the special functions, and require {{key|Fn}} keypress to invoke the usual {{key|F1}} through {{key|F12}} functions. To switch the role and have the top-row keys default to {{key|F1}} through {{key|F12}}, enable Fn-Lock mode (by pressing {{key|Fn}}+{{key|Esc}}).

[[Category:X Series]]

=== Known linux issues & fixes ===

==== Complete lockup with nothing in logs on Debian ====

* [https://www.reddit.com/r/thinkpad/comments/5lapud/thinkpad_x250_and_t450s_completely_freezes_on/ Reddit: Thinkpad X250 and T450s completely freezes on Debian]
* [https://artodeto.bazzline.net/archives/924-X11-freezes-and-system-total-hang-up-on-an-Lenovo-X250-i7-5600U-since-kernel-4.6.2-arch-linux.html X11 freezes and system total hang up on an Lenovo X250 i7-5600U since kernel 4.6.2 (arch linux)]

The solution that worked for most:

create a file named `/etc/X11/xorg.conf.d/20-intel.conf`, add the following and reboot:

Section "Device"
Identifier "Intel Graphics"
Driver "intel"
Option "DRI" "false"
Option "AccelMethod" "uxa"
Option "NoAccel" "True"

ThinkWiki - User contributions [en]

Category:X250