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| author | Leah Rowe <info@minifree.org> | 2016-08-22 10:22:04 +0100 |
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| committer | Leah Rowe <info@minifree.org> | 2016-08-22 10:22:04 +0100 |
| commit | c679b19f0b0d95f587b3836c7bf867a932d3df28 (patch) | |
| tree | a0529135e5901b3aff16987a2cf94c10752cb8ab /docs/hcl/x200.html | |
| parent | 3ca295f25340344f5d42164bd134dbb9f5b0ff4c (diff) | |
| download | librebootfr-c679b19f0b0d95f587b3836c7bf867a932d3df28.tar.gz librebootfr-c679b19f0b0d95f587b3836c7bf867a932d3df28.zip | |
actually add the documentation directory. (I forgot git add in last commit)
Diffstat (limited to 'docs/hcl/x200.html')
| -rw-r--r-- | docs/hcl/x200.html | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/docs/hcl/x200.html b/docs/hcl/x200.html new file mode 100644 index 00000000..51484889 --- /dev/null +++ b/docs/hcl/x200.html @@ -0,0 +1,391 @@ +<!DOCTYPE html> +<html> +<head> + <meta charset="utf-8"> + <meta name="viewport" content="width=device-width, initial-scale=1"> + + <style type="text/css"> + @import url('../css/main.css'); + </style> + + <title>ThinkPad X200</title> +</head> + +<body> + + <div class="section"> + <h1 id="pagetop">ThinkPad X200</h1> + + <p> + It is believed that all X200 laptops are compatible. X200S and X200 Tablet will + also work, <a href="#x200s">depending on the configuration</a>. + </p> + <p> + It *might* be possible to put an X200 motherboard in an X201 chassis, though this is currently untested + by the libreboot project. The same may also apply between X200S and X201S; again, this is untested. + <b>It's most likely true.</b> + </p> + + <p> + There are two possible flash chip sizes for the X200: 4MiB (32Mbit) or 8MiB (64Mbit). + This can be identified by the type of flash chip below the palmrest: 4MiB is SOIC-8, 8MiB + is SOIC-16. + </p> + + <p> + <b>The X200 laptops come with the ME (and sometimes AMT in addition) before flashing libreboot. Libreboot disables and removes it + by using a modified descriptor: see <a href="gm45_remove_me.html">gm45_remove_me.html</a></b> (contains notes, plus + instructions) + </p> + + <p> + Flashing instructions can be found at <a href="../install/index.html#flashrom">../install/index.html#flashrom</a> + </p> + + <p> + <a href="index.html">Back to previous index</a>. + </p> + </div> + + <div class="section"> + + <h2 id="compatibility_noblobs">Compatibility (without blobs)</h2> + + <div class="subsection"> + <h3 id="hwvirt">Hardware virtualization (vt-x)</h3> + <p> + The X200, when run without CPU microcode updates in coreboot, currently kernel panics + if running QEMU with vt-x enabled on 2 cores for the guest. With a single core enabled + for the guest, the guest panics (but the host is fine). Working around this in QEMU + might be possible; if not, software virtualization should work fine (it's just slower). + </p> + <p> + On GM45 hardware (with libreboot), make sure that the <i>kvm</i> and <i>kvm_intel</i> kernel modules + are not loaded, when using QEMU. + </p> + <p> + The following errata datasheet from Intel might help with investigation: + <a href="http://download.intel.com/design/mobile/specupdt/320121.pdf">http://download.intel.com/design/mobile/specupdt/320121.pdf</a> + </p> + <p> + Anecdotal reports from at least 1 user suggests that some models with CPU microcode 1067a (on the CPU itself) might work with vt-x in libreboot. + </p> + </div> + + </div> + + <div class="section"> + + <h2 id="x200s">X200S and X200 Tablet.</h2> + + <p> + X200S and X200 Tablet have raminit issues at the time of writing + (GS45 chipset. X200 uses GM45). + </p> + + <p> + X200S and X200 Tablet are known to work, but only with certain CPU+RAM configurations. + The current stumbling block is RCOMP and SFF, mentioned in + <a href="https://www.cs.cmu.edu/~410/doc/minimal_boot.pdf">https://www.cs.cmu.edu/~410/doc/minimal_boot.pdf</a>. + </p> + <p> + The issues mostly relate to raminit (memory initialization). With an + unpatched coreboot, you get the following: <a href="text/x200s/cblog00.txt">text/x200s/cblog00.txt</a>. + No SODIMM combination that was tested would work. At first glance, it looks + like GS45 (chipset that X200S uses. X200 uses GM45) is unsupported, but + there is a workaround that can be used to make certain models of the X200S + work, depending on the RAM. + </p> + <p> + The datasheet for GS45 describes two modes: low-performance and + high-performance. Low performance uses the SU range of ultra-low + voltage procesors (SU9400, for example), and high-performance uses the + SL range of processors (SL9400, for example). According to datasheets, + GS45 behaves very similarly to GM45 when operating in high-performance + mode. + </p> + <p> + The theory then was that you could simply remove + the checks in coreboot and make it pass GS45 off as GM45; the idea is + that, with a high-performance mode CPU (SL9400, for example) it would + just boot up and work. + </p> + <p> + This suspicion was confirmed with the following log: + <a href="text/x200s/cblog01.txt">text/x200s/cblog01.txt</a>. + The memory modules in this case are 2x4GB. <s><b>However, not all + configurations work: <a href="text/x200s/cblog02.txt">text/x200s/cblog02.txt</a> (2x2GB) + and <a href="text/x200s/cblog03.txt">text/x200s/cblog03.txt</a> (1x2GB) + show a failed bootup.</b></s> <i>False alarm. The modules were mixed (non-matching). X200S + with high-performance mode CPU will work so long as you use matching memory modules + (doesn't matter what size).</i> + </p> + <p> + This was then pushed as a patch for coreboot, which can be found at + <a href="http://review.coreboot.org/#/c/7786/">http://review.coreboot.org/#/c/7786/</a> + (libreboot merges this patch in coreboot-libre now. Check the 'getcb' script in + src or git). + </p> + + <div class="subsection"> + <h3 id="x200s_raminit">Proper GS45 raminit</h3> + <p> + A new northbridge gs45 should be added to coreboot, based on gm45, + and a new port x200st (X200S and X200T) should be added based on + the x200 port. + </p> + <p> + This port would have proper raminit. Alternatively, gs45 (if + raminit is taken to be the only issue with it) can be part of + gm45 northbridge support (and X200S/Tablet being part of the X200 + port) with conditional checks in the raminit that make raminit + work differently (as required) for GS45. nico_h and pgeorgi/patrickg + in the coreboot IRC channel should know more about raminit on gm45 + and likely gs45. + </p> + <p> + pgeorgi recommends to run SerialICE on the factory BIOS (for X200S), + comparing it with X200 (factory BIOS) and X200 (gm45 raminit code + in coreboot), to see what the differences are. Then tweak raminit + code based on that. + </p> + </div> + + </div> + + <div class="section"> + + <h2>Trouble undocking (button doesn't work)</h2> + + <p> + This person seems to have a workaround: + <a href="https://github.com/the-unconventional/libreboot-undock">https://github.com/the-unconventional/libreboot-undock</a> + </p> + + </div> + + <div class="section"> + + <h2 id="lcd_supported_list">LCD compatibility list</h2> + + <p> + LCD panel list (X200 panels listed there): + <a href="http://www.thinkwiki.org/wiki/TFT_display">http://www.thinkwiki.org/wiki/TFT_display</a> + </p> + + <p> + All LCD panels for the X200, X200S and X200 Tablet are known to work. + </p> + + <p> + <a href="#pagetop">Back to top of page.</a> + </p> + + <div class="subsection"> + <h3 id="ips"> + AFFS/IPS panels + </h3> + <h4>X200</h4> + <p> + Adapted from <a href="https://github.com/bibanon/Coreboot-ThinkPads/wiki/ThinkPad-X200">https://github.com/bibanon/Coreboot-ThinkPads/wiki/ThinkPad-X200</a> + </p> + <p> + Look at wikipedia for difference between TN and IPS panels. IPS have much better colour/contrast than + a regular TN, and will typically have good viewing angles. + </p> + <p> + These seem to be from the X200 tablet. You need to find one without the glass touchscreen protection on it + (might be able to remove it, though). It also must not have a digitizer on it (again, might be possible to + just simply remove the digitizer). + </p> + <ul> + <li>BOE-Hydis HV121WX4-120, HV121WX4-110 or HV121WX4-100 - cheap-ish, might be hard to find</li> + <li>Samsung LTN121AP02-001 - common to find, cheap</li> + </ul> + <p> + <b>If your X200 has an LED backlit panel in it, then you also need to get an inverter and harness cable + that is compatible with the CCFL panels. To see which panel type you have, see + <a href="#led_howtotell">#led_howtotell</a>. If you need the inverter/cable, here are part numbers: + 44C9909 for CCFL LVDS cable with bluetooth and camera connections, and 42W8009 or 42W8010 for the + inverter.</b> + </p> + <p> + There are glossy and matte versions of these. Matte means anti-glare, which is what you want (in this authors opinion). + </p> + <p> + Refer to the HMM (hardware maintenance manual) for how to replace the screen. + </p> + <p>Sources:</p> + <ul> + <li><a href="http://forum.thinkpads.com/viewtopic.php?f=2&t=84941">ThinkPad Forums - Matte AFFS Panel on X200</a></li> + <li><a href="http://forum.thinkpads.com/viewtopic.php?p=660662#p660662">ThinkPad Forums - Parts for X200 AFFS Mod</a></li> + <li><a href="http://thinkwiki.de/X200_Displayumbau">ThinkWiki.de - X200 Displayumbau</a> (achtung: du musst lesen und/oder spreche deutsch; + oder ein freund fur hilfe)</li> + </ul> + </div> + <div class="subsection"> + <h3>X200S</h3> + <p> + <a href="http://forum.thinkpads.com/viewtopic.php?p=618928#p618928">http://forum.thinkpads.com/viewtopic.php?p=618928#p618928</a> + explains that the X200S screens/assemblies are thinner. You need to replace the whole lid with one from a normal X200/X201. + </p> + </div> + + <p> + <a href="#pagetop">Back to top of page.</a> + </p> + + </div> + + <div class="section"> + <h2 id="led_howtotell">How to tell if it has an LED or CCFL?</h2> + + <p> + Some X200s have a CCFL backlight and some have an LED backlight, in their LCD panel. This + also means that the inverters will vary, so you must be careful if ever replacing either + the panel and/or inverter. (a CCFL inverter is high-voltage and will destroy an LED backlit panel). + </p> + <p> + CCFLs contain mercury. An X200 with a CCFL backlight will (<b></b>unless it has been changed to an LED, + with the correct inverter. Check with your supplier!</b>) the following: <i>"This product + contains Lithium Ion Battery, Lithium Battery and a lamp which contains mercury; dispose according to + local, state or federal laws"</i> (one with an LED backlit panel will say something different). + </p> + <p> + <a href="#pagetop">Back to top of page.</a> + </p> + </div> + + <div class="section"> + + <h2 id="regdumps">Hardware register dumps</h2> + + <p> + The coreboot wiki <a href="http://www.coreboot.org/Motherboard_Porting_Guide">shows</a> + how to collect various logs useful in porting to new + boards. Following are outputs from the X200: + </p> + + <ul> + <li> + BIOS 3.15, EC 1.06 + <ul> + <li><a href="hwdumps/x200/">hwdumps/x200/</a></li> + </ul> + </li> + </ul> + + </div> + + <div class="section"> + + <h1 id="ram_s3_microcode">RAM, S3 and microcode updates</h1> + + <p> + Not all memory modules work. Most of the default ones do, but you have to be careful + when upgrading to 8GiB; some modules work, some don't. + </p> + + <p> + <a href="http://www.forum.thinkpads.com/viewtopic.php?p=760721">This page</a> might be useful for RAM compatibility info + (note: coreboot raminit is different, so this page might be BS) + </p> + + <p> + pehjota started collecting some steppings for different CPUs on several X200 laptops. + You can get the CPUID by running: <br/> + $ <b>dmesg | sed -n 's/^.* microcode: CPU0 sig=0x\([^,]*\),.*$/\1/p'</b> + </p> + + <p> + What pehjota wrote: + The laptops that have issues resuming from suspend, as well as a laptop that (as I mentioned earlier in #libreboot) won't boot with any Samsung DIMMs, all have CPUID 0x10676 (stepping M0). + </p> + + <p> + What pehjota wrote: + Laptops with CPUID 0x167A (stepping R0) resume properly every time and work with Samsung DIMMs. I'll + need to do more testing on more units to better confirm these trends, but it looks like the M0 microcode + is very buggy. That would also explain why I didn't have issues with Samsung DIMMs with the Lenovo BIOS + (which would have microcode updates). I wonder if VT-x works on R0. + </p> + + <p> + What pehjota wrote: + As I said, 10676 is M0 and 1067A is R0; those are the two CPUIDs and steppings for Intel Core 2 Duo P8xxx CPUs with factory microcode. (1067 is the family and model, and 6 or A is the stepping ID.) + </p> + + <p> + <b> + TODO: check the CPUIDs and test S3 resume and/or KVM on any C2D systems (including non-P8xxx ones, which I don't have here) you have available. I'd be curious if you could confirm these results. + </b> + It might not be coreboot that's buggy with raminit/S3; it might just be down to the microcode updates. + </p> + + </div> + + <div class="section"> + + <h2 id="unsorted">Unsorted notes</h2> + +<pre> +<sgsit> do you know if it's possible to flash thinkpads over the LPC debug connector at the front edge? +<sgsit> that would make life much easier for systems like this +<sgsit> all the Wistron manufactured systems have this thing called a "golden finger", normally at the front edge of the board +<sgsit> you can plug a board in which gives diagnostic codes but i'm wondering whether it is capable of more +<sgsit> <a href="http://www.endeer.cz/bios.tools/bios.html">http://www.endeer.cz/bios.tools/bios.html</a> +</pre> + + </div> + + <div class="section"> + + <p> + Copyright © 2014, 2015 Leah Rowe <info@minifree.org><br/> + Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net><br/> + Permission is granted to copy, distribute and/or modify this document + under the terms of the GNU Free Documentation License, Version 1.3 + or any later version published by the Free Software Foundation; + with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. + A copy of the license can be found at <a href="../gfdl-1.3.txt">../gfdl-1.3.txt</a> + </p> + + <p> + Updated versions of the license (when available) can be found at + <a href="https://www.gnu.org/licenses/licenses.html">https://www.gnu.org/licenses/licenses.html</a> + </p> + + <p> + UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE + EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS + AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF + ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS, + IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION, + WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR + PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS, + ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT + KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT + ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU. + </p> + <p> + TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE + TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION, + NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT, + INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES, + COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR + USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN + ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR + DAMAGES. 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