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diff --git a/docs/hardware/x200.md b/docs/hardware/x200.md index 99f9ff21..b0ff096a 100644 --- a/docs/hardware/x200.md +++ b/docs/hardware/x200.md @@ -219,57 +219,6 @@ outputs from the X200: - BIOS 3.15, EC 1.06 - [hwdumps/x200/](hwdumps/x200/) -RAM, S3 and microcode updates {#ram_s3_microcode} -============================= - -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. - -Someone on reddit also did their own research on RAM compatibility: [on -this -post](https://www.reddit.com/r/libreboot/comments/5ax17e/liberated_x200_is_really_picky_with_memory/) - -[This page](http://www.forum.thinkpads.com/viewtopic.php?p=760721) might -be useful for RAM compatibility info (note: coreboot raminit is -different, so this page might be BS) - -pehjota started collecting some steppings for different CPUs on several -X200 laptops. You can get the CPUID by running: - - # dmesg | sed -n 's/.*microcode:.*sig=\([^,]*\),.*$/\1/p' | uniq - -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). - -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. - -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.) - -*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.* - -It might not be coreboot that's buggy with raminit/S3; it might just be down to -the microcode updates. - -Unsorted notes {#unsorted} --------------- - - <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> http://www.endeer.cz/bios.tools/bios.html - Copyright © 2014, 2015 Leah Rowe <info@minifree.org>\ Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net>\ |