Thanks for the information. Then maybe just dont stop booting when CPUID is missing. Just add a line to the coreboot log. Something like: "WARNING: Unknown CPU ID detected. Please report to the coreboot mailing lists if the machine is working fine"
Then you still have the same functionality as you told. CPUs that require different handling on different revisions can still be maintained different.
People are also way more motivated to report some unstable working CPUs then when they flash coreboot and the system simply didnt work at all and without reading the logfiles it looks like its completely dead (no screen, nothing, just fans are on).
22. Feb 2017 23:35 by tpearson@raptorengineering.com:
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On 02/22/2017 05:31 PM, > i1w5d7gf38keg@tutanota.com> wrote:
What is the benefit of such a list? I cant see any benefit. Its only additional work that is useless.
Example: Certain CPUs require special cache handling / setup to avoid unusual faults or security vulnerabilities at runtime. The original setup code properly configures model 1 stepping 1 CPUs, but stepping 2 CPUs require special setup. User installs coreboot and uses it with a stepping 2 CPU without adding in the new setup code -- it seems to run, but crashes every once in a while. User (possibly) figures out coreboot is the problem and is very unhappy.
Again, this is very low level stuff; mistakes do not always show up as "failure to boot". If you want to verify your CPUs and add them to the list please do so!
Timothy Pearson Raptor Engineering +1 (415) 727-8645 (direct line) +1 (512) 690-0200 (switchboard) https://www.raptorengineering.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Mozilla - > http://enigmail.mozdev.org
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-- coreboot mailing list: > coreboot@coreboot.org https://www.coreboot.org/mailman/listinfo/coreboot
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On 02/22/2017 05:49 PM, i1w5d7gf38keg@tutanota.com wrote:
Thanks for the information. Then maybe just dont stop booting when CPUID is missing. Just add a line to the coreboot log. Something like: "WARNING: Unknown CPU ID detected. Please report to the coreboot mailing lists if the machine is working fine"
Then you still have the same functionality as you told. CPUs that require different handling on different revisions can still be maintained different.
People are also way more motivated to report some unstable working CPUs then when they flash coreboot and the system simply didnt work at all and without reading the logfiles it looks like its completely dead (no screen, nothing, just fans are on).
And with that, I'll turn this over for the other members on the list to comment on this suggestion. I don't care strongly one way or another, provided the warning is at ALERT status so it shows up even with logging mostly disabled.
- -- Timothy Pearson Raptor Engineering +1 (415) 727-8645 (direct line) +1 (512) 690-0200 (switchboard) https://www.raptorengineering.com
It would be really great if you could test out a Core i7-3840QM in the G2 socket of the Thinkpad T520. Its the best ivy bridge with 45W TDP and the Core i7-3840QM officialy support 32GB of RAM.
The Lenovo OEM Bios wont support ivy bridge. Coreboot didnt have such limitations ;)
Thanks!
21. Feb 2017 22:08 by coreboot@tricnet.de:
Hi Arthur,Zitat von Arthur Heymans <> arthur at aheymans.xyz> >:>> Thomas Richter <> coreboot at tricnet.de> > writes:> >>> Is Sandy Bridge E so different from Sandy Bridge? Would it be possible> >> >> Sandy Bridge E are high end desktop/server CPUs that have a different> >> socket (lga2011) and likely a different memory controller (4 channels> >> instead of 2).> >> A quick look at datasheet says nothing about maximum rank size.> I see.>>> to replace the 2620QM with an Ivy Bridge CPU?> >> >> Afaik that should be possible since the CPU is socketed on that model> >> but won't overcome your issue. (same limitation)> Thank your for your time to explain. Seems like I have to look for a new laptop then ;-).It was a fun project, I learned a lot and I'm really impressed by the usability. Will definitely keep coreboot on the t520!Best,Thomas
Ivy Bridge doesn't support 16GB DIMMs either. I've opened a ticket before. https://ticket.coreboot.org/issues/56
On Thu, Feb 23, 2017 at 8:33 AM, i1w5d7gf38keg@tutanota.com wrote:
It would be really great if you could test out a Core i7-3840QM in the G2 socket of the Thinkpad T520. Its the best ivy bridge with 45W TDP and the Core i7-3840QM officialy support 32GB of RAM.
The Lenovo OEM Bios wont support ivy bridge. Coreboot didnt have such limitations ;)
Thanks!
- Feb 2017 22:08 by coreboot@tricnet.de
<coreboot%40coreboot.org?Subject=Re%3A%20%5Bcoreboot%5D%20T520%202630QM%2016GB%20DIMM&In-Reply-To=%3C20170221220843.Horde.m-fqE6Q5TCVYrKxblt5yYGA%40ns2.tricnet.de%3E> :
Hi Arthur,
Zitat von Arthur Heymans <arthur at aheymans.xyz https://www.coreboot.org/mailman/listinfo/coreboot>:
- Thomas Richter <coreboot at tricnet.de https://www.coreboot.org/mailman/listinfo/coreboot> writes:
*>>* Is Sandy Bridge E so different from Sandy Bridge? Would it be possible *>>* Sandy Bridge E are high end desktop/server CPUs that have a different *>* socket (lga2011) and likely a different memory controller (4 channels *>* instead of 2). *>* A quick look at datasheet says nothing about maximum rank size.
I see.
- to replace the 2620QM with an Ivy Bridge CPU?
*>>* Afaik that should be possible since the CPU is socketed on that model *>* but won't overcome your issue. (same limitation)
Thank your for your time to explain. Seems like I have to look for a new laptop then ;-).
It was a fun project, I learned a lot and I'm really impressed by the usability. Will definitely keep coreboot on the t520!
Best,
Thomas
-- coreboot mailing list: coreboot@coreboot.org https://www.coreboot.org/mailman/listinfo/coreboot
On 23.02.2017 01:33, i1w5d7gf38keg@tutanota.com wrote:
It would be really great if you could test out a Core i7-3840QM in the G2 socket of the Thinkpad T520. Its the best ivy bridge with 45W TDP and the Core i7-3840QM officialy support 32GB of RAM.
Only with 8 ranks of 4GiB. That would be 4 8GiB SO-DIMMs, good luck squeezing them into a T520.
Nico
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i1w5d7gf38keg＠tutanota.com -
Iru Cai -
Nico Huber -
Timothy Pearson