March 2021 - coreboot - mail.coreboot.org

what are requirements for coreboot IOMMU support?
by ludphaeus March 3, 2021

March 3, 2021

Hi I am trying to port a Haswell laptop and I would want it to have IOMMU support. My chipset supports VT-d but CPU does not. The official info from Intel says the PC needs chipset, CPU and BIOS to support VT-d to use IOMMU. I think this is not true because I saw some boards in board status have working IOMMU with no VT-d support in chipset but with coreboot advertising DMAR table to OS and CPU with VT-d support. Sapphire H61 is a example of this. But other H61 coreboot boards such as P8H61-M LX that have CPU without VT-d advertise no IOMMU capability. So what is really required for full IOMMU ? Do I have chance for full, working IOMMU on this laptop? Thanks, Lud

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Display Port Monitor turns off during Ubuntu OS boot
by Rao G March 3, 2021

March 3, 2021

Hi Coreboot Team, There is an external Monitor which works on HDMI/DVI and also DP , In BIOS the display is good whereas in OS (Ubuntu 18.04) until the kernel is initialized and i915 Video driver is loaded display is perfect, looks like the i915 OS driver switches off the monitor and there is no signal Does ACPI GFX method have to return any External display specific data to the OS driver ? Tried to make changes to VBIOS but did not help, thought ASL code is missing under GFX0 From the OS following data can be read 1. External Monitor's EDID data can be read from I2C Bus 2. Even VBT data from ACPI NVS can be read Tried to dig into some of these files https://github.com/torvalds/linux/tree/master/drivers/gpu/drm/i915/display intel_dp.c, intel_acpi.c to understand what function is turning off DP link when i have the OS debug driver logs, can send it across Any clues will help, appreciate your time PS:The platform has Intel BayTrail SoC, ValleyView chipset and VBIOS. The bios do not use GOP driver which replaces VBIOS Thanks Rao

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Re: [flashrom] error bios
by Mike Banon March 2, 2021

March 2, 2021

Glad to help you. For your future replies, make sure that you're reposting to the mailing list as well. On Tue, Mar 2, 2021 at 9:39 PM edvaldo silva <edvaldo.silva(a)zohomail.com> wrote: > > I performed all the tests I was using another version of linux I switched to linux manjaro and apparently it worked out I changed the recording mode. before I was using: > sudo apt flashrom -p ch341a_spi -w (bios name) .bin, in manjaro I'm using it like this and it's working: sudo --programmer ch341a_spi -w (bios name) .bin and now it's recording normal. > > thanks > > > Att, > > Edvaldo Silva > edvaldo.set(a)zohomail.com > +55 12 9 8209 6114 > > > > > ---- Ativado Ter, 02 mar 2021 13:24:31 -0300 Mike Banon <mikebdp2(a)gmail.com> escreveu ---- > > Well, it looks like your flashing has failed. Why? Maybe your flashing > setup wasn't reliable enough: long wires etc. Until we'll learn more > of it, we can't help you > > On Fri, Feb 26, 2021 at 10:55 PM edvaldo silva via flashrom > <flashrom(a)flashrom.org> wrote: > > > > Found GigaDevice flash chip "GD25Q64(B)" (8192 kB, SPI) on ch341a_spi. > > Reading old flash chip contents... done. > > Erasing and writing flash chip... Erase/write done. > > Verifying flash... FAILED at 0x00004500! Expected=0x45, Found=0xff, failed byte count from 0x00000000-0x007fffff: 0x156b2 > > Your flash chip is in an unknown state. > > > > Att, > > > > Edvaldo Silva > > edvaldo.silva(a)zohomail.com > > +55 12 9 8209 6114 > > > > > > > > _______________________________________________ > > flashrom mailing list -- flashrom(a)flashrom.org > > To unsubscribe send an email to flashrom-leave(a)flashrom.org > > > > -- > Best regards, Mike Banon > Open Source Community Manager of 3mdeb - https://3mdeb.com/ > > > -- Best regards, Mike Banon Open Source Community Manager of 3mdeb - https://3mdeb.com/

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Lenovo T410: Regression in coreboot 4.13?
by Daniel Kulesz March 2, 2021

March 2, 2021

Hi folks, I spent a long time trying to get coreboot 4.13 to work on a Lenovo T410, trying various configuration options etc. but it never worked (fan, keyboard LED and thinklight went on, screen stayed dark). I tried even the most basic config, but no luck. I tried the same with coreboot 4.12 and this seems to work fine. Unfortunately, this is not my laptop and the owner needs his laptop back asap, so I don't have the time to further debug this issue. Yet, I wanted to report this regression as I I am wondering if anyone else is running 4.13 on a T410 with success? Cheers, Daniel

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Question regarding reflashing/updating
by Louis March 2, 2021

March 2, 2021

Hello, Just wanted to say thank you for creating this firmware it is a great project and I hope I can contribute to it one day. I have an x230 preinstalled with Coreboot skulls, am I able to re-flash Coreboot skulls internally just through the OS or is there a way to verify that the firmware installed on the system hasn't been modified in any way, thank you. Kindest regards, Louis

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Coreboot with VIA-Processors available?
by Burkhanov, Sherzod March 1, 2021

March 1, 2021

Dear Martin and coreboot, I would like to ask is it possible to use coreboot also with VIA-Processors? And how is to install coreboot onto motherboard EPIA M920? Maybe is there video tutorials for that? Is it also possible to use coreboot on MacBooks? Thanks! Sherzod Burkhanov Dolmetscher Farsi/Dari/Russisch Willkommen-in-Arbeit-Büro Lichtenberg Alfredstraße 4, 10365 Berlin Tel.: 0162 4098908 DQG mbH Rungestraße 19, 10179 Berlin Tel.: 030 586 199 722 Fax: +49(0)30-278733-36 Geschäftsführer: Gunter Holley HRB 91996 AG Charlottenburg USt.-IdNr.: DE 232803244 s.burkhanov(a)dqg-berlin.de www.wia-lichtenberg.de www.dqg-berlin.de Unsere Hinweise zum Datenschutz finden Sie hier.<https://www.dqg-berlin.de/datenschutz/> [https://infomancie.files.wordpress.com/2008/06/dont_print_emails.jpg?w=200] Be nice to the world. Please think before you print! [cid:f0f08e5b-78bb-4deb-9529-b32ef1801bea]

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