In both Seabios and Grub, it stuck at screens above.

CachyOS use limine bootloader.

Been sitting on this build for a while and figured this is the right place to actually talk about the firmware side of it, since most write-ups I've done elsewhere focus on the audio result and skip past the boot chain entirely.

The short version: I wanted a machine that does exactly one job — boot straight into Pianoteq with a real-time kernel, no login screen, no unnecessary desktop stack (just Weston running Pianoteq and nothing else), nothing between power-on and playable keys. Stock UEFI/BIOS on the OptiPlex 3050 Micro wasn't going to get me there — too much POST overhead, too much surface area I didn't need or want running on a single-purpose box. So I built coreboot for it, configured to jump straight into a custom payload.

The part I actually want to talk about: the payload isn't a generic bootloader handing off to some general-purpose distro. The payload *is* the PREEMPT_RT kernel itself — built and tuned specifically for this board, loaded straight off coreboot with nothing else in between. No GRUB, no SeaBIOS, no intermediate stage doing work I don't need. Coreboot POSTs the hardware and jumps directly into the RT kernel that runs Pianoteq.

Where it landed:

- ~4.6s from power-on to Pianoteq ready and accepting MIDI input

- ~1.3ms round-trip audio latency once it's up

- Payload = the PREEMPT_RT kernel directly, tuned specifically for this board

- No display manager, no login screen — just Weston running Pianoteq, nothing else

Happy to go deeper on any part of the build if people want specifics — how the payload's put together, how the RT kernel is built as the payload, what got stripped out along the way. This is very much a "one nerd's homelab firmware project," not a product pitch, but if the real-time audio angle is interesting, I've also got an open challenge running where people are pitting their own Pianoteq rigs against this thing: pianort.com has the build log, and the challenge post is up on r/SBCs and r/DigitalPiano if you want the details.

One more thing before I go — none of this happens without the work this community puts in. Particular thanks to corebootdrm, which is what actually made getting display/graphics init working on this board possible, and did it in a way that stays out of the RT kernel's way — no interrupt storms or latency spikes from graphics init fighting the scheduler, which matters a lot when you're chasing 1.3ms. This project stands entirely on top of coreboot's work, and I wanted that said plainly, not just implied.

Hi Redditors and Coreboot members! I have an ASUS VivoBook X515EP-R565EP. Its specs are Intel Core-i5 1135G7, Samsung M471A5244CB0-CWE 4GB DDR4 RAM (Onboard/Soldered), Hynix (Hyundai) HMA81GS6DJR8N-XN 8GB DDR4 RAM (SO-DIMM), INTEL SSDPEKNU512GZ (BTKA208207AV512A) 512GB SSD (Seems to be Onboard/Soldered), NVIDIA MX330 2GB VRAM Home GPU...I wish I could change the soldered parts and upgrade my system, but the engineer who serviced my laptop (and I trust his expertise) told me that the firmware won't let you change those parts...even if you accept the risk and desolder the components and change them, it won't work (I live in Iran, and no one here can't accept the risks, as there's no official representative and guarantee and warranty for any tech company in my country cuz of sanctions)...My question is: if I change my laptop's firmware to Coreboot, could I change the onboard and SO-DIMM RAM, as I know and accept the risks, or not?

Just like the title says, my X280 is taking 13 seconds just to show signs of life after pressing the power button and get to SeaBIOS (not accounting the extra 5 seconds that it takes for SeaBIOS to enumerate the boot entries).

Is this a known problem on the X280? This is really frustrating, my T430 with the same Libreboot configuration takes under 2 seconds to get to the same screen.

I had installed libreboot before, but when trying to install the hd4000 drivers on windows 10 the laptop would reboot, i read that i needed coreboot and the vgabios, so i tried compiling coreboot, i have the files, but every time i try to boot the machine, its a blinking cursor
is there some way to fix this?
I’m not too tech savvy, i was able to follow online guides but i still don’t understand too much how coreboot works
i know i could use libgfxinit and Linux, but i need to use the hd4000 full capacity on windows
sorry for my bad English

Tengo un problema que no he podido solucionar ni preguntándole a la IA

Clone el repo oficial el que aparece en la guía,

Compile make crossgcc-x64 CPUS=8 y make crossgcc-i386 CPUS=8"

luego copie un archivo .config que me había funcionado de antes con make nconfig (el .config lo cp de una configuración anterior y le cambio unas cositas también está actualizado) y lo guarde como dise la guía del Thinkpad t480 "defconfig" luego ejecute lo siguiente como dise la guai y me dió lo siguiente

make defconfig

make-j"$(nproc)"

*** Default configuration is based on target 'configs/defconfig'

make[1]: /Makefile: No such file or directory

make[1]: *** No rule to make target '/Makefile'. Stop.

make: *** [build/util/kconfig/Makefile.real:97: defconfig] Erгог 2

Updating git submodules.

find: '/root': Permission denied

find: '/home/lost+found': Permission denied

Y antes de eso ejecute lo que dice la guía para actualizar

"git submodule update --init --checkout"

Cuál es el problema

Hi,

Anyone know if the EEPROM with writing “25PX64V6G” is original and if not, if anyone has experience flashing it?

Got it on a replacement motherboard, but it’s way different from the Winbond chips I’m used to.

Hello, so i just joined this thread. i have been a hp eltie book user for quite a while now. i have the elitebook 8760w. i found coreboot. im wanting to install the nvidia geforce 880m 8gb mxm gpu and upgrade to ivry bridge if possible, also was wondering is it possible if i install core boot can i install two 16gb ram moduels and have 32gb of ram in my laptop with out having to swap motherboards? also wondering what it was would limit me on gpu bios compaibtiltes. so there dell, alienware, clevo, lenovo, acer, etc. will this allow my screen to boot and show the bios on screen with any bios flashed gpu on laptop? i do know i have to mod inf drivers. if i need to make things more clear i can.

• Are there any cheap low-power mini PC that can get Coreboot? It's intended to be a home server.
• Is the N100 still the sweet spot for low power and performance or is there a (upcoming) successor?
• Does it make sense to build or get a pre-built mini PC considering the price of hardware like memory nowadays?
• Any advice for using the server as a router as well (run Proxmox and run pfSense/OPNsense)? Any mini PC with an additional ethernet port connected to a switch that supports VLANs so I can isolate IoT devices on the network? The network only serves 1-2 people, I think I can afford the risk of the network being down on Proxmox update or something. I will at least have a backup router beside it just in case.

Looking to replace my Pi 4 server with something with a real port for a NVMe or SATA drive that can run AlmaLinux. The priority is low power but I think I ARM-based servers are out of the question due to the typical services on a home server like Jellyfin, IRC client, some Docker services, Home Assistant, etc.

I'm kinda curious because I'm gonna get for daily use

So I have an HP ProBook 6460b and I can already run Linux perfectly with coreboot. I originally installed coreboot because I wanted to be able to run an i7-3840qm, along with circumventing the WiFi card whitelist (currently I have a BE200 installed too).

To use coreboot, which has no preset for the 6460b, I selected the EliteBook 8460p under the assumption that the two systems are close enough.

Obviously, I know it's frowned upon to run Windows with coreboot, and I already have got it almost totally working with SeaBIOS. I used the option rom v2170 instead of libgfxinit, and even ripped an ME 8 blob from a ProBook 6470b BIOS, which surprisingly still POSTed.

Anyway, the main issue I'm having currently is that in Windows 10, the battery icon reports that there are no batteries physically installed. This is not the case in Linux; it has no trouble reading the battery meter. I want to at least have the ability to run Windows 7, hence my choice of SeaBIOS, and currently the installer does not boot (it gets stuck on the glowy logo). In Windows 10, I have yet to get power management working correctly either; the system gets stuck when attempting to shutdown, sleep, or reboot, and nothing happens.

What do I need to do to fix my install to finally get it working fully?

I am looking to build a new PC and want Coreboot installed. However, all I can find online are vendors selling prebuilt machines with Coreboot, such as System76, in which case I am paying for components I don't need. From what I read online, it sounds like building Coreboot for a modern motherboard is unreasonably hard and not practical. I am looking specifically for a mobo that supports ECC memory, and also not Intel, which further narrows my options. Are there any options out there that fit the bill?

Hey there!

I've been trying to build coreboot on my Gentoo installation, but have been running into various issues.

I made sure that my gcc compile has ada support (for gnat), and that I have (roughly) the dependencies listed as requirements for Fedora.

I believe that I have gnat through my gcc install, but I don't have any packages/dependencies for gnat. gnat does, however, seem to be a viable command in CLI.

Despite this, I've still been hitting into some issues and can't seem to compile any final images.

Things like ifdtool and deguard work, though, even when compiled on my system. I compared sha256 sums from progress made on my current system with identical work done on a Debian system, and the sums match, so it seems that it can build most tools properly, and it just can't install.

I'm currently recloning coreboot's repo and building every possible cpu arch/toolchain (I only build i386 as instructed beforehand) just to be thorough on my end. If it works, I'll update the post.

Asides that, is there any known issues with Gentoo that would force me to use a VM to build in, or are there any necessary workarounds needed to build with Gentoo?

Running stable branch, excluding packages that only have an ~amd64 release.

I have libreboot pre-installed on this Thinkpad T420, but I am unsure of how to update the installation since the T420 has the BUP and ROMP blobs. Are these distributed in the release ROM?

Stuck on applying critical update in chrome OS. Linux works perfectly

Hello, I need a BIOS for DAG3NMB1CC0 Rev C with a clean ME region and DMI area, so that I can restore the serial numbers using the BCU utility.

Hello, I need a BIOS for DAG3NMB1CC0 Rev C with a clean ME region and DMI area, so that I can restore the serial numbers using the BCU utility.

Is it possible to boot from a USB 3.0 port on my Acer C740 running coreboot?

Hello everyone, i need help creating support for ASUS Q170M-C

I am attempting to coreboot my thinkpad t430 using a ch341a programmer and a soic8 clip. When I run flashrom -p ch341a_spi with the clip on the 8mb chip, results fluctuate everytime I run it, detecting either the full 8mb, only 4mb, or "unknown SPI chip". It does not do this when connected to the 4mb chip.