Leah Rowe is not a Rowebot
I don't really have the time/motivation to do it myself, but I'm wondering if any HaikuOS fans could test it on Libreboot for me, using the U-Boot payload.
A few boards of Libreboot have U-Boot as a payload option, for x86, and it provides a UEFI implementation, and HaikuOS has a UEFI-based boot method.
Just a passing thought I had while reading about HaikuOS earlier. Any takers?
HaikuOS UEFI guide:
https://www.haiku-os.org/guides/uefi_booting/
and Libreboot's UEFI booting guide is here:
Niels Roetert
@libreleah just Librebooted one of my Dell OptiPlex 3050 micro's with the latest version and U-Boot, then installed Haiku via the guide you mentioned, worked like a charm, let me know if you need me to tell you anything specific, besides that it works.
Leah Rowe is not a Rowebot
@tuxlife did u-boot?
u-rock
thank you
and that joke sounded better in my head. please make a video if you can :)
i want to make a thing of this. a video of it booting.
Leah Rowe is not a Rowebot
@tuxlife i guess the only question is hardware support, especially for network cards and e.g. video processors e.g. intel graphics.
but those questions are probably not affected by what firmware you have, since it pertains to whatever the haikuos kernel is doing.
Niels Roetert
@libreleah my capture card (Blackmagic Intensity Pro 4K) isn’t happy with the Libreboot OptiPlex system output, and doesn’t show anything until the system is completely booted, I’ll try and sort that out, assuming you want a via of the system booting?
Leah Rowe is not a Rowebot
@tuxlife I'll just try it myself later. Thank you for testing. I'm curious, it's been years since i looked at haiku
Niels Roetert
@libreleah it was fun getting to know Haiku a little, had only seen it in Retro Action videos before. Quick question is it possible to somehow configure Libreboot with the U-Boot payload to output a fixed resolution, like 1920x1080px without detecting the actual attached monitor? This might resolve my capture card issues.
Leah Rowe is not a Rowebot
*grep*
$ git grep VIDEO_COREBOOT
config/u-boot/amd64coreboot/config/default:CONFIG_VIDEO_COREBOOT=y
config/u-boot/i386coreboot/config/default:CONFIG_VIDEO_COREBOOT=y
$ git grep VIDEO_COREBOOT
arch/x86/cpu/coreboot/Kconfig: imply VIDEO_COREBOOT
drivers/video/Kconfig:config VIDEO_COREBOOT
drivers/video/Makefile:obj-$(CONFIG_VIDEO_COREBOOT) += coreboot.o
$ find -type f -name "coreboot.c"
./board/coreboot/coreboot/coreboot.c
./arch/x86/cpu/coreboot/coreboot.c
./drivers/video/coreboot.c
Leah Rowe is not a Rowebot
@tuxlife looks like you can probably bodge some stuff in one of those files
Leah Rowe is not a Rowebot
@tuxlife so, in that file drivers/video/coreboot.c you see function save_vesa_mode, which i think is it
it's reading edid to get the timings and such. then later, the actual init is done.
it is in save_vesa_mode() where you want to look
./mk -f u-boot x86_64
do that in lbmk. and then you can open the file under src/u-boot/x86_64
and you can basically just mess with it.
please delete elf/u-boot/ whenever you want to re-build with a change you make. it must be removed manually before rebuild
Niels Roetert
@libreleah thanks for researching I’ll have look later this weekend.
Leah Rowe is not a Rowebot
@tuxlife no "research" tbh, i just grepped some stuff for a few minutes. i'm pretty sure that's the right file. i make no promise (it might be another file).
you'll have to read all of it, and grep for things that call those functions, and adapt it. but the logic is basically this:
1) read edit
2) set video timings based on edid
3) use those timings to bring up the display
it's step 1 and 2 that you need to replace. you'll have to tweak the parameters until something works.
Leah Rowe is not a Rowebot
@tuxlife really though, if you want to do this for education purposes, that's great, but if it's just so you can make a screen recording, don't worry :)
i'm just happy that haiku works.
i might meme it at a conference one day. take a burner laptop with me and run haiku instead of linux/bsd
Leah Rowe is not a Rowebot
@tuxlife oh btw
./mk -b coreboot qemu_x86_64_12mb
qemu-system-x86_64 -m 2G -smp 4 -bios bin/qemu_x86_64_12mb/seauboot_qemu_x86_64_12mb_libgfxinit_corebootfb.rom \
-drive id=disk,file=/home/leah/Downloads/debian-12.8.0-amd64-netinst.iso,if=none \
-device ahci,id=ahci \
-device ide-hd,drive=disk,bus=ahci.0
you can use u-boot in qemu, on libreboot.
you could probably just mess with it there if you want, to try changing video modes. then adapt for real hardware once you're ok.
Leah Rowe is not a Rowebot
@tuxlife probably change that -drive option. i just pasted you the command i use when i'm doing a quick u-boot test in libreboot. i check stuff in qemu first before checking hardware. it speeds up most testing.
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