Re: Video Error Reasons?

Philipp Eppelt <[email protected]> Wed, 27 Nov 2024 09:41:34 +0100

Newsgroups	gmane.comp.micro-kernel.l4.devel
Message-ID	<[email protected]>

Hi Lonnie, Martin,

to mimic the UEFI system in qemu you can do the following:

- find OVMF_CODE.fd, in my case: /usr/share/edk2/ovmf/OVMF_CODE.fd
- compile the framebuffer example with `make efiimage E=framebuffer-example` 
(Code base: 2024.08 snapshot)
- start qemu with:
	qemu-system-x86_64 -cpu host -enable-kvm -m 2G -smp 2 -serial stdio -bios 
/usr/share/edk2/ovmf/OVMF_CODE.fd -kernel images/l4re_framebuffer-example.efi

This gives me the serial output in the terminal and the nice morphing spectrum 
window within mag on the qemu screen.

Cheers,
Philipp


Am 26.11.24 um 17:50 schrieb Martin Decky:
> Dear Lonnie,
> 
>> If it can be worked out in some way [..]
> 
> If you are targeting a native UEFI system, try the "efiimage" target that 
> generates a binary that can be booted directly from UEFI (just make sure you 
> boot the .efi file, not the .elf file). Or you can use the "chainloader" command 
> if you already use GRUB 2 as your boot loader for UEFI.
> 
> The framebuffer example should use the GOP framebuffer and not rely on the VESA 
> BIOS in this case.
> 
> If you also need an ISO image for UEFI, there is a patch upstream that provides 
> the "grub2efiiso" target as a convenience [1] (not in the snapshot release yet).
> 
> [1] 
> https://github.com/kernkonzept/mk/commit/ce9a28f474c2da4187a0c8f0ca2e43c288b870be
> 
> 
> Best regards
> 
> Martin Decky
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