[coreboot] ISOLINUX gfx problems under qemu/coreboot/SeaBIOS

Jonathan Neuschäfer j.neuschaefer at gmx.net
Tue Oct 25 15:01:49 CEST 2016

On Tue, Oct 25, 2016 at 08:20:12AM +0200, Philipp Stanner wrote:
> Sure: Do the following:
>  1. qemu-img create test.img 10G
>  2. qemu-system-x86_64 -enable-kvm -hda test.img -cdrom ubuntu.iso -boot
>     d -m 512
>  3. Install ubuntu on test.img
> After installing, boot the new virtual machine with your self-build bios:
>   * qemu-system-x86_64 -enable-kvm -hda test.img -m 512 -bios
>     build/coreboot.rom
> See how the machine starts successfully, using the 'broken' seabios.
> Ubuntu boots successfully. Even starting my Windows7-machine nearly
> works, but while "Windows is loading files" is written the virtual
> screen / text becomes yellow and booting stops.
> But Ubuntu can successfully be booted and used absolutely normaly with
> cb+seabios - only installing seems impossible and the errors you
> (Jonatahan) described, appear.

Ah, that's probably because Ubuntu boots through GRUB when it's
installed, and GRUB doesn't need the graphical mode that ISOLINUX uses.

Jonathan Neuschäfer
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