[coreboot] No external PCIe GPU possible/working on Gigabyte g41m-es2l

[qma ster]

Maybe to fix this PCIe GPU issue he just needs to edit a
*./coreboot/src/device/Kconfig
*file?


*./coreboot/src/device/Kconfig*
change

config MULTIPLE_VGA_ADAPTERS
   bool
   default n

to

config MULTIPLE_VGA_ADAPTERS
   bool
   default y

and completely rebuild the coreboot

I enabled these options for my G505S laptop with both integrated/discrete
graphic, however I am not a gamer so can't notice if there is any positive
effect from this option. But maybe this option will significantly improve
the thread starter's eGPU experience? What do you think ?

2017-02-28 0:57 GMT+03:00 Arthur Heymans <arthur at aheymans.xyz>:

> Stefan Reinauer <stefan.reinauer at coreboot.org> writes:
>
> > * i1w5d7gf38keg at tutanota.com <i1w5d7gf38keg at tutanota.com> [170226
> 21:59]:
> >> Hardware: Gigabyte g41m-es2l, latest coreboot git, latest seabios git,
> two
> >> nvidia gpu cards tested
> >>
> >> I tried to use some external GPU on a g41m-es2l to get some digial
> screen
> >> output. It does not seem to work. When having build coreboot with native
> >> vga-init for the internal intel gpu, i never get a output from the
> nvidia card.
> >> When i connect the analog VGA cable to the internal intel gpu and boot
> up i can
> >> see many nouveau (memory-space?) errors. Both GPUs (nvidia and intel)
> are then
> >> enabled at once. Kernel 4.10 cant boot.
> >>
> >> I tried removing the native vga-init. The only change is then that the
> Intel
> >> GPU works only when the kernel have load. Nvidia card deliver still same
> >> errors.
> >>
> >> With OEM-bios the intel card gets disabled and a PCIe GPU works fine.
> >
> > Please provide coreboot boot logs.
> >
> > Stefan
>
> Actually https://review.coreboot.org/#/c/18504/
> https://review.coreboot.org/#/c/18511/ (not sure if needed) and
> https://review.coreboot.org/#/c/18513/ (works but might be improved)
> fix this issue.
>
> --
> Arthur Heymans
>
> --
> coreboot mailing list: coreboot at coreboot.org
> https://www.coreboot.org/mailman/listinfo/coreboot
>
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