[vfio-users] vfio-pci disable_vga but still t rying to switch....

[Quentin Deldycke]

My huge blame,

In fact, when CSM is disabled, the "primary graphics adapter" parameter in
bios is ignored.

Bios and grub are displayed threw Radeon card. (screen was auto switching
input without displaying popup... but with IGD cable unplugged and set to
another screen...)

Someone faced the problem.

--
Deldycke Quentin


On 12 March 2016 at 15:13, Quentin Deldycke <quentindeldycke at gmail.com>
wrote:

> Hello,
>
> I wanted to disable CSM on my computer (asrock extreme 6)
>
> I got host graphics using intel card (0.02), vm graphics using r9 290 (01)
> and i want to be able to have another card (02) (actually a old HD 5870, if
> it work a nice 4k ready nvidia card)
>
> But, when i disable CSM, the computer doesn't manage to start X:
>
> On screen the log says and stay block at last  line:
>
> Mar 12 14:54:34 lindesk kernel: vgaarb: setting as boot device:
> PCI:0000:00:02.0
> Mar 12 14:54:34 lindesk kernel: vgaarb: device added:
> PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
> Mar 12 14:54:34 lindesk kernel: vgaarb: device added:
> PCI:0000:01:00.0,decodes=io+mem,owns=none,locks=none
> Mar 12 14:54:34 lindesk kernel: vgaarb: device added:
> PCI:0000:02:00.0,decodes=io+mem,owns=none,locks=none
> Mar 12 14:54:34 lindesk kernel: vgaarb: loaded
> Mar 12 14:54:34 lindesk kernel: vgaarb: bridge control possible
> 0000:02:00.0
> Mar 12 14:54:34 lindesk kernel: vgaarb: overriding boot device:
> PCI:0000:01:00.0
> Mar 12 14:54:34 lindesk kernel: vgaarb: bridge control possible
> 0000:01:00.0
> Mar 12 14:54:34 lindesk kernel: vgaarb: no bridge control possible
> 0000:00:02.0
> Mar 12 14:54:34 lindesk kernel: vgaarb: device changed decodes:
> PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=none
>
> however, as the pc boot fine (but without video), threw ssh i know that
> after these lines are printed:
> Mar 12 14:54:35 lindesk kernel: snd_hda_intel 0000:02:00.1: Handle
> vga_switcheroo audio client
> Mar 12 14:54:35 lindesk kernel: vgaarb: device changed decodes:
> PCI:0000:01:00.0,olddecodes=none,decodes=none:owns=none
> Mar 12 14:54:35 lindesk kernel: vgaarb: device changed decodes:
> PCI:0000:00:02.0,olddecodes=io+mem,decodes=none:owns=io+mem
>
> I think that, at boot, intel card is used, bios, grub and start of boot.
> Then the kernel tries to use the r9 290 card on slot 01:00.0 as default
> vga card
>
> And only after the disable_vga boot parameter is used to disable the same
> card...
>
>
>
> Right now, without CSM, pc doesn't boot graphics
> What i want: host on intel and vm using r9.
>
> Does someone have any clue? Why does a uefi ready card try to get vga?
>
> --
> Deldycke Quentin
>
>
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