suijingfeng
2023-Sep-07 12:32 UTC
[Nouveau] [RFC, drm-misc-next v4 0/9] PCI/VGA: Allowing the user to select the primary video adapter at boot time
Hi, On 2023/9/7 17:08, Christian K?nig wrote:> Well, I have over 25 years of experience with display hardware and > what you describe here was never an issue.I want to give you an example to let you know more. I have a?ASRock AD2550B-ITX board[1], When another discrete video card is mounted into it mini PCIe slot or PCI slot, The IGD cannot be the primary display adapter anymore. The display is totally black. I have try to draft a few trivial patch to help fix this[2]. And I want to use the IGD as primary, does this count as an issue? [1] https://www.asrock.com/mb/Intel/AD2550-ITX/ [2] https://patchwork.freedesktop.org/series/123073/
Christian König
2023-Sep-07 12:43 UTC
[Nouveau] [RFC, drm-misc-next v4 0/9] PCI/VGA: Allowing the user to select the primary video adapter at boot time
Am 07.09.23 um 14:32 schrieb suijingfeng:> Hi, > > > On 2023/9/7 17:08, Christian K?nig wrote: >> Well, I have over 25 years of experience with display hardware and >> what you describe here was never an issue. > > I want to give you an example to let you know more. > > I have a?ASRock AD2550B-ITX board[1], > When another discrete video card is mounted into it mini PCIe slot or > PCI slot, > The IGD cannot be the primary display adapter anymore. The display is > totally black. > I have try to draft a few trivial patch to help fix this[2]. > > And I want to use the IGD as primary, does this count as an issue?No, this is completely expected behavior and a limitation of the hardware design. As far as I know both AMD and Intel GPUs work the same here. Regards, Christian.> > [1] https://www.asrock.com/mb/Intel/AD2550-ITX/ > [2] https://patchwork.freedesktop.org/series/123073/ >