support for the Picasso APU in amdgpu

greg at unrelenting.technology greg at unrelenting.technology
Thu Jan 23 17:56:26 UTC 2020


January 23, 2020 8:43 PM, "Kurt Hackenberg" <kh at panix.com> wrote:

> On 2020-01-22 21:58, Bakul Shah wrote:
> 
>> I installed drm-kmod (drm-fbsd12.0-kmod-4.16.g20200115 &
>> drm-kmod-g20190710) and also xf86-video-amdgpu-19.0.1. I see
>> /dev/drm/ but Xorg terminates as /dev/dri doesn't exist.
> 
> If I understand how this stuff works, you shouldn't install both. I think xf86-video-amdgpu makes
> the X server deal with the GPU directly, rather than going through /dev/dri and kernel
> mode-setting. I think drm-kmod is preferred, and xf86-video-amdgpu is deprecated.

No, this is completely wrong.

Only really ancient drivers made the X server deal with the GPU directly.

xf86-video-amdgpu is very similar to the builtin 'modesetting' DDX, but it has some slight improvements (more attempts at dealing with screen tearing).


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