Re: is 4k desktop possible on freebsd-12?

On Wed, Oct 10, 2018 at 11:18 AM tech-lists <tech-lists_at_zyxst.net> wrote:

> Hi,
>
> I'm trying to get xorg to display 4k. The context is:
>
> FreeBSD 12.0-ALPHA8 r339084 amd64
> ports r481640
> AMD RX580 GPU
> Asus X99 Extreme3 mobo
> cpu: intel e5-2699v4
> 48GB RAM
> Samsung UE48JU6410U monitor connected via HDMI
>
> drm-next-kmod-4.11.g20180822
> libdrm-2.4.93,1
> xf86-video-amdgpu-18.1.0
> xf86-video-ati-18.1.0,1
> xf86-video-openchrome-0.6.0_3
> xf86-video-scfb-0.0.4_7
> xf86-video-vesa-2.4.0_2
> linux_base-c7-7.4.1708_6 and all its xorg/mesa libs
>
> /var/log/Xorg.0.log has this:
>
> [  3470.966] (II) AMDGPU(0): Printing probed modes for output HDMI-A-0
> [  3470.966] (II) AMDGPU(0): Modeline "1920x1080"x60.0  148.50  1920
> 2008 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz e)
> [  3470.966] (II) AMDGPU(0): Modeline "1680x1050"x59.9  119.00  1680
> 1728 1760 1840  1050 1053 1059 1080 +hsync -vsync (64.7 kHz e)
> [  3470.966] (II) AMDGPU(0): Modeline "1600x900"x60.0  108.00  1600 1624
> 1704 1800  900 901 904 1000 +hsync +vsync (60.0 kHz e)
>
> but further along we have this:
>
> [  3474.097] (II) AMDGPU(0): EDID vendor "SAM", prod id 3140
> [  3474.097] (II) AMDGPU(0): Using EDID range info for horizontal sync
> [  3474.097] (II) AMDGPU(0): Using EDID range info for vertical refresh
> [  3474.097] (II) AMDGPU(0): Printing DDC gathered Modelines:
> [  3474.098] (II) AMDGPU(0): Modeline "3840x2160"x0.0  297.00  3840 4016
> 4104 4400  2160 2168 2178 2250 +hsync +vsync (67.5 kHz eP)
> [  3474.098] (II) AMDGPU(0): Modeline "1920x1080"x0.0  148.50  1920 2008
> 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz e)
> [  3474.098] (II) AMDGPU(0): Modeline "800x600"x0.0   40.00  800 840 968
> 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
>
> and
>
> [  3474.211] (II) AMDGPU(0): Printing DDC gathered Modelines:
> [  3474.211] (II) AMDGPU(0): Modeline "3840x2160"x0.0  297.00  3840 4016
> 4104 4400  2160 2168 2178 2250 +hsync +vsync (67.5 kHz eP)
> [  3474.211] (II) AMDGPU(0): Modeline "1920x1080"x0.0  148.50  1920 2008
> 2052 2200  1080 1084 1089 1125 +hsync +vsync (67.5 kHz e)
> [  3474.211] (II) AMDGPU(0): Modeline "800x600"x0.0   40.00  800 840 968
> 1056  600 601 605 628 +hsync +vsync (37.9 kHz e)
>
> so would this indicate the card is 4k capable but the HDMI port on the
> card is not? Or the port on the monitor? Or something else?
>
>
Hi

What is the actual problem? Do you get any 4K modes listed when you run
'xrandr' ?
I've been running 4K_at_60FPS on an external display for a long time on my
Intel laptops. However, that requires DP output. Your HDMI output is most
likely limited to 30 FPS (but should still display 4K resolution...).

thanks,
>
> --
> J.
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