is 4k desktop possible on freebsd-12?

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is 4k desktop possible on freebsd-12?

John-15
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?

thanks,

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

Slawa Olhovchenkov
On Wed, Oct 10, 2018 at 11:17:03AM +0100, tech-lists wrote:

>
> 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?

for 4K@60FPS you need DP connection.
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Re: is 4k desktop possible on freebsd-12?

John-15
On 10/10/2018 13:45, Slawa Olhovchenkov wrote:
> for 4K@60FPS you need DP connection.

problem is monitor only has HDMI. I'm not sure it'll 4k@30fps is an
acceptable mode for it; need to check

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

cpuctl devcpu
 Hi,
The HDMI 2.1 specification (need cables and ports at that level).  It goes to 10K (really) at 120 HZ.    I believe 1.4 supports 60 HZ but FPS tends to be limited to 30 at 4K resolution.  (this is limit of my understanding at this point)
P

    On Wednesday, October 10, 2018, 10:01:38 AM EDT, tech-lists <[hidden email]> wrote:  
 
 On 10/10/2018 13:45, Slawa Olhovchenkov wrote:
> for 4K@60FPS you need DP connection.

problem is monitor only has HDMI. I'm not sure it'll 4k@30fps is an
acceptable mode for it; need to check

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

John-15
In reply to this post by John-15
On 11/10/2018 10:18, Johannes Lundberg wrote:
> Do you have anything configured in /etc/X11/xorg.conf?

no. But there's a section in the handbook I missed; am reading it now

thanks,

--
J.
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