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#1 2021-10-06 08:02:28

arthurw
Member
Registered: 2019-09-03
Posts: 24

[SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

hi,
i have an Thinkpad P14s Gen 2 AMD on an Thinkpad USB-C Dock Gen 2.
Latest Arch installed. Wayland, Gnome.
I want to connect an 4k@60Hz Monitor on the Dock via HDMI 2.0.
But as well via laptop port as via dock i only get 4k@30Hz, HDMI 1.4
But the laptop supports HDMI 2.0, the dock supports HDMI 2.0 and i have an HDMI 2.0 cable.
Please help, i'm very frustrated.
Regards,
Arthur

Last edited by arthurw (2021-10-07 07:03:10)

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#2 2021-10-06 09:41:42

sabroad
Member
Registered: 2015-05-24
Posts: 223

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

Some monitors (my own included) support HDMI 2.0 only on certain ports.


--
saint_abroad

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#3 2021-10-06 09:45:57

arthurw
Member
Registered: 2019-09-03
Posts: 24

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

Thanks sabroad, i will test this

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#4 2021-10-06 12:09:43

seth
Member
Registered: 2012-09-03
Posts: 25,019

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

i have an HDMI 2.0 cable.

Such thing doesn't exist.
The actual, legit version tag you're looking for (I'm not making this  up) is "HDMI Premium High Speed", the "premium" is important (again: this is not a prank, this *is* the official cable "version")
Alternatively "HDMI Ultra High Speed" (one grade higher)

You can also try adding this modeline

% cvt12 3840 2160 60 -b
# 3840x2160 @ 60.000 Hz Reduced Blank (CVT) field rate 60.000 Hz; hsync: 133.320 kHz; pclk: 522.61 MHz
Modeline "3840x2160_60.00_rb2"  522.61  3840 3848 3880 3920  2160 2208 2216 2222 +hsync -vsync

https://wiki.archlinux.org/title/Xrandr … esolutions

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#5 2021-10-06 13:14:39

arthurw
Member
Registered: 2019-09-03
Posts: 24

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

Thanks for your reply. I have an HDMI Premium High Speed cable an i am using wayland, so xrandr is not working

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#6 2021-10-06 13:23:21

seth
Member
Registered: 2012-09-03
Posts: 25,019

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

Can you try Xorg?

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#7 2021-10-06 16:47:22

arthurw
Member
Registered: 2019-09-03
Posts: 24

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

Solution: It was an monitor setting. Thanks to all and the community.

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#8 2021-10-06 17:41:50

seth
Member
Registered: 2012-09-03
Posts: 25,019

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

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#9 2021-10-07 05:47:13

arthurw
Member
Registered: 2019-09-03
Posts: 24

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

I wanted to do this yesterday, but i could not found the mark as resolved button. Where can i resolve this issue?

Last edited by arthurw (2021-10-07 05:50:51)

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#10 2021-10-07 07:01:16

seth
Member
Registered: 2012-09-03
Posts: 25,019

Re: [SOLVED] 4k@30Hz although hdmi 2.0 port, dock and cable

seth wrote:

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

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