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#1 2022-04-13 12:30:29
- faquad
- Member
- Registered: 2022-04-13
- Posts: 3
xrandr treats two external monitors as one
Hi!
I use a laptop and have two extra old screens on the side.
I want both of them plugged in, so I have to use an HDMI splitter.
Each screen works normally when connected to the laptop directly, but when i use the HDMI splitter, they seem to be treated as one screen.
The best I've gotten so far is a duplicated image, and I would like each of the screens to be a separate workspace.
Here's the xrandr output:
$ xrandr
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
1920x1080 60.02*+ 60.01 59.97 59.96 59.93 48.02
1680x1050 59.95 60.02 59.88
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.02 60.02
1440x900 60.02
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1280x800 59.99 60.02 59.97 59.81 59.91
1280x720 60.00 60.02 59.99 59.86 59.74
1024x768 60.02 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.02 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
700x525 59.98
800x450 59.95 59.82
640x512 60.02
700x450 59.96 59.88
640x480 60.02 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
640x400 59.88 59.98
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
HDMI-1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 621mm x 341mm
3840x2160 30.00 +
2880x1620 59.97
2560x1600 59.97
2560x1440 59.95 59.95
2048x1536 60.00
1920x1440 75.00 60.00
1856x1392 75.00 60.01
1792x1344 75.00 60.01
2048x1152 59.98 59.90 59.91
1920x1200 30.00 59.88 59.95
1920x1080 59.97 59.96* 60.00 60.00 50.00 59.94 59.93 30.00 24.00 29.97 23.98
1600x1200 30.00 75.00 70.00 65.00 60.00
1680x1050 59.95 59.88
1400x1050 74.76 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 75.02 60.02
1440x900 59.90
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1280x800 30.00 59.99 59.97 59.81 59.91
1152x864 75.00
1280x720 60.00 59.99 59.86 60.00 50.00 59.94 59.74
1024x768 75.05 60.04 75.03 70.07 60.00
960x720 75.00 60.00
928x696 75.00 60.05
896x672 75.05 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
832x624 74.55
960x540 59.96 59.99 59.63 59.82
800x600 75.00 70.00 65.00 60.00 72.19 75.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
720x576 50.00
700x525 74.76 59.98
800x450 59.95 59.82
720x480 60.00 59.94
640x512 75.02 60.02
700x450 59.96 59.88
640x480 60.00 75.00 72.81 75.00 66.67 60.00 59.94
720x405 59.51 58.99
720x400 70.08
684x384 59.88 59.85
640x400 59.88 59.98
576x432 75.00
640x360 59.86 59.83 59.84 59.32
512x384 75.03 70.07 60.00
512x288 60.00 59.92
416x312 74.66
480x270 59.63 59.82
400x300 72.19 75.12 60.32 56.34
432x243 59.92 59.57
320x240 72.81 75.00 60.05
360x202 59.51 59.13
320x180 59.84 59.32
DP-1 disconnected (normal left inverted right x axis y axis)I couldn't find a post dealing with this issue, so feel free to direct me elsewhere.
Thanks in advance!
Last edited by faquad (2022-04-13 18:12:33)
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#2 2022-04-13 13:12:43
- seth
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- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 76,705
Re: xrandr treats two external monitors as one
I'm afraid that's the concept and design of a HDMI splitter - you're not getting another output or CRTC.
Why don't you use DP-1 (in doubt using a DP to HDMI converter)?
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#3 2022-04-13 16:43:21
- greembow
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- Registered: 2022-02-23
- Posts: 35
Re: xrandr treats two external monitors as one
HDMI Splitters just split the video signal and send it to the various screens. To xorg, there are not 2 screens plugged into the HDMI port. It's one screen, and it outputs video on it. Xorg has no way to use the HDMI splitter to turn one display output into to separate outputs. That's just not what the splitters do.
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#4 2022-04-13 16:48:14
- faquad
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- Registered: 2022-04-13
- Posts: 3
Re: xrandr treats two external monitors as one
I have a ThinkPad E15 Gen 2, so unless I'm missing something, I only have the one HDMI port.
Would it work if I plugged the HDMI-DP cable into the splitter? Is that what you're getting at or am I misunderstanding?
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#5 2022-04-13 16:50:37
- seth
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- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 76,705
Re: xrandr treats two external monitors as one
The output might not be wired to a jack or the DP and HDMI output share a jack.
In any event: "no" - adding an adapter to the splitter won't do anything. The splitter is effectively a Y-cable.
Edit: the DP is probably forwarded from the USB-C dock available for the notebook. Which would allow you to have a multiscreen output (as will, potentially, a USB-C to DP adapter - at the cost of the usb port)
Last edited by seth (2022-04-13 16:55:11)
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#6 2022-04-13 18:11:31
- faquad
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- Registered: 2022-04-13
- Posts: 3
Re: xrandr treats two external monitors as one
Oof.
I might invest into one of those docking station things eventually, but the 3 monitor dream is goin on hold for a while I guess.
Thanks for the replies :)
Last edited by faquad (2022-04-13 18:12:39)
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