One of my External Monitors is connected but gets no signal

MrEnxo · 2022-10-23 20:17:01

So both of my montiors are plugged into my gpu which is an NVIDIA 3070 FE. I have a monitor using HDMI and a monitor using Display Port. The monitor using HDMI is detected on start but no signal is sent to it. If I turn my monitor off unplug it and then turn it on and plug it back in, it usually gets signal. This only happens when I boot into arch though. If I boot into windows, the monitor works fine.
I have tried searching online for someone who has had this issue but havent found nothing

TLDR: One of my monitors gets no signal but is detected and it gets signal if i plug it back in and this only happens on arch

so yeah, If anyone has any idea whats going on that would be really helpful

MrEnxo · 2022-10-23 20:35:48

xrandr says both monitors are connected, even though the HDMI monitor gets no signal

cfr · 2022-10-23 23:32:51

Are you using KDE?

MrEnxo · 2022-10-23 23:43:36

Im using dwm

Édes · 2022-10-24 01:25:16

I have the exact same issue right now, it's my primary monitor that is using DP that works fine when logging in through tty and displaying grub, however once I log into dwm then my primary monitor receives no signal.

Likewise in windows it works completely fine, with no problem what so ever. However the trick where you turn off, unplug it and etc didn't work for me when I tried it, still no signal.

I downgraded nvidia, no change.

I tried to downgrade my kernal however it breaks my config and can't login.

Xrandr and nvidia-settings display that the monitor is there and working, I can move my mouse to the other monitor and open windows there, its just there is no signal for me.

Very confused on what the issue is, I have a feeling some kernal update or something broke everything, but I'm not sure...

[Edit]

I installed awesome windowm and lxde to see if it was the window manager or desktop environment but same result each time...

Last edited by Édes (2022-10-24 01:39:43)

cfr · 2022-10-24 03:29:07

I only asked about KDE because there's another thread about a similar issue where plasma seems to be the common factor.

I'd suggest posting the journal, Xorg log and information from xrandr before/after plugging/unplugging if that's a trigger.

seth · 2022-10-24 06:36:28

Symptoms and hardware fit https://bugs.archlinux.org/task/75995#comment211622 but that's supposed to be fixed in the 520xx driver.

Édes · 2022-10-24 21:52:54

Work around didnt work for me, might try using hdmi instead later see how that goes...

seth · 2022-10-24 22:13:13

Signal is breaking down on the cable?
What's the output of "xrandr -q" and can you use the output at a lower resolution?

Édes · 2022-10-24 22:25:50

Regular resolution of 1440p

Screen 0: minimum 8 x 8, current 4592 x 1440, maximum 32767 x 32767
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1920x1080+2672+180 (normal left inverted right x axis y axis) 598mm x 336mm
   1920x1080     60.00*+  74.97    59.94    50.00    60.05    60.00    50.04
   1680x1050     59.95
   1440x900      59.89
   1280x1024     75.02    60.02
   1280x960      60.00
   1280x800      59.81
   1280x720      60.00    59.94    50.00
   1152x864      75.00
   1024x768      75.03    70.07    60.00
   800x600       75.00    72.19    60.32    56.25
   720x576       50.00
   720x480       59.94
   640x480       75.00    72.81    59.94    59.93
DP-0 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 598mm x 336mm
   2560x1440     59.95*+ 150.00   144.00   120.00    99.95    84.98    23.97
   1024x768      60.00
   800x600       60.32
   640x480       59.94
DP-1 disconnected (normal left inverted right x axis y axis)

Resolution at 1080p

Screen 0: minimum 8 x 8, current 4592 x 1260, maximum 32767 x 32767
DVI-D-0 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1920x1080+2672+180 (normal left inverted right x axis y axis) 598mm x 336mm
   1920x1080     60.00*+  74.97    59.94    50.00    60.05    60.00    50.04
   1680x1050     59.95
   1440x900      59.89
   1280x1024     75.02    60.02
   1280x960      60.00
   1280x800      59.81
   1280x720      60.00    59.94    50.00
   1152x864      75.00
   1024x768      75.03    70.07    60.00
   800x600       75.00    72.19    60.32    56.25
   720x576       50.00
   720x480       59.94
   640x480       75.00    72.81    59.94    59.93
DP-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm
   2560x1440     59.95*+ 150.00   144.00   120.00    99.95    84.98    23.97
   1024x768      60.00
   800x600       60.32
   640x480       59.94
DP-1 disconnected (normal left inverted right x axis y axis)

Last edited by Édes (2022-10-24 22:26:58)

seth · 2022-10-25 07:10:30

Resolution at 1080p
DP-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm
2560x1440 59.95*+ 150.00 144.00 120.00 99.95 84.98 23.97

The only resolutions available for DP-0 are 2560x1440, 1024x768, 800x600 and 640x480 - you seem to simply have scaled the framebuffer, which is in software and useless.

xrandr --output DP-0 --mode 1024x768

Édes · 2022-10-26 21:07:21

Ok so changing it to 1024x768 gave a signal but obviously it was very small and cropped. Switching back to 2560x1440 gives it no signal again though

seth · 2022-10-26 21:10:05

Do you have anothe cable?

Édes · 2022-10-27 05:09:13

I tried a hdmi cable and it worked. However my gpu only has a hdmi and a display port so I'd have to swap the cables to see if the display port is the issue. However, I'm too lazy to do that right now, and it's really annoying considering I believe it has something to do with a software update or kernal update or something.

Maybe I'll try it another time when I have more time...

seth · 2022-10-27 07:13:52

it's really annoying considering I believe it has something to do with a software update or kernal update or something.

You can try the LTS kernel behavior, but while we're at affirming our faiths:
I believe it has something to do with the particular cable.
Because of rule #1

Édes · 2022-10-29 01:22:02

So I tried Linux LTS, did not solve the problem....

I swapped my cables around.... it solved the problem.....

Very weird the cable stopped working properly after a kernal update but I guess its conincidience or something. Thank you.

Also, what is rule #1?

seth · 2022-10-29 06:57:39

Rule #1: It's always the 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.

Édes · 2022-10-31 02:46:22

I'm not OP

Arch Linux

#1 2022-10-23 20:17:01

One of my External Monitors is connected but gets no signal

#2 2022-10-23 20:35:48

Re: One of my External Monitors is connected but gets no signal

#3 2022-10-23 23:32:51

Re: One of my External Monitors is connected but gets no signal

#4 2022-10-23 23:43:36

Re: One of my External Monitors is connected but gets no signal

#5 2022-10-24 01:25:16

Re: One of my External Monitors is connected but gets no signal

#6 2022-10-24 03:29:07

Re: One of my External Monitors is connected but gets no signal

#7 2022-10-24 06:36:28

Re: One of my External Monitors is connected but gets no signal

#8 2022-10-24 21:52:54

Re: One of my External Monitors is connected but gets no signal

#9 2022-10-24 22:13:13

Re: One of my External Monitors is connected but gets no signal

#10 2022-10-24 22:25:50

Re: One of my External Monitors is connected but gets no signal

#11 2022-10-25 07:10:30

Re: One of my External Monitors is connected but gets no signal

#12 2022-10-26 21:07:21

Re: One of my External Monitors is connected but gets no signal

#13 2022-10-26 21:10:05

Re: One of my External Monitors is connected but gets no signal

#14 2022-10-27 05:09:13

Re: One of my External Monitors is connected but gets no signal

#15 2022-10-27 07:13:52

Re: One of my External Monitors is connected but gets no signal

#16 2022-10-29 01:22:02

Re: One of my External Monitors is connected but gets no signal

#17 2022-10-29 06:57:39

Re: One of my External Monitors is connected but gets no signal

#18 2022-10-31 02:46:22

Re: One of my External Monitors is connected but gets no signal

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