Questions tagged [monitors]

Computer monitors (i.e. screens or displays). For system/application monitoring, please use the /monitoring tag.

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13 views

How can force Debian 10 to set black screen but staying activated for a ssh connection

I have a Debian 10 Buster installed. I have GDM3 as window manager launcher and enlightenment e17 also installed. I can't manage to get my monitor to black screen when I don't use it for example until ...
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9 views

FHD monitor only works after booting from other monitor and switching when running

This is a weird one.. I have a FHD AGI260T 26z monitor connected with DVI-D (computer) to VGA (monitor). Computer is a Cisco VXC 6215 box running Debian, Ubuntu or whatever live usb. Problem with all ...
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How can a udev symlink be made for a monitor?

I am currently using ddcutil to be able to change the brightness of all of my monitors at once but my script is flawed(slower) because I do not know the bus id's of my monitors ahead of time. I know ...
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41 views

Which Linux distros have good multi-monitor support for differing DPI, scaling and resolutions?

Which Linux distros have good multi-monitor support for differing DPI, scaling and resolutions? I have 4 27" monitors with 3 resolutions between them: 1080p, 1440p and 4k. Windows handles per ...
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Multi-Monitor Support and Keyboard Stack overflow issues in Kubuntu using KDE RDP

Having two issues. First question: I want to RDP from a Kubuntu PC into a Windows 10 box and make use of the 3 monitors on the local Kubuntu PC. If I can only get 'two' of the 3 monitors working, ...
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7 views

GSync/FreeSync status of plugged monitors

Is there any environment variable that we can check to know if GSync or FreeSync is activated? Or is there a software that can tell both for us? Or just one of them?
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External monitors and backlight control of internal monitor don't work with ThinkPad E14 Gen 3 (AMD Ryzen 5500U)

I have installed a Debian Sid with kernel version 5.10.0-7-amd64 on my new ThinkPad device. When I connect external monitors via the Lenovo USB-C dock or even the internal HDMI socket, they are not ...
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10 views

Screen turning off and on repeatedly when on GNOME lock screen

GNOME (or some related software) is breaking my monitor. Every time I lock GNOME (Super-l) the monitor goes into some sort of reset loop, alternately showing the lock screen and blacking out, each for ...
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24 views

Scale down my external display

I am using Elementary OS Hera.I have an external display (43 inch 1920x1080) and my primary display is my laptop (15.6 inch 1920x1080). When I connect the external display to my laptop, the font size ...
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1answer
35 views

Remove detected resolutions

There are many articles about how to add undetected resolutions. My problem is the opposite: gnome-control-center shows many resolutions I won't ever use. Here is my list with 33 entries on a ...
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27 views

Unable to detect second monitor via HDMI port

Fairly new to the Linux world but any support from the community would be appreciated. The core of the issue is I'm having a hard time understanding why my laptop isn't able to detect a secondary ...
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Multiple dummy monitors on remote headless Linux for VNC to local multiple monitors

I submit defeat. I have been trying to configure my remote Linux box to have two dummy monitors so that I can use multiple local monitors to VNC into it. I'm surprised that no one else has needed help ...
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1answer
21 views

How to save lxrandr settings for next time?

I am running Window Maker. I used lxrandr to set the screen size, and settings for when a second monitor is added. The problem is, after restarting the computer, it reverts to the default settings. ...
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234 views

How change monitors from terminal ? “xrandr: Cant open display”

I'm booting Sparkylinux from a live-usb in a notebook with broken screen. There is a external monitor connected by VGA. The external monitor is booted dual with the notebook monitor And the external ...
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Screen resolution not reliably detected/flashes at login prompt; ok once X starts

I have a file /etc/X11/xorg.conf.d/10-benq-bl2420pt.conf: Section "Monitor" Identifier "DVI-0" Modeline "2560x1440_60.00" 312.25 2560 2752 3024 3488 1440 1443 ...
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ubuntu 20.04 - usb-c to display port and issues with kernel log

I'm trying to connect a DisplayPort minitor on a laptop through a usb-c connector, However it does not work. I'm using ubuntu 20.04, uname -a: 5.8.0-50-generic #56~20.04.1-Ubuntu SMP Mon Apr 12 21:46:...
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Restrict monitor access to certain apps

I have two monitors setup on my machine. I would like to prevent some apps from accessing one of the two monitors while still granting permission to other apps. I would like to restrict an application ...
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Gnome settings only offers 49.99 Hz for a 60 Hz monitor

I have a 60 Hz monitor, but Gnome 40 settings only allows 49.99 Hz (and 29.99 Hz) in it's settings. I'm running Wayland, obviously. Why is that? Gnome's animations don't feel smooth either, can that ...
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41 views

Second Monitor Is Not Working Using USB-C Adapter

I am new to Ubuntu and I have just installed it on my laptop. I am using an external monitor that have an HDMI cable, so when I plugged in this cable directly in my PC(using the HDMI port) or using an ...
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37 views

Gnome segfaults when monitor sleeps (desktop, PopOS)

Desktop computer running PopOS (incl Nvidia driver), NVIDIA graphics, Intel i7. After some indeterminate amount of time my monitor goes to sleep, according to it's power saving settings (Can't be ...
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7 views

Monitor detected at splash screen, but not after

All in the title, The splash screen is displayed on both of my monitors, but after the splash screen, when I'm on my desktop, only my main screen display something, the second one goes off, and I can'...
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7 views

Can rEFInd delay the startup of a monitor?

Having an issue with a monitor not turning on when booting it's a power issue with the power strip I have to unplug an plug it back in. Is it possible through rEFInd to delay sending the power on ...
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My 2nd Monitor suddenly stopped working

So I was trying to use my second monitor on my Ubuntu laptop for class as usual, but for some reason it wasn't picking up signal from my laptop at all. I tried to see if it was a problem with my ...
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125 views

Multiple monitors quit working/not displayed in 'Displays' (CentOS 8)

dup of this post on Superuser I have been using the following kernels from my GRUB menu: CentOS Linux (4.18.0-240.15.1.el8_3.x86_64) 8 // broke it all CentOS Linux (4.18.0-240.1.1.el8_3.x86_64) 8 // ...
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123 views

How to get external monitor working with NVIDIA prime render offload?

My new laptop comes with AMD Radeon Graphics and NVIDIA Geforce GTX 1650 Ti 4GB. The laptop has got a really bad feature for me - the HDMI port is connected to the NVIDIA GPU. I use my external ...
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144 views

FreeBSD vidcontrol mode not working properly

I'm running FreeBSD 11.4 on an old Compaq Presario 3550. I want to take advantage of the full 1024x768 display, but vidcontrol doesn't seem to be working properly. This is what I've done so far: ...
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98 views

Turn off DDC/CI for my Monitor

I have 3 monitors. 2 are Dell the other is Asus. When I turn off all 3 monitors, and then turn them back on in the morning, all the windows that were open on on the Asus monitor have been moved to one ...
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1answer
27 views

how to get the status (on/off/lock) of the monitor of a remote host

I login to a remote ubuntu host by ssh. Is there any command that can check if the monitor of the remote host is power-on/off or locked?
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Does xrandr provide a way to add non persistent modes?

Xrandr is a pretty useful tool. It lets you configure monitors, and I'm pretty sure some of the things it can do are pretty much impossible on non xwindows systems. By default, newmode and addmode ...
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1answer
78 views

Disabled laptop monitor, can't reenable it

I wanted to switch off power to my laptop monitor when plugged in to an external monitor, as on my distro (Manjaro 20.2), disabling the laptop screen with xrandr/arandr doesn't switch off the ...
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23 views

Three external monitors with Choetech HUB-M21 on Open Suse

I recently bought a Choetech HUB-M21, which is a device with (among other things) three HDMI ports and two host ports. Host 1 talks to HDMI 1 and the USB devices, but ignores HDMI 2 and HDMI 3. ...
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312 views

Second monitor recognized, but displaying “no signal” - Ubuntu 20.04

I recently started using Ubuntu 20.04, and in all my installations I always get the same error when displaying my second monitor: "no signal". I can see that my cursor reaches another screen ...
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251 views

HDMI Port not working - Lenovo Thinkpad T570 with Ubuntu 20.04

I try to connect my Lenovo ThinkPad T570 via the HDMI port to my monitor but it seems like my Ubuntu 20.04.2 LTS using GDM3 does not recognize it. I already verified that the HDMI cable is working ...
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1answer
49 views

Linux blank screen on laptop, but external hdmi monitor works

I have Arch and Asus zenbook ux431f with i7 and nvidia mx150. After install -> blank screen on my laptop monitor but hdmi monitor works. After many researches i've found this https://github.com/...
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1answer
116 views

Ubuntu 18.04 handle 4k external monitor

I have an Ubuntu 18.04 on my PC, and I would like to use my external monitor with it. It's a LG UltraFine 27UL850-W that supports 4K display. However, when I plug it, it seems to be zoomed out ...
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92 views

Laptop screen not detected when closed/docked - Manjaro, kernel 5.10

I have a HP Elitebook 840 G5, and am using the Ultraslim docking station with it. If I boot the laptop on its own, not connected to the dock, all is fine. I can dock and undock without a problem. If ...
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1answer
152 views

Second monitor doesn't wake after going to standby (without annoying workaround)

Background I've had this issue in one way or another for a long time now (years), and in multiple configurations. I've updated the driver & kernel on multiple occasions, and at this point I'm ...
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22 views

Dual Monitor Setup Not Recognized - Same Monitor Model Name

I have an HP 9470m with on-board intel graphics. I have two Philips 272E1CA monitors. When I connect both, my computer is only recognizing one monitor even though the display is mirrored across both ...
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289 views

Linux Mint 20 Cinnamon won't use 144hz refresh rate, applications stuck at 60hz, mouse ok

This seems to be a bug even in Mint 20 using a Cinnamon desktop. When changing a monitors refresh rate to 144hz as shown in Display and Nvidia X Server Settings, I can apply the change, however only ...
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157 views

How to use a 4K monitor with 60Hz and HDMI 2 on Debian/KDE with onboard graphics / only free graphics drivers?

I have a 4K monitor capable of 60 Hz with HDMI 2. I have it connected to my machine with the 60Hz-capable cable that came with the monitor. However, in the Display options of KDE the highest Refresh ...
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36 views

My hdmi is disconected on xrandr. I can see it. How connect my second monitor?

I took my domputer for work remotely and after comming back and add the second monito via hdmi it doesnt work. it says it is disconnected: Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 ...
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289 views

xrandr --addmode fails with X Error of failed request: BadMatch

I can run this two commands correctly cvt 3840x2160 70 xrandr --newmode "3840x2160_70.00" 839.00 3840 4160 4584 5328 2160 2163 2168 2250 -hsync +vsync But then when I try to add the mode ...
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1answer
177 views

How do I simulate a smaller monitor within a large monitor?

I have a 23.8 inch monitor. Output of xrandr = Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 DP-1 disconnected (normal left inverted right x axis y axis) HDMI-1 disconnected (...
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26 views

ICC colour profiles reset after reboot

I just made a fresh install of Linux Mint 20 Cinnamon and I'm having troubles with the colour profiles of my monitor. I previously made my own ICC files using a calibration device. In my new ...
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65 views

Monitor resolution issue

I've got a new monitor, 5120x1440, but I can't make it work. I use OpenSUSE Tumbleweed, but I don't even know if it's distribution related or not. When I set the resolution with this command: xrandr --...
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External monitor output halts after switching sources on monitor

I have several machines plugged into an external monitor, one of which is a laptop running arch. I can switch sources on the monitor to toggle between these three different systems. But if I stay on a ...
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228 views

X11 not setting primary monitor according to config file

^_^ Synopsis I want to specify my primary monitor using system-wide X11 configuration files, but my present configuration files don't seem to do anything! 0_0 My situation I'm coming from the same ...
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3answers
339 views

Run Linux with or without monitor

I am trying to run a program on Ubuntu MATE 20.04 that needs to have a graphical output to function. Sometimes I will attach a monitor and sometimes I will not. I would like to configure my computer(a ...
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15 views

Monitor is zoomed in but defaults are turned off

So my monitor has all of a sudden been zoomed in. I am new to linux and not sure what I did. Everything was fine and the next day only 1 of the 2 monitors is zoomed in. So I feel as though I can ...
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1answer
1k views

Can't set DisplayPort output to 4k@60hz on the new Huawei Matebook 14 AMD

Just this week I got the newest Matebook 14 2020 AMD with the 4800H. On windows I'm using an UtechSmart USB-C hub to output 4K@60Hz to my monitor so physically I know it's possible. Linux, however, is ...

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