Questions tagged [monitor]

Questions that relate to the electronic display (sometimes called a visual display unit) for computers. Typically questions relate to visual issues such as flickering, resolution, black-screens together with the usage of single and multiple displays.

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Screen blackouts and disconnects using USB-C

I have a ThinkPad T480s laptop connected to a Dell P3222QE 32" 4K monitor via USB-C. I only use the external monitor and have disabled the laptop screen. I use 4k at 60 Hz and run Ubuntu 22.04. ...
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HDMI disconnects

So i have a laptop connected to a 240hz monitor. I usually use 120hz. However, when i open some applications or type "xrandr" in console to look at my settings, the HDMI disconnects for a ...
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second monitor shown despite not having one

Hi I recentliy updated to ubuntu 22.04. There I tried to connect a second monitor which didn’t work. Know after unplugging the monitor it constantly showes me that a second Unknow Device is connected. ...
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How do I get my AOC 34" Monitor to a refresh rate of 144Hz instead of 30Hz?

I just got this monitor and by running xrandr I can see that it only supports 30Hz at a 3440x1440 resolution. I'd like for it to be running at 144Hz. How do I do this? I'm using the HDMI cable that ...
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Full HD monitor resolution won't work even after adding xrandr mode

I've been having trouble with my monitor resolution. Originally the maximum I could choose in the settings menu was 1024x768. After running cvt 1920 1080, xrandr --newmode "1920x1080_60.00" ...
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Second and third monitor only detected after reboot - Kubuntu 20.04

I tried almost everything to force detection of my monitors. E.g. # ctrl-alt-F1 sudo service sddm restart # F2 xrandr --auto It does not matter what I try. My monitors will only get detected after ...
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Apache monitoring tool that reads and organize Apache Logs

I got tired looking for a GUI tool that just read and organize Apache log files. Reading several redundant lines of the log file is a hill. I searched here and Google for a free GUI tool that performs ...
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External monitor doesn't work (no signal) on Ubuntu 21.10 - Intel Iris Xe graphics

I have an issue with my external monitor which doesn't work on Ubuntu 21.10 with 5.17.2 kernel on it. It seems to be detected in "Displays" section in settings, but when I try to use enable ...
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Dark Screen after Boot Screen. Happened after I tried to make Ubuntu work with wide screen monitor

I followed this guide to make Ubuntu work with wide a screen monitor : https://askubuntu.com/a/818153 Unfortunately Ubuntu crashes. When I rebooted it, it displays dark screen after the Ubuntu boot ...
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How to check if external monitor is turned on and connected

I'm looking for a scripted way to check if the external monitor is on and connected. My Ubuntu laptop often fails to turn on the external monitor after sleep or a blank screen. I've long since solved ...
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Blank/blinking screen after login or unlock - Fresh 20.04 install

So i installed Ubuntu 20.04 in my laptop and i'm having this issue. Here is a short video: blinking Some details: When I login in ubuntu my computer screen is blank It also happens after login if the ...
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when i attempt to move my 2nd monitors position to the left side instead of the right, it does this

My 2nd monitor seems to cut into my first monitor and kind of cut off the screen, when i click on one monitor it clicks the same spot on the other, anyone know why its doing this?
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How to list all available brightness settings with ddcutil

I know I can see the current and max values with ddcutil getvcp 0x10 VCP code 0x10 (Brightness ): current value = 75, max value = 100 But is there a way to see all the ...
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Dummy monitor in 21.10

Until 20.04 I was able to create a fake monitor for remote access of an headless machine in this way: $ sudo apt install gnome-session gdm3 $ sudo systemctl set-default graphical.target $ sudo apt ...
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Monitor issue Ubuntu 20.04

I am using Ubuntu 20.04 LTS “Focal Fossa". Recently, I did some changes in the appearance settings. After that when I log in, the monitor goes off. Can you please advise what could be the problem?...
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Monitor Not Sleeping Ubuntu 20.04.4 LTS With Wayland

I am using Ubuntu 20.04.2 LTS with Wayland for the windowing system. Pretty much everything has been great except the monitor doesn't even go to sleep. The screen locks and blanks when inactive, but ...
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Laptop Not Suspend when Lid Closed "every other time"

My ubuntu 20.04 laptop used to always suspend wen the lid was closed, UNTIL I plugged in a monitor for the first time. I realized this error AFTER I unplugged the monitor. I think that the monitor has ...
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Ubuntu 20.04does not recognize second monitor

My main monitor is a dell, recognized by Ubuntu 20. I also have an hp, plugged in with a VGA to USB connector, but Ubuntu does not recognize it.
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Linux not registering external DVI monitor

We have a Linux computer (Ubuntu 20.04) but currently it is not registering an external monitor with DVI cable. When we go to the Display Setting the screen does not show up. Thank you.
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Thunderbolt bandwidth monitoring

I'm looking for a tool to monitor the current Thunderbolt bandwidth usage (in Gbits/s). Is there such a thing? I'm running on Ubuntu 16.04 LTS.
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I cannot use an external monitor & Ubuntu 20.04

I use Ubuntu 20.04. I cannot use an external monitor. How can I make it work? When I plug an external monitor (which is perfectly working with a Windows laptop), I cannot get it to work for Ubuntu 20....
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Acer Swidt 3 AMD Ryzen 5/Amd Radeon Grpahics External Monitor "No Signal"

I'm stumped, I have searched up and down this forum and others with solutions for others and cannot figure out a solution. For reference I am not the most skilled Ubuntu user but am using it for class....
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Bizarre and Temporary black screens in ubuntu 20.04.3 LTS

After maximizing applications, sometimes they cause the screen to go blank - maximizing YouTube will work fine, until it doesn't and I have to exit full screen using a keybind, and go back into it. ...
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Can't properly select lower resolution for external monitor

I've got a funny problem with an external monitor which is actually an eink android tablet that can double as an HDMI monitor. It's called the Dasung Not-eReader 103. I'm trying to use this to reduce ...
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Display looses resolution in Ubuntu 20.04.3 LTS if monitor switch is not connected to another pc

I have a fresh installation of Ubuntu 20.04.3 LTS in a desktop which shares the screen with my laptop via a monitor switch. I have a set a custom resolution using cvt 1680 1050 # 1680x1050 59.95 Hz (...
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Problem on screen

I just installed Ubuntu. When something is moving fast on the screen, such as when I scroll through a browser or watch a movie. It is as if the computer can not process. The problem is not the refresh ...
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LG 34WN750 monitor problem?

I am having problems with monitor, same as @moneyball described in his post. The monitor was connected to a Dell WD15 usb c dock. And the dock to my dell laptop. When the monitor started showing the ...
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Laptop screen full of snow when waking up, temporally fixed by restarting

I have a TUXEDO Pulse 14 Gen1 running 20.04.1-Ubuntu. Since yesterday, every time I wake up my laptop from sleep or hibernation, the laptop screen is full of snow. I have not installed any new drivers ...
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Laptop monitor looks like "TV with no signal" after battery discharge

After my laptop unload the battery, the monitor looked like this. Is not the hardware because when I turn on the laptop, it gives me image on this monitor. After the crypto password, the images gets ...
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Ubuntu black screen after login

So a few days ago, after login into my Ubuntu (18.04) it was showing nothing but a black screen. I tried updating it to 20.04 through tty. It didn't work. What worked is at last by deleting ~/.config/...
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color calibration

I bought a Datacolor SpyderX because I need to color calibtrate my Laptops and according to the site it was supported. One computer is runnung Ubuntu 20.04 LTS and one 21.10. With one it is possible ...
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No video display when opening Settings app and login on Ubuntu 20.04

I have Ubuntu 20.04 installed on an Intel NUC (NUC7i7BNK). The NUC has an Intel Iris Plus 650 GPU (and no NVIDIA cards inside). The monitor I am using is DELL P2311H. The monitor does not support HDMI ...
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Black screen after booting Kubuntu 20.04

Well, I have notebook with Kubuntu 20.04 with internal intel GPU only, and I noticed that after sleep mode notebook display becomes black. When I rebooting laptop, I see kubuntu logo and then black ...
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HDMI-0 Disconnected When Plugged In Ubuntu 21.10

My external monitor (Classified as HDMI-0) is not turning on or being detected when I plug the HDMI in my computer. I have tried replugging the monitor in as well as restarting my computer. Here is ...
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Manually reduce refresh rate with Nvidia proprietary drivers

I have a Lenovo Legion 5 running Ubuntu 21.04, OEM Kernel 5.11.0-41, nvidia-driver-470, RTX 3050 mobile. The built-in display refresh rate is stuck at 165 according to xrandr, despite only officially ...
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Ubuntu doesn't support the necessary drivers for my adapter. What should I do?

I am trying to connect two monitors to my laptop which is running Ubuntu alongside Windows 10 as dual boot. I plugged the first monitor to the HDMI port and the second to the usb 3.0 port via a usb to ...
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monitor not recognized after update

I installed 20.04-2 and my monitor was recognized: Dell 1920x1080 I upgraded to get the latest software. The monitor is no longer recognized (no monitor is) and I end up with 800x600
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Monitor Stops Working on Ubuntu Raspberry Pi 4

I have installed Ubuntu 21.10 on my Raspberry Pi 4 Model B. I try to connect it to my monitor, and it starts up find, and sometimes I'll even see the login screen, before I lose connection. The only ...
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Monitor power saving not activating in 20.04

The screen starts to dim but then when it's all black the backlight doesn't turn off and the cursor is still showing. Could this have something to do with the "no suitable video mode found" (...
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How to map touchscreen to primary monitor automaticaly

I use a board with 2 monitors and a touchscreen(Vendor is Weida). I use the DP-1 monitor as the primary monitor and eDP-1 as an extended monitor. When I power on the board the touch screen will map to ...
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HDMI-1 disconnected Ubuntu 21.10 Intel integrated graphics

I'm running a Lenovo Horizon 2E with Ubuntu Studio 21.10 and laptop has a Mesa Intel HD 4400 integrated graphics I'm struggling to get my HDMI port working...!!! I have Sony Bravia monitor is ...
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Is there HDR monitor support in Ubuntu

More monitors have the HDR (high dynamic range) functionality. Does Ubuntu (Linux) support this, too?
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Monitor is turning off and on while logging into Ubuntu 21.10

While I'm logging in my monitor goes black, then is turned off and on. I can log in and everything seems to work fine, but I'm wondering whether this behaviour is normal. I have bought a new GPU and ...
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Solving old monitor woes

I decided to install Ubuntu to replace Windows on an old system of mine. So far, I am having troubles with the display. This display was also an inconvenience on Windows 10, and so the same root cause ...
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Is the monitor ubuntu boots on hardwired during installation?

I installed 20.04 on a new machine using an old monitor connected to HDMI. After it worked, I moved it to a different location and plugged a UHD resolution monitor into the display port connection on ...
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Ubuntu 20.04 loses monitor resolution after waking from sleep

I have an Nvidia RTX 3070 and a Samsung C49RG90 monitor. The monitor is connected to the video card via HDMI. Everything works fine, unless I suspend the system and then wake it back up. When that ...
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Super resolution on amd

Greetings ubuntu members. Im back to Ubuntu after many years, 5 of so. I was using windows because of my job position. On windows 10, i haved super resolution for my monitor (scaling) im using 2k ...
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Radeon 4550 video card not detecting second monitor

On Ubuntu 20.04 with KDE installed on top. It's a bit of a complicated setup, so please bear with me. Primary video card: Radeon 5450 --> 1 VGA monitor, 1 DVI monitor (both working perfectly) ...
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Is there a Display Manager for ultra-widescreen monitors in Linux?

Use-Case So in my daily life, I use Ubuntu 20.x for coding, chatting, browsing but also most notably for online calls with screen sharing. So I use an ultrawide monitor and I get annoyed with the ...
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Ubuntu 20.04.3 doesn't recognize display port

when I connect DP to monitor. Ubuntu will not recognize the monitor. but when I use DP to HDMI adaptor and connect to HDMI of monitor it works (see attached picture) I also installed mesa. when I ...
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