Questions tagged [monitors]

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

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My 3rd monitor not working on Manjaro when i turn on in settings

My manjaro detect my 3rd monitor connected to displaylink but when I turn it on in system settings my monitors reload and in settings my 3rd is still off. How to turn on this monitor? $ xrandr --...
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My monitor resolution resizes when monitor goes to sleep - i3

I'm having a weird issues with monitor resolution on i3. What Happens: I have a shell script i3lock-off that starts turns off my monitors and runs i3-lock. #!/bin/sh revert() { xset dpms 0 0 0 }...
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11 views

How to adjust xrandr for a broken screen?

I have an external monitor which, while shipping it overseas, got a chip in the corner and now approximately the left quarter of the monitor if ****ed (various degenerations in color, a giant crack ...
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1answer
25 views

Determine which tty is in the “foreground” / “currently displayed”?

In linux I can use the key combinations Alt-Ctrl-F1,Alt-Ctrl-F2... to switch to different tty1 as I could use man chvt. using the command tty I also get displayed the teletype/linux virtual console I ...
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15 views

xrandr - Issue when scaling monitor on the left, but works on the right

I have an integrated eDP1 monitor (2560x1440) and an external HDMI1 monitor (1920x1080). If I want my external monitor on the right side, this command works as wanted : xrandr --output HDMI1 --auto -...
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15 views

Getting permanently connected TV that has multiple connections to only become a display device when tuned to the PC connection?

I've got a computer running Void Linux (so runit, not systemd), SDDM and KDE Plasma (wayland). It has two display devices permanently connected (back of PC is not readily accessible), a monitor on ...
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1answer
24 views

How to set a command to switch between two monitors

My (Linux Mint) PC is connected via Display Port and HDMI to a Monitor and a TV. I want to be able to switch between them, so that the other one is disabled. Are there any commands that can perform ...
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10 views

Freeze issue when changing dual monitor settings multiple times

I have a dual monitor setup and whenever I make changes to monitor settings a couple of times, my computer freezes. When I change a monitor setting (like mirror, resolution or even just close/open my ...
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29 views

New LCD screen with random black screen

I bought a new LCD screen and my computer's screen goes black for 1 second randomly while using Linux distributions. I was using dual boot having windows 8.1 and Ubuntu. Windows 8.1 worked without any ...
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14 views

xrandr rotation does not work properly on DisplayLink monitor

I am using a portable monitor ASUS ZenScreen MB16AC. This monitor can be connected directly to USB-C, or, using DisplayLink, to USB-A. With DisplayLink, the xrandr rotation command xrandr --output ...
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1answer
13 views

External monitor works with one user account but not the other

I have an Alienware aw3418dw external monitor and I'm running Pop!_OS 19.04 , along with kde display manager. I have two accounts on this computer, one for personal, one for work. The monitor works ...
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25 views

HP monitor gets Full HD in Windows, does not get Full HD with Ubuntu 18.10

I have a new HP 22es monitor which supports 1920x1080 (Full HD). When I plug it in to a laptop running Ubuntu 18.10 via VGA, it's in 1024x768 resolution. I got dual OS on my computer so I tried on ...
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23 views

Can xrandr/autorandr distinguish different monitor models connected to the same output?

I have a laptop with which I connect to a monitor at home and at work. In both cases I use the same HDMI out for connecting to the monitor. The one at the lab is 1440p/60hz and the one at home is ...
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217 views

Laptop with LinuxMint OS unable to detect external monitor

I had posted this in Superuser forum but did not got any response, so I am posting it here. Laptop: Asus ROG Strix, G531GT-AL041T, G Core i7 9th Gen, with NVIDIA Geforce GTX 1650 graphics card. A ...
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62 views

Overclocking laptop monitors on Linux?

Is it possible to overclock a laptop monitor which uses integrated Intel graphics on Linux? I've seen tutorials on how to overclock laptop monitors, though all of them use Windows exclusive tools. ...
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1answer
39 views

Is there a better way than this to force monitor blank/off?

Intending to switch off the display/monitor/screen instantly (and only be reenabled upon keypress) I resort to this solution: a /bin/blankvt script: #!/bin/sh echo 1 > /sys/devices/pci0000:00/...
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2answers
62 views

Issue disabling internal monitor

I am running Debian 9 with LXDE on a LattePanda and the main monitor is defaulting to the Internal Display that does not exist. I want to disable the internal display so each time it boots up to the ...
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53 views

Can't change resolution or can't detect monitor

The computer is a MSI Gl63 8RD. I installed Debian 9 on it. When I booted it it had a very low resolution. Upon executing xrandr, this outputted: xrandr: Failed to get size of gamma for output ...
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1answer
29 views

Laptop screen is too small - Scaling without changing external monitor's setting

I am running ElementaryOS (though I've been experiencing this same issue with other distros) on a Xiaomi Notebook 13 laptop, which I have connected to an external monitor. The interface size of the ...
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1answer
186 views

How to set bytes of EDID on a i2c device

I have a monitor LG E2251 (monitor details). My computer was connected to the monitor via DVI-I cable; after the power supply broke, the display went black. I rebooted the system and all seemed ok. ...
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2answers
52 views

Differentiate internal and external monitors

I am looking for a consistant way of getting the name of the built-in monitor in a laptop. To be exact, I am looking for the name of the monitor that will be turned off when the lid is closed. I was ...
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31 views

How to xrandr 4k with Intel 3000 HD Sandybridge?

Running the command below, I expect the external monitor resolution to be changed to 4K. Although xrandr states my desired mode as active, it remains 1366x768: xrandr --output DP2 --mode 3840x2160 --...
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788 views

Ubuntu 18.04 intel vga hdmi not listed

I have a Lenovo Y530 laptop running Ubuntu 18.04 with Intel graphics and nvidia. When I use nvidia everything is just fine. I can use external monitor and xrandr detects it. When I use Intel I ...
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2answers
531 views

obtain the manufacturer and product ID and serial number of the display

The goal is to obtain the manufacturer and product ID and the serial number of the display under the Linux platform. I eventually need to get this information in the program in C++. But I also accept ...
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1answer
271 views

Uniquely identify DP monitors for use in xrandr

I have 2 monitors plugged in via DisplayPort*, named DP1 and DP2. I configure them next to each other like this: xrandr --output DP1 --pos 0x0 --output DP2 --pos 3840x0 Problem: Sometimes, they are ...
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1answer
72 views

Laptop monitor as a server's display

I have connected my server through displayport-VGA cabel to my laptop but my Ubuntu 14 on laptop recognizes it as a view destination, not a view source. How can I revert it and get view from a ...
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1answer
133 views

How do I get the current focused monitor?

I'm using i3 as my WM with a Dual-Head setup. I have already mapped some keys to switch between workspaces on one of the monitors (Mod+Keypad 1..8) and I would like to use the same keybindings on both ...
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29 views

Apple 27" Cinema HD Display making Xorg slow to a crawl

I recently came across an Apple 27" Cinema HD Display, which is 2560x1600 and connects through DVI. I have a fairly powerful gaming PC, GTX 770 graphics card, i5-6600k, SSD, and 16 GB RAM. I ...
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1answer
352 views

Linux cannot detect 2560x1440 144z capability of Vega 64 [duplicate]

Using KDE Neon, a Vega 64, and a Pixio px277h, I have tried to manually make xrandr use the setting for 144hz because it does not seem to detect this properly. The monitor has 144hz capability, the ...
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1answer
120 views

Gnome3 can not set energy saving properties

Neither using the Settings application nor the command: gsettings set org.gnome.desktop.session idle-delay 120 Does have any affect on turning the monitor idle.
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1answer
341 views

Why is my linux screen blurry on my monitor but it isn't when running Windows?

I have a linux machine running Centos connected to two ViewSonic monitors. One is 22 inches and the other is 24 inches. I also have a Windows machine connected only to the 24 inch monitor pressing the ...
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0answers
144 views

color filter in linux display stack

is it possible to change the displayed color in a monitor, either in its open-source driver, or other middleware in the display stack of a linux system? i came across this question because i visited ...
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1answer
581 views

Xrandr problem trying to avoid broken display

Days ago I broke my laptop display by accident, the right side of the screen is damage but the most part of the left side is usable. I do some research trying to find a way to modify the dimension of ...
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0answers
324 views

Why does xdpyinfo and xrandr give different measurements?

I'm trying to calculate the size of my 2 screens together. Using xdpyinfo, I see the following: xdpyinfo | grep 'dimensions:' dimensions: 5120x1600 pixels (1355x423 millimeters) However, ...
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121 views

How to stop internal laptop screen from turning off when closing lid?

When closing my laptop, it turns off the internal screen, which moves all windows to the second screen. I realise that I could move all windows to a secondary workspace to not have them overlap the ...
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0answers
17 views

Issue All-In-One Inspiron 2310 Monitor Volume Keys

At the side panel from my all in one monitor, there are 2 keys for raising and lowering volume (see picture). After installing Ubuntu 16.04.03, both keys working proper but after the first system ...
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133 views

xrandr not detecting old monitor

Xrandr, nor any other program, is detecting my second monitor; as in, xrandr acts like the second monitor doesn't even exist when it's connected. I think it could be due to the fact that both the ...
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2answers
2k views

Force monitor detection, low level

My external monitor (dell) is not detected on my Asus Laptop if I switch it on only after I booted the laptop. The case similar to How to make linux detect/re-probe monitors with intel i915 driver?, ...
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1answer
1k views

“Custom” DPI on Linux Mint Mate

So it's known that Mate and Cinnamon desktop environments only allow the options "Normal" and "Double DPI" in user interface scaling, unlike Ubuntu which you can change with a slider. These two ...
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1answer
2k views

How do I use the KDE 5 monitor calibration tool?

I recently replace my laptop monitor and have noticed it's not as crisp as the only one / my external monitors. In KDE5 there is a "System Settings Module" called Gamma that supplies different test ...
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0answers
305 views

Turning off monitor as root, without xset

I have a script in /etc/acpi that runs when I close my laptop's lid. It turns off the internal monitor. It does this by export DISPLAY=:0 sudo -u toothrot xset dpms ...
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1answer
451 views

Can root test whether a monitor is connected?

I use a script in /etc/acpi to turn off the screen (xset dpms force off) when I close my laptop's lid. Now I want it to act differently when an external monitor is connected (set brightness to zero ...
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555 views

Blank screen after sleeping: hotplug event: connector link-state is BAD

In the past my laptop worked well, but for the past months I have had issues with the laptop screen not being able to wake up after certain events. Basically, after I suspend the laptop there is an ...
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0answers
412 views

“xset dpms force off” also logout from desktop

I'm using Arch Linux with Gnome as DE and lightdm as display manager. I have a keyboard shortcut with the xset dpms force off command for turning off the laptop monitor. When I execute this command ...
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0answers
1k views

Ubuntu 16.04 can not recognize HDMI-monitor, but Ubuntu 17.10 can

Currently I am learning how to use Ubuntu, and while I am using Ubuntu 17.10. My HDMI connection to the Acer Monitor works perfectly fine. However, Ubuntu 17.10 has some problems about apt-get ...
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1answer
186 views

Debian monitor out of range after install

I've tried adding nomodeset to the boot options from grub at startup (press "e" etc...) but it doesn't work. I also tried adding vga=795 and although it did work it doesn't get saved plus it's ...
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1answer
143 views

Debian 9: Backlight Flash at Boot

I've just installed a fresh new Debian 9 LXDE into an ACER AMD Notebook and everything seems to be working fine. However, during the boot, there is an annoying Strong Backlight Flash (seems like a ...
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2answers
3k views

Debian 9: Backlight Brightness

I've just installed a fresh new Debian 9 with LXDE into an ACER AMD Notebook and everything seems to be working fine, except for the backlight brightness. During the boot, it happens the following: ...
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1answer
8k views

After upgrading to 18.04 Ubuntu monitor is unknown

Have been running Ubuntu Mate 17.10 and just upgraded to 18.04 LTS. But after upgrading my monitor settings are all wrong and can't set the proper resolution. How can I resolve this?
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1answer
191 views

Gnome - Laptop Monitor Off when Lid Closes?

I'm running Gnome (Wayland) on Arch Linux. I have configured the environment not to go to suspend, etc. when the lid is closed. When I close the lid, the monitor turns off for a second or two (as ...