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Questions tagged [display]

Questions regarding the display(s) attached to a unix or linux machine, the DISPLAY environment setting, the ImageMagick display tool or (along with X11 tag) remote display redirection

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1answer
15 views

How to distinguish attached monitors?

To automatically change the display layout of the Xserver when I dock my laptop I need not only detect that this event actually happened but also which monitors are connected to be able to distinguish ...
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0answers
21 views

Display blacking out on boot (Macbook Linux)

(Please note that I am breaking this out as a separate question from this one I asked earlier: How exactly do the Linux display device files work?) I have a Linux From Scratch system that I've built (...
2
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0answers
83 views

How exactly do the Linux display device files work? [on hold]

I don't really understand how the Linux display device files work and interact together. What files in the /dev tree need to go where and where do they need to connect/point to, in order to show a ...
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1answer
39 views

Kali linux installation graphics messed up [duplicate]

I made a Kali linux installation medium using rufus, and live works only in forensic mode. And all other modes like install isn't working. It has to be UEFI: And his happens. I tried DD and iso, ...
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0answers
9 views

Run script when monitor enter power save or wake up [closed]

I have been googling for a while already looking for a way to run bash script when monitor is going into power save mode. I found only on askubuntu a dirty script that query xset in loop and check for ...
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0answers
22 views

Display keeps blacking out (i915)

I am experiencing a very annoying display problem on my laptop, which I am struggling to troubleshoot: The display is frequently blacking out. When it does this, the system keeps running in the ...
1
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0answers
20 views

Reduce used display size for both X server and console

I have the situation that I have a LCD display that I would like to use but I want to have a "black unused frame" around the displayed content. Is there a kernel setting which controls the used ...
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0answers
26 views

VGA to HDMI converter presenting as very small screen

I just bought a vga to hdmi converter to use for a slideshow. It presents as a 4:3 device with a resolution of 1024 by 768. I'm using a thinkpad w540 with antergos linux. Is there any way I could lie ...
1
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0answers
37 views

How to enable the full screen mode for Kali Linux on Hyper-V virtual machine

I have successfully installed Kali Linux on Hyper-V. The problem is that the OS doesn't take the whole screen. It takes only part of it. How to make Kali Linux run on full screen (physical)?
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0answers
17 views

Display freezes when HDMI is not connected

I have an Acer Aspire E 15 on which I installed Archlinux with XFCE as my DE. However, I find that the laptop's display completely freezes as soon as I disconnect the HDMI cable to my external monitor....
1
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1answer
85 views

Deepin Linux: Onboard HDMI not working (shows only on boot/shutdown)

I have a Dell XPS desktop with Deepin Linux where the onboard HDMI doesn't work (no signal). Based on the Ubuntu collected from Ubuntu, Deeping is not identifying some HDMI ports (uname/xrandr/lshw ...
1
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1answer
22 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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0answers
16 views

Font not displayed correctly (mostly on Qt program), underline '_' not seen

I use Dejavu Sans Mono for default code font. I often find underline '_' unseen because bottom pixel is not displayed. Eg. KWrite (Kwrite's font setting is: "Monospace", normal, size 10) If I ...
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4answers
76 views

Run X program in another user's display

Running Ubuntu 16.04 in host, I have the following setup: a user1, who performed a GUI login in host; a user2, who is a sudoer and is logged in only through a text ssh connection (ssh user2@host). I ...
0
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1answer
12 views

Display colours look dry and less vibrant with default applications.

My display looks very drab and less vibrant when images are viewed with the default applications (Image Viewer, in this case). And even in Chrome (which is also my default browser), the colours look ...
1
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1answer
33 views

Thinkpad x61 with Mint 19.1 connecting to TV but NOT to projector

I have a Thinkpad x61 that I plan on using to teach at university. It comes with a tablet screen and stylus. When using Xournal, it allows me to write notes and create narrations very effectively! ...
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0answers
85 views

Wrong screen resolution sometimes after sleep, with Ubuntu

After my Lenovo T480s connected to a Benq 4k display wakes from sleep, my resolution goes to 1080p, unplugging and plugging the display back in resets it to 4k. (This doesn't always happen, but I find ...
0
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1answer
44 views

No signal on monitor if no device is attached to HDMI port during boot

I have a very strange issue. At the moment in which udev is loaded (during boot), the video signal is lost on the display if the HDMI port has no screen attached to it (the display is connected to a ...
1
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2answers
47 views

Linux Service Cannot Open Display

On my Odroid running Ubuntu 16.04.3 LTS I have a python2 program that interacts with a display device (projector). When I run this program from the command line: python ~/imgProc/torcam.py ...
0
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1answer
13 views

GUI application won't start in Konsole, opened in x2go session

I'm using x2go server on my work laptop and pyhoca-gui on my home laptop. I open an LXDE session and start Konsole. Every app I try to run in Konsole fails to open the display. How do I fix this?
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0answers
48 views

USB-C AlternateMode not working even after upgrading kernel to 4.19

I have been trying to use an external display with my hp-envy-13 running ubuntu 18.04 for a while now. I was expecting that kernel 4.19 would have the support but it still does not seem to work. The ...
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0answers
188 views

Linux Mint 19 Cinnamon Desktop scaling feature missing

I need to set Desktop scaling, but this feature is missing in my menu. Is anything missing in the system? Everything I can find online says to go to Settings -> General -> Desktop Scaling But no ...
1
vote
1answer
136 views

USB-C to DisplayPort Adaper still not recognised in Linux kernel 4.19

I use Ubuntu 18.04 and upgraded to Linux kernel mainline 4.19.2 with ukuu, which purportedly supports DisplayPort alternate mode for USB-C. alex@gta-65:~$ uname -a Linux gta-65 4.19.2-041902-generic #...
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1answer
59 views

How can I prevent a desktop monitor screen from going to sleep when inactive on CentOs 7 Linux?

How can I stop my monitor screen from going to sleep on CentOS 7 Desktop (X Windows) due to inactivity?
1
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1answer
58 views

How do I detect when a monitor is plugged in or unplugged without acpi, xrandr, /sys and udev?

I've read the answers to this question but I don't have ACPI, the /sys/class/drm/card0-socket/status method does not work and the xrandr method chokes my CPU. udevadm monitor shows nothing when (un)...
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0answers
42 views

How to vary the amount of red or blue light with xcalib?

xcalib commands follow this structure xcalib -color <gamma> <brightness-percent> <contrast-percent> I then issue two commands as one to try and adjust the amount of red on my ...
1
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0answers
28 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 ...
1
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0answers
96 views

Am I using Nvidia driver?

I am using Debian Stretch (9.5) and sudo lspci -nn | egrep -i "3d|display|vga" returns: 00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 520 [8086:1916] (rev 07) 06:00.0 3D ...
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1answer
114 views

Xvfb: export display permanently

I have recently set up Xvfb on Centos 7 machine. It is working absolutely fine. Only problem is that if I quit putty session (remote access) it would keep running Xvfb in background but display ...
0
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0answers
28 views

Check the times of the DPMS power-saving setting

I'm using i3-gaps and a problem that i have when watching videos is that the screen gets powered off after i set the time using DPMS on my shell rc. So, to solve the problem, i had the idea to make a ...
2
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1answer
53 views

Reduce size of my screen with a command line

I am running a Debian stable with Cinnamon graphical interface 3.6.7 and my computer is connected to a multimedia projector. I havea an Intel Graphic card. The projected image is too big and I can't ...
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0answers
46 views

How to remove *all* green and blue light: xcalib and redshift seem not to?

I'd like to have a redshift-style effect on my laptop screen but where I truly remove all green and blue light, leaving only red. I've experimented with redshift, which doesn't seem to take it all ...
2
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0answers
73 views

How to get a black screen from boot, until a script ask to turn on display?

For a "Smart Mirror" I made, I'd like to hide the boot process because this is ugly. I use Debian and XFCE (I can use another DM in place of XFCE). Ideally the screen remain blank until the apps ...
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2answers
75 views

Can the screen size of an X11 window be set higher than the monitor's resolution and the view panned around the larger display?

My laptop has screen resolution of 1366x768 but I want to create an X display with a higher resolution and scroll around it. It was possible in Windows where the drivers and the graphics card allowed ...
0
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1answer
39 views

Is there a command to show whether my laptop graphics card (Intel) can support multiple monitors?

I'm wondering if there is a way to show whether my laptop can support two monitors. I have a laptop with Intel 2nd Generation Core Processor Family Integrated Graphics Controller running on a Lenovo ...
6
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1answer
189 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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3answers
189 views

Cannot open xterm as another user : Xt error: Can't open display: :0

I'm trying to open an xterm as another user : $ su - sebastien $ xterm No protocol specified xterm: Xt error: Can't open display: :0 $ exit $ sudo su - sebastien $ xterm No protocol specified xterm:...
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0answers
24 views

startx turns LCD off [closed]

I have written a driver for linux to communicate with /dev/fb0. When system boots, The LCD turns on and displays random colors, but when startx runs (that I expect desktop environment to be shown), ...
2
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0answers
72 views

Timeout to keep or reset settings when configuring displays

I'm using Ubuntu 18.04 on my Lenovo W540, and I want to connect three external displays to it through the "Ultra Dock" docking station, and not use the build-in display. According to the manual one ...
1
vote
1answer
158 views

mapping linux /dev/fb0 to DDR for displaying

I want to write a linux driver which maps my specified memory address space to /dev/fb0. the driver should be specified by what part of linux? drm or frame buffer or server X or somthing else? Which ...
0
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0answers
11 views

Why does the monitor render lesser pixels horizontally than the mode specified?

I have already set a resolution of 1366x768 and it is obvious, as xrandr tool shows the following output: Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192 eDP-1 connected primary ...
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2answers
85 views

What does “DP” device stand for?

I'm trying to list the connected monitors using xrandr that is returning the following information: Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192 eDP-1 connected primary ...
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0answers
62 views

Display Settings won't save: XRandR2 problem

I'm running SparkyLinux v5 Nibiru (Gameover Edition) on a Toshiba Laptop I attached the HDMI port to an Insignia television. When I tried to modify the settings, it gave me the following error: ...
3
votes
1answer
33 views

bios, bootloader, kernel startup & screen driver

I'm trying to setup as touchscreen for a raspberry pi. I'm not posting on rpi forum because I have a more broadly question about linux. Let's explain. My screen only displayed a white screen when ...
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0answers
72 views

Stretch vmbox ubuntu window across two monitors

I have two 1920x1080 resolution external monitors that I attach to my laptop. I am running VirtualBox 5.2.18 with a guest Ubuntu Bionic Beaver 18.04 and a Gnome 3.28.2 desktop. I would like to ...
2
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2answers
234 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?, ...
2
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1answer
79 views

Google Chrome flickers on Cinnamon, but not on Xfce

I am experiencing some flickering problems with Google Chrome (and Chromium, but not on Firefox) on certain websites. The thing is that the flickering manifests only on Cinnamon desktop environment, ...
5
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1answer
68 views

Due to a broken monitor, I need move my screen to the left

A fraction of the right side of my laptop screen is broken, in order to use only the good part the resolution needs to be about 1280x1024, aligned to the left. A simple xrandr -s 1274x1080 will get ...
1
vote
1answer
70 views

HDMI output broken after Antergos install

After installing Antergos with KDE everything is working fine (as far as I can tell) except my HDMI monitor doesn't work. Instead of rendering anything properly it displays whatever the first image ...
0
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0answers
161 views

Linux Mint 18.3 upgraded to 19 - Screen now distorts with open-vm-tools-desktop

Except this singular issue, everything works wonderfully. I already tried apt-get purge open-vm-tools open-vm-tools-desktop but it didn't help. This is what I'm seeing after upgrading. The Y ...