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.

learn more… | top users | synonyms

0
votes
0answers
19 views

Ubuntu 64 bit 16.04 LTS on laptop Hp Pavilion X2 external HDMI monitor stopped working after latest updates

It seems that Ubuntu is really a problem on HP computers. Now, the new problem is that after the last updates of 16.04, the HDMI port stopped working. I tried with a different monitor and the problem ...
0
votes
0answers
27 views

Ultrawide monitor only showing desktop on part of the screen

I'm currently running Ubuntu 16.04 LTS on a MSI Dominator Laptop, and with the laptop screen disabled and only using my external monitor (LG 34UC88 @ 3440x1440 21:9) Ubuntu refuses to display across ...
0
votes
0answers
11 views

Intel NUC with ViewSonic 24" has snowy screen aliasing

I believe what I'm experiencing is "aliasing" of certain colors on my monitor, but I might not be using the best terminology. Here's what's happening: Certain colors, like the default Kubuntu ...
0
votes
0answers
14 views

airodump-ng not working

I am a beginner to Linux. I am having trouble with the command airodump-ng mon0. As soon as I do it I see the error: Interface mon0: ioctl(SIOCGIFINDEX) failed: No such device. I have tried: ...
0
votes
2answers
30 views

How to show size Ram and CPU ussage in Ubuntu?

I am newbie in use Ubuntu so I don't know how to show Ram and CPU usage which is the same in Task Manager on Windows. It can show by command line in Ubuntu or Application to see more.
0
votes
0answers
113 views

Second monitor not working after Xubuntu 16.04 upgrade

I just upgraded from Xubuntu 15.10 to 16.04 via dist-upgrade. After I restarted, the monitor that is connected (via HDMI-to-DVI-cable) to my laptop wasn't recognized anymore. I already restarted two ...
1
vote
1answer
49 views

Built-in laptop monitor is not detected anymore

The problem The built-in monitor of my laptop is not detected and goes blank at the login screen. However an external monitor connected to the VGA port is correctly detected and gets recognized as ...
1
vote
0answers
17 views

Monitor : no image after turning off then on

I would like to use my monitor as display for two computers, so I would like to switch the input as I want beetween the computer 1 and the computer 2. When I switch on the computer 2 everything is ...
0
votes
0answers
18 views

How to install a resource monitor in Xubuntu 16?

I want to install something like this: But I researched and I don't find anything. Thank you.
0
votes
0answers
34 views

Primary screen turns off after disconnecting external monitor

I have a Dell external monitor connected to my ASUS UX305UA laptop. I use HDMI port, which is connected to HDMI-VGA converter, which connects to the monitor. When I turn on my laptop and connect the ...
0
votes
0answers
17 views

How do I fix overscan?

Please don't mark this as duplicate! I have read many similar question but could not find a good answer for my situation. I am running Ubuntu 15.10. I have a Sansui SLED2900, which works fine over ...
-1
votes
0answers
21 views

My Dell monitor is automatically “shutting down” after 15 minutes of working while on Ubuntu, what may be the cause?

This is happening whenever I am using Ubuntu for more than 10 minutes. But the same thing is not happening when I am using Windows on the same PC. Before the monitor screen turns black, there are ...
0
votes
0answers
98 views

Unknown Display on ubuntu 16

Hey I'm having trouble with my display. When I go to System Settings > Display the monitor shows as unknown display. I've googled and tried a couple of solutions they offered and nothing, changed ...
0
votes
0answers
60 views

Ubuntu flickering @ 144hz AMDGPU

I need some help. I've been trying to get 16.04 on my system since the second alpha came out but sadly whenever I try to run it the screens starts flickering like crazy when I start going through ...
0
votes
0answers
17 views

How to completely reset xrandr

Is there any command which completely resets all settings of xrandr? I have checked this and this but the command xrandr -s 0 does not reset brightness.
0
votes
0answers
14 views

Ubuntu 14.04 Can't Connect External Monitor

I install ubuntu 14.04, after that my cursor blinking and sometimes it's gone, so i search how to remove it and i found a solution that offer me to delete the unknown display from my terminal, so i ...
0
votes
0answers
11 views

Triple Monitor Wont´t Work

Triple Monitor Setup https://youtu.be/AaNNW9SfdZY There is a video of my error. Because i have 3 Monitors. A Laptop and 2 Monitors. And with 2 Monitors it works just fine
0
votes
0answers
35 views

mdadm monitoring script after boot

the mdadm monitoring program is not working after boot. When i kill the process afterwards and run mdadm --monitor --scan again, everything is ok and the script runs on failures. Here ist my ...
1
vote
1answer
70 views

How do I set refresh rate on each monitor invidually?

What am I suppose to write to set each monitor on its own Refresh rate? I can write xrandr -s 1920x1080 -r 144 but that does apply on both monitors which makes my 60hz monitor go black.
2
votes
0answers
88 views

Two monitors - primary, secondary?

I use Ubuntu 16.04 LTS and to motherboard (GA-Z170-D3H with Intel HD Graphic 530) I have connected two monitors. First (primary) on DVI and second (secondary) on VGA output. Secondary monitor I can ...
2
votes
0answers
541 views

Dual display not working after 16.04 upgrade

I recently upgraded from 15.10 to 16.04 via dist-upgrade. Immediately afterwards, my second monitor stopped working. I am using an AMD 7850 APU, and both monitors are plugged in to the motherboard - ...
0
votes
1answer
107 views

Xubuntu 16.04 external monitor

Ok, my first question here is simple: I have xubuntu 16.04 LTS on Laptop X86_64. The laptop can handle ubuntu xenial xerus to but I like xubuntu. It works like a CPU because I link It to a big ...
0
votes
0answers
6 views

using CDPR to discover my MACHINE from a router

hey i am using Ubuntu trusty tar, i have installed cdpr on my pc. this helps me track my pc when connected to my network. when i type the command sudo cdpr -d eth0 i can see the router to which i ...
0
votes
0answers
13 views

How to monitor the Drop Box port in my office environment

someone is misusing the drop box in my office. I want to figure it out who is using it and what he does with drop box. Can anyone tell me the process to keep track of the employees on this. As an ...
0
votes
0answers
37 views

How to check ssh tunnel status and create alert

Can anyone please help me to write a shell script checking ssh tunnels status and create alert in case a tunnel dies? Also some log must be created in var/syslog once a tunnel is created or dies. ...
1
vote
0answers
18 views

Monitor CPU and bandwidth usage of cpu and save to csv

I would like to monitor a specific process. I need to know timestamp, CPU usage (%) and Bandwidth (tcp upload and download in % or byte/s) of this process. I have tried something like this: ps -Ao ...
0
votes
0answers
25 views

Ubuntu 14.04 Connect an External Monitor

When i connect my laptop with external monitor, the monitor not detect my laptop display, how to enable it? i once uninstall unknown display at the first i install ubuntu because it makes my cursor ...
1
vote
1answer
65 views

Set “default” monitor

I would like to be able to set my "default" monitor to be my external 25' monitor instead of my laptop one when I have my external monitor connected. Many applications always open on the laptops ...
0
votes
0answers
43 views

Second monitor is detected but doesn't work [ubuntu 15.10]

I just installed ubuntu 15.10 on a HP EliteDesk and one of the monitors doesn't work correctly. Displays recognize both monitors (Hp Z27n and Hp ProDisplay P201) but only the Hp Z27n is working. ...
0
votes
0answers
17 views

Ubunutu 14.04 + Latitude E6420 + U2715H Monitor

I just got the U2715H monitor, I had no problem connecting it to my laptop (Latitude E6420 , Intel HD3000) , it was recognized and I got a cleat picture. The problem starts when I drag a window ...
0
votes
1answer
41 views

Screen resolution is sometimes too narrow on boot, fixed by rebooting

I'm running 64-bit ubuntu 14.04. I'm experiencing a problem that started just a few days ago: every now and then, on reboot, my screen resolution is too narrow, with black unused screen space to the ...
1
vote
1answer
25 views

Programs sometimes open on the wrong monitor

I'm running Ubuntu 14.04LTS 32bit version with 2 screens. Graphic card is the Nvidia Geforce 9500GT. One screen is the main monitor, where the other is connected to my beamer for the home cinema. ...
0
votes
1answer
58 views

how can i reset my display settings through terminal

i am using ubuntu 15.10.I accindently changed the size of the interface to maximun. Now my folders and windows are too large and dont fully fit the screen so i can not revert the effect. Is there any ...
1
vote
0answers
26 views

Can't see login screen

I'm running Ubuntu 15.10. A few days ago the system started to set the monitor in sleep mode during boot up. Because of this I am unable to see the login screen. However, I am able to hear the ...
0
votes
1answer
63 views

How to run in low resolution 640x480

I need to reduce the resolution to 640x480 to connect to my tv that can detect only that resolution.Any idea on how to do it so that my laptop screen resolution doesn't get affected? Ubuntu 14.04 ...
0
votes
0answers
23 views

Ubuntu 15.04 set primary display [duplicate]

I've 2 display: - Laptop's = 1366x768 - External = 1280x1024 When i use both of them, the external one is on left side of my pc, i organize monitor with Ubuntu's setting, and the system move all my ...
0
votes
1answer
19 views

System Monitor with data logging

Is there some application that allows system monitoring with value logging ? Most of system monitor application usually shows current system usage (CPU/RAM/HDD/NET etc) with (sometimes) small history ...
3
votes
2answers
66 views

chrome resolution changes when monitor is turned off

Having an issue with Google Chrome resolution/dpi changing when I turn my monitor off. I'm pretty sure that this is all related to the scaling factor from Universal Access Panel. in which I have large ...
0
votes
0answers
14 views

Notebook Bult-in Monitor Not Recognized After Installing Nvidia Cuda 7.5

I tried to install Cuda 7.5 (that comes together with Nvidia-352 driver) in my clean Ubuntu 14.04 dist, however I keep getting this black screen when the log in page should have been available. I ...
1
vote
0answers
57 views

Forcing 60Hz refresh with 4K monitor

I have a P2415Q Dell and it's been working brilliantly. Then this morning it inexplicably started refreshing at 30Hz and I cannot seem to set it back to 60Hz (there is no option higher than 30Hz in ...
0
votes
0answers
41 views

Ubuntu 14.04, dual-screen, One screen is “fuzzy”

I'm running two identical monitors, one via KVM. The monitors are identical Dell U3014's capable of running at 2560x1600. One is connected directly by a mini-display port cable, the other is connected ...
0
votes
0answers
60 views

Dual monitors not working properly

So I've been using Windows 10 for a while with 3 monitors and I wanted to give Ubuntu a shot, because I heard a lot of positive things about it. Anyway, when I first booted up Ubuntu, all my 3 ...
0
votes
0answers
77 views

DisplayPort adapted to VGA works in GRUB and Windows but not in Ubuntu

I have a Zotac CI320, which has Intel HD Graphics on its Celeron N2930. Up until now, I've been using the HDMI output, which works fine. I'd like to switch to using it with a VGA monitor input, so I ...
0
votes
0answers
24 views

All devices no longer detected

I'm running Ubuntu 14.04 on an Asus ux303 laptop I rebooted and while the desktop loaded just fine, it isn't detecting external monitors or wifi card. Lsusb shows the keyboard and mouse but neither ...
0
votes
1answer
95 views

Help in correcting or bypassing a bug resulting shifted screen in my ubuntu

On Ubuntu 15.10 using an nVidia gtx 960 card, and life was great until nVidia released driver 355. Everything was fine with the 352 series and when I updated to 355 I got the shifted screen bug. As ...
0
votes
0answers
16 views

Running multi monitor set-up breaks Ubuntu

I'm attempting to use dual monitors, running one through the graphics card, and one through onboard, (using nvidia driver). However whenever I set this option from the BIOS, Ubuntu refuses to run ...
19
votes
3answers
2k views

How can I get my laptop's monitor size?

What is the Ubuntu linux command to find laptop monitor size? I want to know in inches if possible. Thanks
0
votes
0answers
31 views

Mouse flickering Ati Radeon 7470 Ubuntu 14.04

I am currently running Ubuntu 14.04, Ati Radeon 7470. Everything works fine except for the mouse flicker ALL the time and if I disconnect and connect a monitor immediately log me off. I have not ...
0
votes
1answer
28 views

Steam with a computer using 2 monitors

I have 2 monitors, and every time that i run a game from steam, it runs in the wrong monitor. Can I tell steam in which of the monitors to use the full screen mode? Thanks
0
votes
0answers
16 views

Monitor no signal after installing kde plasma

I recently decided to install kde plasma on my machine. I did the install, and everything went well. I restarted my computer, and now my montitor say no signal. This is on a laptop, but the actual ...