Does not detect monitor, no required resolution, unknown VGA display in Ubuntu / ~#root -i Does not detect monitor, no required resolution, unknown VGA display in Ubuntu / ~#root -i Does not detect monitor, no required resolution, unknown VGA display in Ubuntu / ~#root -i Does not detect monitor, no required resolution, unknown VGA display in Ubuntu / ~#root -i Does not detect monitor, no required resolution, unknown VGA display in Ubuntu / ~#root -i Does not detect monitor, no required resolution, unknown VGA display in Ubuntu / ~#root -i Does not detect monitor, no required resolution, unknown VGA display in Ubuntu / ~#root -i Does not detect monitor, no required resolution, unknown VGA display in Ubuntu / ~#root -i
  • RU
  • UA
  • EN
  • Create an online store
  • Documentation
  • Blog
    • Unix ОS
    • Php
    • MySQL
    • JavaScript
    • Package Managers
    • Docker
    • Seo
  • Short Links
  • Sign in
  • Create Account
  • Home
  • Unix OS
  • Does not detect monitor, no required resolution, unknown VGA display in Ubuntu

Does not detect monitor, no required resolution, unknown VGA display in Ubuntu

Faced the problem of determining the second monitor connected via VGA. At first, suspicion fell on the drivers, since Ubuntu 18.04 was updated before the reboot. Being engaged in the analysis and witchcraft with xorg.conf achieved nothing. Decided to reinstall the OS, but it did not help. Later I checked the connected monitor to another machine, it became clear that the monitor does not give information about itself. The reasons why, I don't know. Adapters are not used, I tried to change the connection cable, it did not help.

I had to start the "Unknown Display" manually by setting its operation parameters. I remember that it worked with a resolution of 1920x1080 with a frequency of 60. This is quite enough to generate parameters and let the system know how to work with the monitor.

1. Determine the connection of the desired monitor :

in console

xrandr

We see the use (in my case) VGA-1-1

xrandr

2. We take a line with parameters :

cvt 1920 1080 60

parameters (in my case) 1920x1080 60. We need this part, we will use it further.

cvt

3. Apply new parameters :

xrandr --newmode 1920x1080_60.00 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync

xrandr --addmode VGA-1-1 1920x1080_60.00

xrandr --output VGA-1-1 --mode 1920x1080_60.00

1920x1080_60.00 - parameter from screenshot 2.

VGA-1-1 - connection from screen 1.

We observe that in the monitor management settings, the desired resolution has appeared.

Монитор

This method only works within one session. In order for the monitor to have the parameters we need when logging in, we need to set it to autorun.

4. Automation at startup :

Create monitor.sh with parameters from step 3 above and place it anywhere

#\!/bin/sh

xrandr --newmode 1920x1080_60.00 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
xrandr --addmode VGA-1-1 1920x1080_60.00
xrandr --output VGA-1-1 --mode 1920x1080_60.00

To auto-start when you turn it on, you need to go to "Settings" -\u003e "Auto-start applications" and do this

автозапуск

Where sh /home/username/monitor.sh is the launch of the executable.

Source 1 Source 2

30 March 19
11587
2

Comments

root-i

02 April 2020 21:48
Дополню. В моем случае, скорее всего, в мониторе слетела прошивка. Роясь по форумам было упомянуто, что для починки придется выпаивать модуль памяти и прошивать. Прошивку брать или с живого монитора вашей модели, или на сайте производителя, если он предоставляет такое.
3

anonymous

12 June 2020 19:37
Всё четко, спасибо
6

Владимир

28 September 2020 10:44
Использую старый монитор из запасников NEC LCD 1770 NXM драйвера еще в inf и на официальном сайте их уже нет. Смог перевести в разрешение 1280х1024.\

СПАСИБО!
4
Name
E-mail
Rating
Review

Other articles from the category

26 May 2022

Ubuntu black screen after driver installation on Nvidia 630M

Let's try to cure the black screen when booting Ubuntu after installing proprietary nvidia-340 driver on Nvidia 630M laptop.

06 January 2022

USB not working after Ubuntu 18.04 update on laptop

When USB 2.0-3.0 stopped working after updating Ubuntu on a laptop.

18 December 2021

Running Skype (skypeforlinux) in multiple Ubuntu windows

Ability to run Skype in multiple windows. Installed on Ubuntu skypeforlinux run in 2 windows.

23 March 2020

Disabling bluetooth speakers, dos attack on bluetooth in Linux

Let's consider one of the ways to dos-attack on bluetooth through the basic l2ping tools in linux. Let's analyze a simple python script.

30 December 2019

Store e-mail locally, Ubuntu sendmail stub for Php

Consider a script that saves e-mail to a file. Sendmail stub, setup in Ubuntu.

26 June 2019

Ubuntu 18.04 initramfs error

Let's analyze one of the reasons for the initramfs error when starting Linux Ubuntu 18.04. Let's try a system restore. fsck exited with status code 4.

31 March 2019

Npm : Depends node-gyp but won`t install Ubuntu 18.04

Unsatisfied links when installing npm, after installing node.js. Consider an alternative installation option.

29 March 2019

imwheel mouse wheel scroll step in Ubuntu

Adjusting mouse wheel scroll spacing using the imwheel app in Ubuntu

Categories

  • Unix OS
  • Php
  • MySQL
  • JavaScript
  • Package Managers
  • Docker
  • Seo

Latest comments

alex, я вижу 2 причины почему так может быть. Не в...
root-i
04.07.22
Сделал все так как написано в статье, не работает.
alex
04.07.22
Как вариант это может происходить из-за неизвестно...
root-i
21.01.22
Чтобы убрать ошибку Uncaught TypeError: $ is not a...
wlad2.ru
11.01.22

I share information in which I needed help and spent a lot of time figuring it out. If the information helped at least one person, then this site was not created in vain.

Thank you for the continuation of the site:
Contacts

Telegram Viber Mail

Search for articles

  • Sign in
  • Create Account

Powered by chmod -R