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원문 게시자: Phuong Dang ,

본문:

There are 3 cause of this issue:

1- Group loop on your connector

2- VGA cable or VGA output port issue

3- VGA chipset issue

But the highest posibble option usually is frist

To fix this issue

1 - Follow this article to break the ground loop on your monitor and laptop connectors

https://mrgnome.wordpress.com/2009/06/12/external-monitor-flicker-laptop-ground-loop-problem-solved/

2- TESTED ON UBUNTU:  If the above solution cant help, try to install TLP and reboot your ubuntu, the noise will be gone. To install TLP, follow this article

http://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-management.html

Good luck

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