I am using Ubuntu 16.04LTS and had a similar behavior. I have External Dell monitor and whenever I was visiting sites that has flash, or moving the windows my monitor was flickering like crazy. Setting the refresh rate to 60Hz made everything fine.
xrandr -s 1920x1080 -r 60.00 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/349943 Title: Screen blinks randomly on external monitor Status in xorg package in Ubuntu: Won't Fix Bug description: Hardware: Asus F8Va laptop (Core 2 Duo P8600, ATI HD3650, 1440x900) OS: Ubuntu 9.04 beta x64 (Wubi installation inside Windows Vista Home Premium x64 SP1) External monitor (Samsung SyncMaster 2493HM, 1920x1200), connected via HDMI, blinks several times a minute, randomly. When there is no user activity, it doesn't seem to blink however. By "blinking" I mean, the monitor goes off and then on, like it usually does when it changes resolution, only resolution doesn't change. Also, when I move windows around, thin horizontal stripes flash in fraction of second from time to time (only on external monitor). Screen configuration: Samsung 24": On Resolution: 1920x1200 Refresh rate: 60 Hz Rotation: Normal Laptop 14": On Resolution: 1440x900 Refresh rate: 67 Hz Rotation: Normal Mirror screens: unchecked Relative position of screens (physical and in Display Preferences) laptop screen below the external screen, centred. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/349943/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
