Hi, Thanks for the quick reply. I plugged in monitor on HDMI mode it's working, but I connected different monitor via VGA mode or Display port mode, it is not detecting the monitor. I can't able to find any driver for related for this issue. I'm using dual boot with windows 10, it it any problem with this. This is the output of xrandr > xrandragain.txt
------------------------------------------------------------- `Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767 eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 340mm x 190mm 1920x1080 60.01*+ 59.93 47.10 1680x1050 59.95 59.88 1600x1024 60.17 1400x1050 59.98 1600x900 60.00 59.95 59.82 1280x1024 60.02 1440x900 59.89 1400x900 59.96 59.88 1280x960 60.00 1368x768 60.00 59.88 59.85 1360x768 59.80 59.96 1280x800 59.81 59.91 1152x864 60.00 1280x720 59.86 60.00 59.74 1024x768 60.00 1024x576 60.00 59.90 59.82 960x540 60.00 59.63 59.82 800x600 60.32 56.25 864x486 60.00 59.92 59.57 640x480 59.94 720x405 59.51 60.00 58.99 640x360 59.84 59.32 60.00 DP1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis) `-------------------------------------------- -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1780439 Title: Dual Monitor not detect on VGA To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1780439/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp