I'm getting many issues after upgrade to 16.04 in my Dell 15R 5537. Today I was unable to watch movies as I used to do with 15.10 in my Sony 42' TV with resolution of 1290x1080 using HDMI cable.
Now as soon as I move to the external display the tv starts to blink. :(
I tried to lower the tv resolution to 1280x720. It worked only when both displays are active. When I set the mode where only the tv is active it also blinks.
Another way to make the tv stop to blink was selecting the mirror mode.
lspci | grep VGA :
00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09)
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Venus PRO [Radeon HD 8850M / R9 M265X] (rev ff)
xrandr -q
Screen 0: minimum 8 x 8, current 1366 x 768, maximum 32767 x 32767
eDP1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
1366x768 60.04*+ 40.05
1360x768 59.80 59.96
1280x720 60.00
1024x768 60.00
1024x576 60.00
960x540 60.00
800x600 60.32 56.25
864x486 60.00
640x480 59.94
720x405 60.00
680x384 60.00
640x360 60.00
DP1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected (normal left inverted right x axis y axis)
1920x1080 60.00 + 50.00 59.94 30.00 24.00 29.97 23.98
1920x1080i 60.00 50.00 59.94
1280x1024 60.02
1280x720 60.00 50.00 30.00 59.94 29.97 24.00 23.98
1024x768 60.00
800x600 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 60.00 59.94
could someone give a clue what is going on?
thanks
xrandr -q
?