Dtyjlui

I just installed ubuntu 14.04 and the mouse is now flickering on one of my two screens. The other screen doesn't have any flickering. I was previously using ubunutu 13.10 without any issue.

• If I disable the screen that is working properly, the second screen stops flickering and starts to work properly.


• If I disable the screen that is flickering, the other screen continues to work properly.

I already tried the solutions found here:

• Ubuntu Detects 2 monitors when I only have one


• Mouse Flickering/Disappearing


• Mouse cursor flickering and disappearing

Here is what my display settings look like:

I'm using the X.Org X Server - Nouveau display driver from xserver-xorg-video-nouveau (open source) driver. If I try to switch to an proprietary nvidia one, and click the Apply Changes button, it just starts and takes for ever to complete, changes seems to never apply.

Here is what outputs xrandr:

Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192

VGA-1 disconnected (normal left inverted right x axis y axis)

DVI-I-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 521mm x 293mm

   1920x1080      60.0*+

   1680x1050      59.9  

   1280x1024      75.0     60.0  

   1024x768       75.1     60.0  

   800x600        75.0     60.3     56.2  

   640x480        75.0     72.8     66.7     60.0  

   720x400        70.1  

HDMI-1 disconnected (normal left inverted right x axis y axis)

VGA2 disconnected

HDMI2 disconnected

DP1 disconnected

HDMI3 disconnected

HDMI4 connected 1920x1080+1920+0 521mm x 293mm

   1920x1080      60.0*+   50.0     59.9     30.0     25.0     24.0     30.0     24.0  

   1920x1080i     60.1     50.0     60.0  

   1680x1050      59.9  

   1280x1024      75.0     60.0  

   1280x720       60.0     50.0     59.9  

   1440x576i      50.1  

   1024x768       75.1     60.0  

   1440x480i      60.1     60.1  

   800x600        75.0     60.3     56.2  

   720x576        50.0  

   720x480        60.0     59.9  

   640x480        75.0     72.8     66.7     60.0     59.9  

   720x400        70.1  

DP2 disconnected

DP3 disconnected

VIRTUAL1 disconnected

  1920x1080 (0x4b)  148.5MHz

        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock   67.5KHz

        v: height 1080 start 1084 end 1089 total 1125           clock   60.0Hz

  1680x1050 (0xa2)  119.0MHz

        h: width  1680 start 1728 end 1760 total 1840 skew    0 clock   64.7KHz

        v: height 1050 start 1053 end 1059 total 1080           clock   59.9Hz

  1280x1024 (0xa3)  135.0MHz

        h: width  1280 start 1296 end 1440 total 1688 skew    0 clock   80.0KHz

        v: height 1024 start 1025 end 1028 total 1066           clock   75.0Hz

  1280x1024 (0xa4)  108.0MHz

        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock   64.0KHz

        v: height 1024 start 1025 end 1028 total 1066           clock   60.0Hz

  1024x768 (0xa5)   78.8MHz

        h: width  1024 start 1040 end 1136 total 1312 skew    0 clock   60.1KHz

        v: height  768 start  769 end  772 total  800           clock   75.1Hz

  1024x768 (0xa6)   65.0MHz

        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock   48.4KHz

        v: height  768 start  771 end  777 total  806           clock   60.0Hz

  800x600 (0xa7)   49.5MHz

        h: width   800 start  816 end  896 total 1056 skew    0 clock   46.9KHz

        v: height  600 start  601 end  604 total  625           clock   75.0Hz

  800x600 (0xa8)   40.0MHz

        h: width   800 start  840 end  968 total 1056 skew    0 clock   37.9KHz

        v: height  600 start  601 end  605 total  628           clock   60.3Hz

  800x600 (0xa9)   36.0MHz

        h: width   800 start  824 end  896 total 1024 skew    0 clock   35.2KHz

        v: height  600 start  601 end  603 total  625           clock   56.2Hz

  640x480 (0xaa)   31.5MHz

        h: width   640 start  656 end  720 total  840 skew    0 clock   37.5KHz

        v: height  480 start  481 end  484 total  500           clock   75.0Hz

  640x480 (0xab)   31.5MHz

        h: width   640 start  664 end  704 total  832 skew    0 clock   37.9KHz

        v: height  480 start  489 end  491 total  520           clock   72.8Hz

  640x480 (0xac)   30.2MHz

        h: width   640 start  704 end  768 total  864 skew    0 clock   35.0KHz

        v: height  480 start  483 end  486 total  525           clock   66.7Hz

  640x480 (0xad)   25.2MHz

        h: width   640 start  656 end  752 total  800 skew    0 clock   31.5KHz

        v: height  480 start  490 end  492 total  525           clock   60.0Hz

  720x400 (0xae)   28.3MHz

        h: width   720 start  738 end  846 total  900 skew    0 clock   31.5KHz

        v: height  400 start  412 end  414 total  449           clock   70.1Hz

I had the same problem when I connected my second display to the VGA port. Problem solved when I changed to DVI. I found other issue using Display Port with a VGA adapter. The system goes crazy and becomes unable to detect the resolution properly. Quite a mess.

Try connecting your monitor on the VGA port if possible.
I have a laptop with 2 external monitors connected - one on the VGA port and one on the HDMI port. Hardware is NVidia Optimus. With the 2 monitors connected the mouse cursor flickers on the built in display (the HDMI display works fine). If I unplug the HDMI monitor the flickering on the built-in display stops.
This is probably a bug with the open source nvidia drivers. Please tell us more about your hardware.

Go to a terminal and type or copy & paste [ sudo apt-get install linux-source ] -- press enter, it will ask if you really want to install, just say YES.

Then in same terminal type -- [ sudo apt-get remove --purge nvidia-* ] -- OR -- [ sudo apt-get remove nvidia-current ] -- OR -- [ sudo apt-get remove nvidia-current-updates ] -- then shut down and reboot.

After reboot, your system will be using a generic driver, go to Software & updates (additional drivers) and click one of the NVIDIA binary drivers listed, you should have a couple to pick from, either (proprietary,tested) or (proprietary), I would not use the Nouveau display driver, it is a generic driver and does not give full function.

Click on one of the listed drivers and click apply changes in bottom right corner and allow that driver to install, after its done installing, reboot system. If the driver you clicked on works flawlessly your all set to enjoy, if you still have problems you need to compleatly remove that driver using the remove command as per above and try the other driver listed in your (additional drivers) box. The KEY is to completely remove any other driver that is in your system or you will most certainly have problems!

Just so you know, you can copy and paste all my sudo commands, they are correct :-) Do not use the [ or ] when copying or typing they are only for separation. I hope this has helped, so you can ENJOY using LINUX as much as I do.

I had this problem on 14.04 with a similar setup. I also, at some point, had a problem of text editing delay from one of my monitors.

I had two video cards: one with 1 DVI port, and the other with both a VGA and DVI port.

In the end, I determined my problem was that I was mixing video cards: I was using two DVI ports from two different cards. By instead using just one video card -- using the VGA and DVI ports from that one card -- all my problems went away.

Under your green monitor there is a Unknown monitor. Move the green monitor, select the Unknown monitor and disable it.

I don't have the same problem but a similar one.

In my case the display is touchscreen, I solved disabling the touchscreen as input:

1. 
   sudo gedit /usr/share/X11/xorg.conf.d/10-evdev.conf from the terminal


2. Add Option "Ignore" "on" at the end of touchscreen section (inside it)


3. Reboot

Have the exact same issue. Partially solved using solution in this bug report: Parts of the UI randomly flicker when moving the mouse

sudo add-apt-repository ppa:townsend/compiz-nvidia-refresh-test

sudo apt-get update

sudo apt-get dist-upgrade

At least now it doesn't flicker when I move mouse.