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Dual screen alignment problems on Ubuntu MATE 18.04 (images provided)


xrandr-mediated correction of VGA overscan on external computer monitorxrandr issue when panning second monitorMATE: Cannot see menu of QT applications (Skype, Virtualbox)xrandr scale 2x2 for multi display (4K HiDPI and Full HD mix) - blurred outputxrandr: display borders are cutoffWhat is Gnome getting set when I add a screen that Awesome is missing?Ubuntu 18.04 Mouse Pointer Blinks and disappears on one screen after setting HiDPI scaling with xrandrResolution and scaling issues on dual monitor with nvidia (one 4k HiDPI, one VGA with converter)






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I have been trying to get two screens with different resolutions to work in the configuration shown in the images below. Plain Ubuntu had no problems making them play well together, yet on my new installation of Ubuntu MATE, I get the following problem.



When the lower-resolution display is set as primary, the higher-resolution display appears to lose real estate.



In particular, even though you can move windows around on the entire screen, edge snapping will force a window into one of the three areas highlighted in the second picture. The rest of the available space goes unused.



Similarly, if you attempt to maximize a window, it will maximize to one of the same areas, as shown in the bottom two shapes.



This behavior can be tuned by scaling the x-axis through xrandr, allowing for more "usable" space, but it never looks quite right, and the scaling parameter has a max limit that prevents me from making it work that way.



If I set the higher-resolution display as primary, there is no such issue.



My machine is a Dell XPS 13 9670 Developer Edition that appears to not have external drivers to install. I'm currently running Ubuntu MATE 18.04. The problem does not exist with the shipped OS (Ubuntu 16.04)



What I mostly want to know is what causes the problem, and why it only happens when the secondary monitor needs to scale the UI up, but not when the secondary monitor needs to scale the UI down.












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    0















    I have been trying to get two screens with different resolutions to work in the configuration shown in the images below. Plain Ubuntu had no problems making them play well together, yet on my new installation of Ubuntu MATE, I get the following problem.



    When the lower-resolution display is set as primary, the higher-resolution display appears to lose real estate.



    In particular, even though you can move windows around on the entire screen, edge snapping will force a window into one of the three areas highlighted in the second picture. The rest of the available space goes unused.



    Similarly, if you attempt to maximize a window, it will maximize to one of the same areas, as shown in the bottom two shapes.



    This behavior can be tuned by scaling the x-axis through xrandr, allowing for more "usable" space, but it never looks quite right, and the scaling parameter has a max limit that prevents me from making it work that way.



    If I set the higher-resolution display as primary, there is no such issue.



    My machine is a Dell XPS 13 9670 Developer Edition that appears to not have external drivers to install. I'm currently running Ubuntu MATE 18.04. The problem does not exist with the shipped OS (Ubuntu 16.04)



    What I mostly want to know is what causes the problem, and why it only happens when the secondary monitor needs to scale the UI up, but not when the secondary monitor needs to scale the UI down.












    share|improve this question









    New contributor



    Guybrush Threepwood is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.
























      0












      0








      0








      I have been trying to get two screens with different resolutions to work in the configuration shown in the images below. Plain Ubuntu had no problems making them play well together, yet on my new installation of Ubuntu MATE, I get the following problem.



      When the lower-resolution display is set as primary, the higher-resolution display appears to lose real estate.



      In particular, even though you can move windows around on the entire screen, edge snapping will force a window into one of the three areas highlighted in the second picture. The rest of the available space goes unused.



      Similarly, if you attempt to maximize a window, it will maximize to one of the same areas, as shown in the bottom two shapes.



      This behavior can be tuned by scaling the x-axis through xrandr, allowing for more "usable" space, but it never looks quite right, and the scaling parameter has a max limit that prevents me from making it work that way.



      If I set the higher-resolution display as primary, there is no such issue.



      My machine is a Dell XPS 13 9670 Developer Edition that appears to not have external drivers to install. I'm currently running Ubuntu MATE 18.04. The problem does not exist with the shipped OS (Ubuntu 16.04)



      What I mostly want to know is what causes the problem, and why it only happens when the secondary monitor needs to scale the UI up, but not when the secondary monitor needs to scale the UI down.












      share|improve this question









      New contributor



      Guybrush Threepwood is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I have been trying to get two screens with different resolutions to work in the configuration shown in the images below. Plain Ubuntu had no problems making them play well together, yet on my new installation of Ubuntu MATE, I get the following problem.



      When the lower-resolution display is set as primary, the higher-resolution display appears to lose real estate.



      In particular, even though you can move windows around on the entire screen, edge snapping will force a window into one of the three areas highlighted in the second picture. The rest of the available space goes unused.



      Similarly, if you attempt to maximize a window, it will maximize to one of the same areas, as shown in the bottom two shapes.



      This behavior can be tuned by scaling the x-axis through xrandr, allowing for more "usable" space, but it never looks quite right, and the scaling parameter has a max limit that prevents me from making it work that way.



      If I set the higher-resolution display as primary, there is no such issue.



      My machine is a Dell XPS 13 9670 Developer Edition that appears to not have external drivers to install. I'm currently running Ubuntu MATE 18.04. The problem does not exist with the shipped OS (Ubuntu 16.04)



      What I mostly want to know is what causes the problem, and why it only happens when the secondary monitor needs to scale the UI up, but not when the secondary monitor needs to scale the UI down.









      ubuntu linux-kernel drivers xrandr mate-desktop






      share|improve this question









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      Guybrush Threepwood is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.










      share|improve this question









      New contributor



      Guybrush Threepwood is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.








      share|improve this question




      share|improve this question








      edited 7 hours ago







      Guybrush Threepwood













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      asked 2 days ago









      Guybrush ThreepwoodGuybrush Threepwood

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