Public bug reported:
Environment:
Ubuntu 16.04.2 LTS
nvidia-375
I have a laptop screen with resolution 3840x2160 and external display with
resolution 3440x1440.
I am scaling laptop display to resolution 1920x1080 with
command nvidia-settings --attach CurrentMetaMode="DPY-0: nvidia-auto-select
@3440x1440 +1920+0 {ViewPortIn=3440x1440, ViewPortOut=3440x1440+0+0}, DPY-3:
nvidia-auto-select @1920x1080 +0+0 {ViewPortIn=1920x1080,
ViewPortOut=3840x2160+0+0}"
Bug: Display manager is not detecting scaled resolution correctly. Please see
the attachment.
Caused effect: When focus is on laptop display and pressing Alt + Tab the
application switcher is not shown in center of laptop display but partly in
external display.
$ apt-cache policy lightdm
lightdm:
Installed: 1.18.3-0ubuntu1.1
Candidate: 1.18.3-0ubuntu1.1
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "Display manager not detecting scaled resolution"
https://bugs.launchpad.net/bugs/1681040/+attachment/4858025/+files/scaled-laptop-resolution.png
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https://bugs.launchpad.net/bugs/1681040
Title:
Scaled display resolution is not detected correctly in lightdm display
manager
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