[digiKam-users] photo editor messed up on double monitor HiDPI in Kubuntu 19.10, digikam 6.4.0

Gerrit Holl gerrit.holl at gmail.com
Mon Feb 10 23:27:45 GMT 2020


Hi,

I'm using digikam 6.4.0 using the Appimage, running on Kubuntu 19.10.
When I open the photo editor while my external monitor (3840x2160) is
connected to my laptop, it looks totally messed up on either desktop
or laptop screen (see the screenshots or detailed description below).
When the external monitor is not connected, the editor appears
correctly on the laptop screen.  Disabling display scaling does not
change the situation.

Has anyone noticed this problem or a similar issue?  What else could I
look at to diagnose this?

Specifically:

- The menu bar is not shown correctly (misplaced), however, when I
hover over with the mouse it does drop-down to the individual menus as
if it were shown correctly
- Instead of a single display with the photo, I see three narrow
vertical displays with the photo, each with its own copy of the
sidebar
- The vertical tabs are only active / clickable in the leftmost of
those three columns
- When I click in one of the vertical tabs of the leftmost column,
only the rightmost column changes, both image and sidebar
- When I enlarge the photo editor window, the number of columns
increases, at fullscreen I see four column, the second from the left
has active vertical tabs that change only the rightmost column
- The bottom bar (such as for zooming) is repeated twice horizontally,
both appear active but dropdown (dropup) menus only appear on the
right.
- When I move the editor from the large external monitor to the
smaller laptop monitor, the window becomes split horizontally rather
than vertically.
- When I disconnect the external monitor, the edit window shows
correctly on the laptop screen.

I have a dual screen setup with a laptop screen (1920×1080 pixels) and
an external UHD monitor (3840x2140 pixels).  I have a display scaling
of 1.4 applied for the external monitor, but disabling display scaling
does not resolve the problem (see 3rd screenshot).

I have not noticed any other applications with display problems (but I
have only used this setup since a few weeks only).

Any hints?

kind regards,
Gerrit Holl.
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