Client not aware of hidpi on wayland

richarddodd · January 15, 2021

The client app on Linux displays at standard resolution on Wayland on a HiDPI screen. I think this is because XWayland doesn't handle HiDPI (I could easily be wrong on this). I think fixing this would be hard, and I wouldn't expect anyone to, but I'm posting anyway in case there is an easy way to tell Xwayland to use HiDPI.

dstillman · January 15, 2021

If you want to try to debug this, the current reference here would be Firefox 60 ESR. Whatever worked for that would work for Zotero.

qqbb · January 15, 2021

@richarddodd: You could try using the layout.css.devPixelsPerPx preference for fixing this. See here:
https://fedoramagazine.org/how-to-get-firefox-looking-right-on-a-high-dpi-display-and-fedora/

This is a related discussion about that Firefox setting:
https://forums.zotero.org/discussion/82005/issues-with-ui-on-windows-hidpi-display

vsanchez · October 31, 2021

Hi, the ideal situation is to have zotero running under wayland and not in Xwayland. Both Firefox and thunderbird can do that. In the case of thunderbird the MOZ_ENABLE_WAYLAND=1 must be set. Firefox 93 seems to figure it out by itself. Can this be done with Zotero? (Using MOZ_ENABLE_WAYLAND does not seem to work).

There are issues pasting text from XWayland to Wayland that are giving me trouble also (but that may be the KDE implementation).

ozankiratli · December 25, 2022

Zotero (as of v6.0.18) still runs with `GDK_BACKEND=x11`. This causes blurry scaling in the wayland compositors when scaling is enabled. I tried `MOZ_ENABLE_WAYLAND=1` without success, but I also tried:

> MOZ_ENABLE_WAYLAND=1 GDK_BACKEND=wayland DISPLAY=$WAYLAND_DISPLAY zotero

And I got the following error:
/usr/local/bin/zotero: line 13: 569845 Segmentation fault (core dumped) "$CALLDIR/zotero-bin" -app "$CALLDIR/application.ini" "$@"

For resolving blurry background I tried to play around with multiple parameters on scaling. Such as "GDK_SCALE", "GDK_DPI_SCALE" as well as gnome settings. However, I wasn't successful on this end. If anyone has a solution, I'd like to try it out.