Nixpkgs: keepassx-community: Text and images are cut-off

[TomSmeets]

On both the latest nixpkgs-unstable and on master (08639bcd134) the keepassx-community looks very broken. This is probably something to do with Qt, but I only noticed it with this app.

To Reproduce
Steps to reproduce the behavior:

1. start keepassxc

Expected behavior
Readable text and images

Screenshots

Notify maintainers
@jonafato
@turion

Metadata
Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

• system: "x86_64-linux"
• host os: Linux 5.4.58, NixOS, 20.09.git.aa9a4f5f185 (Nightingale)
• multi-user?: yes
• sandbox: no
• version: nix-env (Nix) 2.3.7
• channels(root): "nixos-20.09pre238896.16fc531784a"
• channels(tom): ""
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
  - keepassx-community
# a list of nixos modules affected by the problem
module:

[JJJollyjim]

Works fine for me (master on Arch Linux)

Do you have display scaling, and if so how is it configured?

[JJJollyjim]

(I feel like I've seen similar issues in the past due to display scaling misconfigurations)

[jonafato]

I also can't reproduce (NixOS unstable, GNOME).

[TomSmeets]

Hmm strange, I am not using any display scaling. Currently I am using lightdm + awesome wm on x11.

Using a different theme does not seem to make a difference.

All dialog windows also have the same issue:

Resizing the window has a small effect on how the text is clipped.
Tall:

Less tall:

[TomSmeets]

It looks like some qt issue. However, I cannot reproduce this issue with some other qt apps.

Dolphin emu uses Qt:

[TomSmeets]

So apparently it does have something to do with scaling. (However still not using any display scaling as far as i know)

Setting QT_SCALE_FACTOR_ROUNDING_POLICY=Round as seen in https://github.com/keepassxreboot/keepassxc/issues/5015#issuecomment-658133457 fixes my issue.

QT_SCALE_FACTOR_ROUNDING_POLICY=Round keepassxc

[turion]

That's weird. As far as I can see, nothing in nixpkgs ever sets that variable. So it's maybe an interaction with another QT app you're using?

[turion]

I guess we could wrap keepassxc in such a way that it always has this environment variable set on runtime. But I'd like to see someone else confirm the bug as well before applying such a change.

[turion]

(Either way, congrats on getting keepass usable again!)

[TomSmeets]

Hi @turion,

For now I just apply that hot-fix for myself by setting environment.variables. I agree that we should wait for others to have this same issue before merging any kind fix into nixpkgs.

These are the only QT related variables set before using a fix:

> env | grep '^QT'
QTWEBKIT_PLUGIN_PATH=/home/tom/.nix-profile/lib/mozilla/plugins/:/etc/profiles/per-user/tom/lib/mozilla/plugins/:/nix/var/nix/profiles/default/lib/mozilla/plugins/:/run/current-system/sw/lib/mozilla/plugins/
QT_PLUGIN_PATH=/home/tom/.nix-profile/lib/qt4/plugins:/home/tom/.nix-profile/lib/kde4/plugins:/etc/profiles/per-user/tom/lib/qt4/plugins:/etc/profiles/per-user/tom/lib/kde4/plugins:/nix/var/nix/profiles/default/lib/qt4/plugins:/nix/var/nix/profiles/default/lib/kde4/plugins:/run/current-system/sw/lib/qt4/plugins:/run/current-system/sw/lib/kde4/plugins

They don't seem to be very relevant

[TomSmeets]

This is the closest i got by bisecting:
good: 50c060d13dc55b673435f05119c968720c97b0c5
bad: 67af42e35ff6e233f301bdd26c774cef1c236025

So probably the commit d4c607aa715086f265f7a711c9dcb9e90a063a92 which updates qt5 from 5.12.7 to 5.14.2 broke keepassxc for me.

[TomSmeets]

Indeed reverting that commit, or just specifying Qt 5.12 for keepassxc works fine. See 7ff4990a96146df4abb45d9c6ca6504694cae39e.

[TomSmeets]

This issue appears to be fixed for me in KeePassXC version 2.6.1 :tada:

I'm closing this issue.