2.3.4 Snap has "Windows 95" toolkit appearance instead of Fusion

[elcste]

Since the Snap upgraded to 2.3.4, the toolkit appearance is blocky, like Windows 95, instead of Qt's Fusion Style:

I tried reverting to 2.3.3 in case I was imagining things, and that does have Fusion Style:

I'm using Ubuntu MATE 18.04, which I know sets QT_QPA_PLATFORMTHEME=gtk2, but I tried setting it to gtk3 in my ~/.profile and it didn't make a difference (and 2.3.3 works fine as is...)

---

Debug Info

KeePassXC - Version 2.3.4
Revision: 6fe821c
Distribution: Snap

Libraries:

• Qt 5.5.1
• libgcrypt 1.8.1

Operating system: Ubuntu Core 16
CPU architecture: x86_64
Kernel: linux 4.15.0-33-generic

Enabled extensions:

• Auto-Type
• Browser Integration
• Legacy Browser Integration (KeePassHTTP)
• SSH Agent
• YubiKey

[droidmonkey]

Fun ... This doesn't happen in unity.. I'll play around with it

[elcste]

Let me know if there's some way I can help test!

I did try a new user account, and a second computer with Ubuntu MATE 18.04, and they both show the same thing, including it working fine when reverting to 2.3.3.

FWIW, this was also the first version where I saw a warning about Qt version and virtual keyboard (IIRC) the first time I launched it.

[Zap123]

I can confirm this issue. It happened to me after keepassxc was automatically updated to 2.3.4.
I'm using Ubuntu 18.04.

Gtk-Message: Failed to load module "gail"
Gtk-Message: Failed to load module "atk-bridge"

(keepassxc:7932): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
...
Gtk-Message: Failed to load module "canberra-gtk-module"
Qt: Session management error: None of the authentication protocols specified are supported
/usr/share/libdrm/amdgpu.ids: No such file or directory
QObject::startTimer: Timers cannot have negative intervals

[droidmonkey]

I have wasted a lot of time trying to figure out why snap does "X". I can replicate the issue on my build but cannot fix it. Unfortunately I do not want to keep wasting time on this issue, which I truly believe is a snapd issue.

Sorry for the rant...

[Zap123]

Absolutely no problem! I'll make a thread on the snapcraft forum in case someone there knows if it's a known issue in snapd.
I'm also attaching a screenshot of the warning @elcste was referring to.

[droidmonkey]

That warning was added in 2.3.4 because we were getting a lot of reports of crashes. Another thing that I hate about snaps is that they can only be built on 16.04 baseline which means we are locked in the past

[pachulo]

Hi! I faced this same issue and tried to solve it using the info from here: https://forum.snapcraft.io/t/shipping-later-qt-with-snap/6873

The resulting code is here: pachulo@db38aeb and I've used launchpad to compile the snap using Ubuntu 18.04: https://code.launchpad.net/~pachulo/+snap/keepassxc-snap-pachulo

So far it seems to work OK (both in Ubuntu 16.04 & 18.04): when installing the snap the core18 snap is pulled automatically and no warning is shown, as it is using Qt 5.9.5, and the theme is working as expected.

I wanted to do a pull request but as I only tested this myself and this base: core18 is still not "official", as far as I can tell, I wanted to wait a few days...

[droidmonkey]

[pachulo]

I'm not a real expert, but I mantain the musescore snap and as an active user of Keepassxc I would be happy to help with everything I can to make the snap more stable.

[droidmonkey]

Awesome I got a build running with your changes. If this checks out I'll push to the store today. Hopefully this fixes all the issues!

https://code.launchpad.net/~droidmonkey/+snap/keepassxc

[elcste]

It's fixed it for me. I just ran snap refresh, and it downloaded core18 and updated Keepassxc (new revision, same version number). When I open this, it's using Fusion again.

[droidmonkey]

AWESOME! Thank you so much for the assist @pachulo

[juzzlin]

Sorry to bother, but I'm having this same issue with my snap packaged Qt5 app on Ubuntu 18.10. It works fine on Ubuntu 18.04. What was the issue here?

[droidmonkey]

I ended up using launchpad to build and deploy the snap using Ubuntu 18.04 (Bionic). You have to setup a launchpad project (which is less than straightforward) based on the Git repository you are using. Then you can setup a snap build against that repository.

You can see a working example here: https://code.launchpad.net/~droidmonkey/+snap/keepassxc-develop

And a screengrab of my settings for this thing:

[juzzlin]

Thank you very much for the information! I will try to do the same..