Main dialog sometimes not shown on Windows

[bllngr]

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Expected behaviour

Clicking the tray icon or selecting "Open main dialog" always shows the main dialog in the respective corner, without exception.

Actual behaviour

On one of my Windows 10 machines, the icon in the Windows task bar appears, but the main dialog is not shown. No matter what I do, I cannot get the main overlay to be shown.

Removing the geometry setting from nextcloud.cfg doesn't help either.

Steps to reproduce

Unfortunately, I have no idea how to reproduce it :(

Client configuration

Client version: 3.1.3

Operating system: Windows 10

OS language: en-US

Installation path of client:

Logs

1. Client logfile:
   https://gist.github.com/bllngr/a2418bc370daeea82d313884f75b3ae6

2. Web server error log:
   Not applicable

3. Server logfile: nextcloud log (data/nextcloud.log):
   Not applicable

[github-actions]

This bug report did not receive an update in the last 4 weeks. Please take a look again and update the issue with new details, otherwise the issue will be automatically closed in 2 weeks. Thank you!

[bllngr]

Well, there hasn't been any release, and the issue continues to persist. @FlexW, is there anything I need to do to not let the issue go stale? Do you need more information? Should I try to find out if older versions work correctly? I'd appreciate some reaction other than a bot telling me my issue is not interesting.

[giantkin]

Ive been watching. I have 2 main pc's , ones working perfectly. the other, the nextcloud client wont start up at all. I dont know if its similiar to this or not. (i dl'ed the latest and tried that to no avail as well.)

[FlexW]

@giantkin If it won't start, than it's likely a different issue.

@bllngr I've added the approved label, then the bot will not close it but without steps to reproduce the issue, it will be difficult to fix it.

[giantkin]

@giantkin If it won't start, than it's likely a different issue.

Unfortunately i know its something else. Probably win10 update. (i have 2 things blocked via update now, printer is another!)

[bllngr]

I debugged the issue and it turns out that the dialog is in fact shown, but for some reason the QML was not rendered. Paired with the fact that Window.qml disables window decorations, this resulted in a completely transparent window with no window borders.

However, since it works as expected with QT_OPENGL=angle, I suspect a graphics driver issue.

For the records, this is with a Radeon R9 380 (VEN_1002, DEV_6938) with the latest supported Radeon driver (21.5.2) on Windows 10.

At work, we switched to ANGLE by default on Windows because it's much less problematic than OpenGL. I suggest you think about that as well.