Qt applications show empty GUI in WSL2

[nieebel]

Windows Version

Microsoft Windows [Version 10.0.22621.2715]

WSL Version

2.0.9.0

Are you using WSL 1 or WSL 2?

• WSL 2
• WSL 1

Kernel Version

5.15.133.1

Distro Version

Ubuntu 22.04

Other Software

Speedcrunch (sample Qt application)

Repro Steps

sudo apt-get install libfuse2* x11-common x11-apps libx11-xcb1 libasound2 x11-apps libice6 libsm6 libxaw7 libxft2 libxmu6 libxpm4 libxt6 x11-apps xbitmaps build-essential mesa-utils qt5-default
sudo apt-get install speedcrunch
speedcrunch

Expected Behavior

A GUI with a calculator

Actual Behavior

A GUI with a black or empty screen

Diagnostic Logs

No response

[github-actions]

Hi I'm an AI powered bot that finds similar issues based off the issue title.

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

Open similar issues:

• Launching gui app from Windows does not work the same way as from a WSL terminal. (#10009), similarity score: 0.76

Closed similar issues:

• Can't run Qt based apps on wsl (#3730), similarity score: 0.84
• Not able to lauch gui apps on wsl2 (#4147), similarity score: 0.80
• Linux GUI was not working in wsl2 (#7250), similarity score: 0.78
• Can't open GUI apps After WSL 2 Conversion (#4124), similarity score: 0.78
• Can't open self written GUI apps WSL2 (Ubuntu) (#10034), similarity score: 0.76
• unable to launch gui apps outside of wsl (#9042), similarity score: 0.76
• No GUI or icon in WSL under Windows 10 (#4880), similarity score: 0.75
• wsl does not start any graphical app (#9567), similarity score: 0.75

Note: You can give me feedback by thumbs upping or thumbs downing this comment.

[hideyukn88]

@nieebel, thanks for reporting the issue, as I tried at my end, it does not exhibit the issue. It is possible this depends on GPU driver you have installed in Windows host, would you please share the driver information from Windows device manager, thanks!

[nieebel]

Thanks for checking, this is my GPU and driver version:

Intel UHD Graphics 620 (i7-8665U, Dell Latitude 7400)
20/01/2022
30.0.101.1338

[hideyukn88]

@nieebel, thanks, would you also try export LIBGL_ALWAYS_SOFTWARE=1, then launch app if this shows the GUI, thanks!

[nieebel]

@hideyukn88 didn't help :(
Any other idea?

[nieebel]

Sorry, I just realized it was always working but speedcrunch didn't show the keyboard in the first startup -.-
There is another Qt GUI application which does not work, but this could also be a bug in the application: https://help.nextcloud.com/t/desktop-client-empty-gui-in-wsl2/175112

Anyway, I will close this ticket.