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Bug #1918

Problem with fractional HiDPI scaling in Windows

Added by Cyberhead 4 days ago. Updated about 10 hours ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
Quassel GUI (Qt)
Target version:
-
Start date:
09/09/2025
Due date:
% Done:

0%

Estimated time:
Version:
0.14.0
OS:
Windows

Description

On a Windows 11 system running Quassel Client v0.14.0 at 150% scaling, the UI appears disproportionately oversized compared to all the other programs in the system.

This is a known bug with Qt that can be solved by setting the global environment variable 

QT_SCALE_FACTOR_ROUNDING_POLICY=PassThrough
in system settings, which isn't exceptionally difficult, however, it would make sense to make necessary changes in the source code for convenience reasons.

History

#1 Updated by kojowo8976 about 10 hours ago

Cyberhead wrote:

On a Windows 11 system running Quassel Client v0.14.0 at 150% scaling, the UI appears disproportionately oversized compared to all the other programs in the system https://www.kaisermemberservices.org

This is a known bug with Qt that can be solved by setting the global environment variable [...] in system settings, which isn't exceptionally difficult, however, it would make sense to make necessary changes in the source code for convenience reasons.

This is a known issue with Qt applications on Windows when using fractional HiDPI scaling. A user has reported that on Windows 11 with 150% scaling, Quassel's UI is disproportionately large. The suggested fix is to set the environment variable QT_SCALE_FACTOR_ROUNDING_POLICY=PassThrough, and the user recommends integrating this change into the source code for convenience.

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