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Bug#924956: qt3d-opensource-src: Fractional HiDPI scaling causes serious artifacts in some QT applications



Source: qt3d-opensource-src
Severity: important
Tags: newcomer

Dear Maintainer,

QT has had a bug which caused major artifacts in QT applications, for example
Kate, Kwrite, Konsole, and probably many others.  It only is an issue when
non-integer scaling factors for HiDPI are used.

At least for me, this makes Kate very difficult to use.

The bug was fixed on this page:
https://bugreports.qt.io/browse/QTBUG-66036
Comment #6 contains the fix, which is quite small.  You may have to click the
"X older comments" link to get this comment to appear.

It was too late to make it into QT 5.11, sadly, but there is (or was?) talk of
cherry-picking the patch into 5.11:
https://phabricator.kde.org/T9244

If this patch could make it into Buster's QT, that would be fantastic.



-- System Information:
Debian Release: buster/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.19.0-2-amd64 (SMP w/8 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE= (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled


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