Bug 463259

Summary: kwin_wayland generating lots of "precision lost! floating value sent to X" error messages in system journal that aren't actually errors
Product: [Plasma] kwin Reporter: Jin Liu <ad.liu.jin>
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED FIXED    
Severity: minor CC: nate
Priority: NOR    
Version First Reported In: 5.26.4   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: https://invent.kde.org/plasma/kwin/commit/6a1552efb6249ff472990f784e7ef9bb16975fe4 Version Fixed/Implemented In: 5.27
Sentry Crash Report:

Description Jin Liu 2022-12-20 06:56:59 UTC 
SUMMARY
There are huge amount of kwin_wayland error messages in system journal, like "kwin_wayland[1025]: kwin_core: precision lost! floating value sent to X 72.5". This makes it difficult to see "real" error messages produced by other apps.

As kwin_wayland seems to work alright, I guess either this error message can be removed, or at least it can be INFO instead of ERROR.

STEPS TO REPRODUCE
1. Use wayland session.
2. Set global zoom to 250%.
3. journalctl -p3

OBSERVED RESULT
lots of "kwin_core: precision lost! floating value sent to X" error messages

EXPECTED RESULT
no such messages

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.26.4
KDE Frameworks Version: 5.101.0
Qt Version: 5.15.7
Comment 1 Bug Janitor Service 2023-01-05 21:03:38 UTC 
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/3398
Comment 2 Nate Graham 2023-01-05 23:44:53 UTC 
Git commit 6a1552efb6249ff472990f784e7ef9bb16975fe4 by Nate Graham.
Committed on 05/01/2023 at 20:59.
Pushed by davidedmundson into branch 'master'.

utils/xcbutils: reduce severity of "precision lost" message a debug

Right now this is marked as critical, but it's not a critical error.
Make it a debug to avoid spamming logs with not-very-actionable
information.
FIXED-IN: 5.27

M  +1    -1    src/utils/xcbutils.cpp

https://invent.kde.org/plasma/kwin/commit/6a1552efb6249ff472990f784e7ef9bb16975fe4