[Libreoffice-bugs] [Bug 130401] New: Calc periodically causes high CPU load, even when window is minified

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=130401

            Bug ID: 130401
           Summary: Calc periodically causes high CPU load, even when
                    window is minified
           Product: LibreOffice
           Version: 6.1.5.2 release
          Hardware: Other
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Calc
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: chris at real-aix.de

Description:
Calc periodically causes high CPU load (1 core @100%), even when its window was
minified and there was no user interaction.
Load goes away as soon as document is "Save"d again, even though there were no
changes/edits since last saving.

Steps to Reproduce:
1. Open attached Calc spreadsheet. It's fairly small, 700 rows by 2 columns,
and around 20kBytes.
2.Minify the Calc window
3.Wait indefinitely ;-)
4 . On my machine, an 8 core Intel NUC, eventually the CPU fan revs up, and the
xfce tas monitor indicates a 100% CPU load of one core, caused by LibreOffice,
giving an average CPU load of between 12% and 13%.
5. Restoring the LibreOffice Calc window and hitting the "Save" button makes
the CPU load go away, until the next time this happens. Which may be 30 (or
more) minutes later.

Actual Results:
High CPU load, as shown in attached screenshot.

Expected Results:
If application is idle, like when window is minified and no user interaction
taking place, it should remain at miniscule CPU load.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
OS is Debian stable, fully updated as of today. Synaptic does not indicate any
updatable packages, even after reloading the packages list from the download
sources.

LibreOffice version is as follows:

Version: 6.1.5.2
Build-ID: 1:6.1.5-3+deb10u5
CPU-Threads: 8; BS: Linux 4.19; UI-Render: Standard; VCL: gtk2; 
Gebietsschema: de-CH (de_CH.UTF-8); Calc: group threaded

After restarting LibreOffice in Safe Mode, pretty exactly 30 minutes later the
CPU fan started revving up, with CPU load at 13% average, one core at 100%.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/libreoffice-bugs/attachments/20200203/ff4971df/attachment.htm>