[Libreoffice-bugs] [Bug 124660] New: CPU at 100 % with gtk3 back-end after a few idle minutes with at least 2 documents open

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=124660

            Bug ID: 124660
           Summary: CPU at 100 % with gtk3 back-end after a few idle
                    minutes with at least 2 documents open
           Product: LibreOffice
           Version: 6.2.2.2 release
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: tomaspartl at centrum.cz

Description:
When I open at least to Writer documents in Writer and leave LO idle for a few
minutes (10 minutes is definitely enough), the cpu usage goes up to 100% on one
cpu thread.

It doesn't matter if the documents are .odt, .docx, .doc or if they're unsaved
empty new documents. There only need to be at least two of them and you mustn't
touch them at all for some time.

The spell is broken after making a small edit to one of the two documents and
scrolling up or down a little.

I discovered that I could make the bug go away by switching to the gtk2 or the
gen (X11) back-end, so I assume its gtk3 specific. I switched to gtk2 by adding
the line "SAL_USE_VCLPLUGIN DEFAULT=gtk" without the quotes to
.pam_environment.


Steps to Reproduce:
1. Open at least two writer documents of any kind
2. Let them sit idle for 10 minutes.


Actual Results:
The fan starts blowing at full speed and one virtual core maxes out at 100%.

Expected Results:
All CPU cores at idle levels, the fan is quiet.


Reproducible: Always


User Profile Reset: Yes



Additional Info:
Version: 6.2.2.2
Build ID: 2b840030fec2aae0fd2658d8d4f9548af4e3518d
CPU threads: 4; OS: Linux 4.15; UI render: default; VCL: gtk3; 
Locale: en-US (en_US.UTF-8); UI-Language: en-US
Calc: threaded

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