On 12/26/2025 4:08 PM, Jürgen Spitzmüller wrote:
Am Freitag, dem 26.12.2025 um 15:09 +0300 schrieb Baris Erkus:
This is exactly what was happening in my case. I was using a theme
where the OS (Windows 10) background picture and colors change
automatically every 3 hrs. Initially, I could not figure out that the
freeze+memory leak is caused by the MS Windows background and color
changes. Then, just by chance, I was able reproduce the leak, when I
change the MS Windows theme color manually. I think you can also re-
generate it easily: Open LyX. Go to Windows settings. Go to Themes.
Change the color of the theme. Observe LyX and memory usage from Task
Manager.
This probably happens in the wake of the QEvent::ThemeChange signal.
I cannot test myself (not having windows), but reading a bit on it
suggests that there could be memory leaks on Windows if QPalette's are
not properly managed/deleted.
It also suggests the attached. I really do not fully understand this
(and the most elaborate information I got was AI generated), but it
might be worth testing whether this helps.
Another possibility is that the leak happens in refillToolbars().
In any case, Baris, you could check whether the hypothesis
(QEvent::ThemeChange being the cause) is true by setting Tools >
Preferences > User Interface > Color Scheme from "System Default" to
either "Dark Mode" or "Light Mode". This will cause the dignal to be
ignored.
2.5.0 RC2: Indeed. When the color scheme is not selected as System
Default in LyX, no leak occurs and vice versa.
2.4.4: The default LyX color scheme is always attached to the Windows
color I guess. So the leak occurs always.
Note: The difference between 2.5.0 RC2 and 2.4.4 is that the on 2.5.0
RC2, the leak stops after some time (10-20 secs) after dumping around
1GB memory. In 2.4.4, however, memory dump never stops. I had to kill
the process as the memory dump went upto 6GB in the tests...
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