https://bugs.kde.org/show_bug.cgi?id=496507

--- Comment #3 from Joern <joern.koer...@gmail.com> ---
Following situation: 
I've two Displays, one Laptop internal 15.6 inch with 3840x2400 and one
external 24 inch with 3840x2160 resolution.
Due to the very different display size the external 24in screen has 130% scale
and the internal at 220% to match window sizes between displays. Mesa IntelĀ®
IrisĀ® Xe Graphics only the Nvidia part is completely disabled via acpi_call.

Now having both displays connected, the internal at 220% scale the external at
130% spectacle crashes with
spectacle
kpipewire_vaapi_logging: VAAPI: Intel iHD driver for Intel(R) Gen Graphics -
24.4.3 () in use for device "/dev/dri/renderD128"
kpipewire_vaapi_logging: VAAPI: entrypoint 6 of profile 14 is not supported by
the device "/dev/dri/renderD128"
kpipewire_vaapi_logging: VAAPI: entrypoint 8 of profile 14 is not supported by
the device "/dev/dri/renderD128"
kpipewire_vaapi_logging: VAAPI: entrypoint 6 of profile 14 is not supported by
the device "/dev/dri/renderD128"
kpipewire_vaapi_logging: VAAPI: entrypoint 8 of profile 14 is not supported by
the device "/dev/dri/renderD128"
terminate called after throwing an instance of 'cv::Exception'
  what():  OpenCV(4.10.0)
/usr/src/debug/opencv/opencv/modules/core/src/matrix.cpp:808: error:
(-215:Assertion failed) 0 <= roi.x && 0 <= roi.width && roi.x + roi.width <=
m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows in
function 'Mat'

KCrash: Application 'spectacle' crashing... crashRecursionCounter = 2


Now when setting the scale factor of the external display to 130% (and only
exactly 130% as I can say so far) spectacle crashes with the above message. Any
other scale factor seems to work.

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