[Buildroot] [Bug 14071] New: -platform linuxfb:fb=/dev/fb0:rotation=180 does not rotate a Qt5 application

[bugzilla@busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=14071

            Bug ID: 14071
           Summary: -platform linuxfb:fb=/dev/fb0:rotation=180 does not
                    rotate a Qt5 application
           Product: buildroot
           Version: 2021.05
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Other
          Assignee: unassigned@buildroot.uclibc.org
          Reporter: sbartolett@thorlabs.com
                CC: buildroot@uclibc.org
  Target Milestone: ---

I am trying to rotate a Qt5 application 180 degrees using the linuxfb
rotation=180 setting but it seems to be ignored.  I've tried other linuxfb
options such as offset but these also seems to be ignored.  Are these options
supported under buildroot?

I've tried:

./test -platform linuxfb:fb=/dev/fb0:rotation=180
./test -platform linuxfb:rotation=180
./test -platform linuxfb:fb=/dev/fb0:rotation:180

I've also tried setting teh environment varaible QT_QPA_PLATFORM.  But in all
case the application to runs normally (not rotated).

I did find this patch:
https://borkedlabs.com/blog/2015/06-01-qt5-linuxfb-rotation-for-lcds/, but it
is from 2015 so I would assunme this issue would have been fixed by now.

--- Comment #1 from Thomas Petazzoni <thomas.petazzoni@bootlin.com> ---
*** Bug 14066 has been marked as a duplicate of this bug. ***

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