No working API to lock screen orientation

I need to lock my app into portrait mode. But the only Qt API that I can find,
does not work.

On Symbian with Qt >= 4.7.2 the following works:
QWidget::setAttribute(Qt::WA_LockPortraitOrientation)

There is also:
Qt::WA_LockLandscapeOrientation
Qt::WA_AutoOrientation

If I use Qt Creator from MeeGo SDK 1.2 and use the QML/C++ wizard, it will
create code that uses the above API.

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EXACT STEPS LEADING TO PROBLEM:
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1. Call: mainwin->setAttribute(Qt::WA_LockPortraitOrientation)
2. Hold the device in landscape mode

EXPECTED OUTCOME:
The app is displayed in portrait mode, regardless of the devices physical
orientation.

ACTUAL OUTCOME:
The app is displayed in landscape mode

There is related bug reported at https://bugs.meego.com/show_bug.cgi?id=17200

USER IMPACT:
No portrait or landscape only apps

REPRODUCIBILITY:
Always