Details
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Bug
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Resolution: Done
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P3: Somewhat important
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5.5.0, 5.6.0 Alpha
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Opensuse 13.2
NVidia Quadro FX 580 GPU
Proprietary nvidia driver 340.65
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f48170b479df359f47af12b03a501d9d0c386e66
Description
Due to QTBUG-48545 I need to evaluate porting an application heavily using multiple (up to four) screens to xinerama.
While this works fine with Qt 4 I encounter problems with Qt 5. Instead of two separate screens only one huge screen is reported.
In QTBUG-48545 you find a test application. Qt 4 correctly reports
4.8.6 screen count 2 root widget for screen 0 QDesktopWidget(0x8e85a78) QDesktopWidget::geometry() QRect(0,0 3840x1080) reverse nr: 0 screenGeometry QRect(0,0 1920x1080) root widget for screen 1 QDesktopWidget(0x8e85a78) QDesktopWidget::geometry() QRect(0,0 3840x1080) reverse nr: 0 screenGeometry QRect(1920,0 1920x1080)
while Qt 5 returns
5.6.0 screen count 1 root widget for screen 0 QDesktopScreenWidget(0x82ba188) QDesktopWidget::geometry() QRect(0,0 3840x1080) reverse nr: 0 screenGeometry QRect(0,0 3840x1080)
qtdiag is confused as well
Screens: 1 # 0 ":0.0" Depth: 24 Primary: yes Geometry: 3840x1080+0+0 Available: 3840x1080+0+0 Physical size: 1026x286 mm Refresh: 60 Hz Physical DPI: 95.0643,95.9161 Logical DPI: 95.0643,95.9161 DevicePixelRatio: 1 Primary orientation: 2 Orientation: 2 Native orientation: 0 OrientationUpdateMask: 0 LibGL Vendor: NVIDIA Corporation Renderer: Quadro FX 580/PCIe/SSE2 Version: 1.4 (2.1.2 NVIDIA 340.65) Shading language: Format: Version: 1.4 Profile: 0 Swap behavior: 0 Buffer size (RGB): 8,8,8
The problem shows up on machines configured with the proprietary nvidia driver. The very same works fine in Virtualbox.
My problem is now that for the given setup Qt 5 fails in multi screen mode with and without enabled xinerama while Qt 4 works fine.
Attachments
Issue Links
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