[root@Sailfish ~]# test_hwcomposer
virtual bool V4l2Device::activate(): /dev/v4l-subdev2 5
virtual bool V4l2Device::activate(): /dev/v4l-subdev0 1
virtual bool V4l2Device::activate(): /dev/video4 2
virtual bool V4l2Device::activate(): /dev/v4l-subdev1 3
virtual bool V4l2Device::activate(): /dev/video5 4
virtual bool V4l2Device::activate(): /dev/v4l-subdev4 8
virtual bool V4l2Device::activate(): /dev/video8 10
virtual bool V4l2Device::activate(): /dev/v4l-subdev5 11
virtual bool V4l2Device::activate(): /dev/video9 12
virtual bool V4l2Device::activate(): /dev/video10 13
virtual bool V4l2Device::activate(): /dev/v4l-subdev6 14
virtual bool V4l2Device::activate(): /dev/v4l-subdev7 15
width: 1024 height: 600
 (A)   (allocateBuffers) m_bufferCount 4 >>
 (A)   (allocateBuffers) m_bufFormat 1 >>
 (A)   (allocateBuffers) m_width 1024 >>
 (A)   (allocateBuffers) m_height 600 >>
 (A)   (allocateBuffers) m_usage 7682 >>
buffer 0 is at 0x1241d0 (native 0x1241d4),err=Success, handle=0x124270 stride=1024
 (A)   (allocateBuffers) m_bufferCount 4 >>
 (A)   (allocateBuffers) m_bufFormat 1 >>
 (A)   (allocateBuffers) m_width 1024 >>
 (A)   (allocateBuffers) m_height 600 >>
 (A)   (allocateBuffers) m_usage 7682 >>
buffer 1 is at 0x1242c8 (native 0x1242cc),err=Success, handle=0x124348 stride=1024
 (A)   (allocateBuffers) m_bufferCount 4 >>
 (A)   (allocateBuffers) m_bufFormat 1 >>
 (A)   (allocateBuffers) m_width 1024 >>
 (A)   (allocateBuffers) m_height 600 >>
 (A)   (allocateBuffers) m_usage 7682 >>
buffer 2 is at 0x1243a0 (native 0x1243a4),err=Success, handle=0x124420 stride=1024
 (A)   (allocateBuffers) m_bufferCount 4 >>
 (A)   (allocateBuffers) m_bufFormat 1 >>
 (A)   (allocateBuffers) m_width 1024 >>
 (A)   (allocateBuffers) m_height 600 >>
 (A)   (allocateBuffers) m_usage 7682 >>
buffer 3 is at 0x124480 (native 0x124484),err=Cannot allocate memory, handle=(nil) stride=0
WARNING: void HWComposerNativeWindow::allocateBuffers(): allocated only 3 buffers out of 4
OpenGL ES 2.0 (OpenGL ES 2.0)
^C^C
[root@Sailfish ~]# /usr/lib/qt5/bin/qmlscene -platform hwcomposer main.qml
EGLFS: Screen Info
 - Physical size: QSizeF(154, 90)
 - Screen size: QSize(1024, 600)
 - Screen depth: 32
== hwcomposer module ==
 * Address: 0xb3c8b004
 * Module API Version: 1
 * HAL API Version: 100
 * Identifier: hwcomposer
 * Name: SAMSUNG_SLSI slsiap hwcomposer module
 * Author: swpark@nexell.co.kr
== hwcomposer module ==
virtual bool V4l2Device::activate(): /dev/v4l-subdev2 5
virtual bool V4l2Device::activate(): /dev/v4l-subdev0 1
virtual bool V4l2Device::activate(): /dev/video4 2
virtual bool V4l2Device::activate(): /dev/v4l-subdev1 3
virtual bool V4l2Device::activate(): /dev/video5 4
virtual bool V4l2Device::activate(): /dev/v4l-subdev4 8
virtual bool V4l2Device::activate(): /dev/video8 10
virtual bool V4l2Device::activate(): /dev/v4l-subdev5 11
virtual bool V4l2Device::activate(): /dev/video9 12
virtual bool V4l2Device::activate(): /dev/video10 13
virtual bool V4l2Device::activate(): /dev/v4l-subdev6 14
virtual bool V4l2Device::activate(): /dev/v4l-subdev7 15
== hwcomposer device ==
 * Version: 1010001 (interpreted as 1010001)
 * Module: 0xb3c8b004
== hwcomposer device ==
QEglScreen 0x1f07af0

QEglWindow 0x1fcf3b0: 0x1fcee28 0x0

 (A)   (allocateBuffers) m_bufferCount 4 >>
 (A)   (allocateBuffers) m_bufFormat 1 >>
 (A)   (allocateBuffers) m_width 1024 >>
 (A)   (allocateBuffers) m_height 600 >>
 (A)   (allocateBuffers) m_usage 7682 >>
buffer 0 is at 0xb2602c60 (native 0xb2602c64),err=Invalid argument, handle=(nil) stride=0
WARNING: void HWComposerNativeWindow::allocateBuffers(): allocated only 0 buffers out of 4
qmlscene: hwcomposer_window.cpp:204: virtual int HWComposerNativeWindow::dequeueBuffer(BaseNativeWindowBuffer**, int*): Assertion `!m_bufList.empty()' failed.
Aborted