我正在尝试hellogl_es2通过指定eglfs平台来运行没有 X Server 的 Qt 示例：
> ./hellogl_es2 -platform eglfs
No protocol specified
Segmentation fault (core dumped)
CPU 是飞思卡尔 i.MX6。
Linux 内核是 3.10.17。
发行版是 Ubuntu 14.04.4 LTS（值得信赖）。
Qt 版本是 5.2.1，从http://packages.ubuntu.com安装，armhf架构，包qtbase5-dev，，。qtbase5-examplesqtbase5-examples-dbg
核心转储是（问题gcoOS_InitLocalDisplayInfoin libGAL.so）：
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Reading symbols from hellogl_es2...Reading symbols from /usr/lib/debug/.build-id/6f/8a8dfdb5abe920e37000a98092b4058b56da0a.debug...done.
done.
[New LWP 2802]
[New LWP 2803]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
Core was generated by `./hellogl_es2 -platform eglfs'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0xb5dd0c84 in gcoOS_InitLocalDisplayInfo () from /usr/lib/arm-linux-gnueabihf/vivante/libGAL.so
(gdb) bt
#0 0xb5dd0c84 in gcoOS_InitLocalDisplayInfo () from /usr/lib/arm-linux-gnueabihf/vivante/libGAL.so
#1 0xb5d095f8 in ?? () from /usr/lib/arm-linux-gnueabihf/libEGL.so.1
/build/buildd/gdb-7.7.1/gdb/frame.c:472: internal-error: get_frame_id: Assertion `fi->this_id.p' failed.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
该行为与其他 Qt 示例项目相同。
X 服务器运行时，指定xcb平台（-platform xcb，即默认值）工作正常。