Unsolved i.MX6SL + Buildroot; issues in getting graphics acceleration working

[Jari Peltonen]

Hi,
I'm working on i.MX6 SoloLite Evaluation Kit, my SW environment is Buildroot 2017.02.
I'm trying to get graphics acceleration working on this setup, but the screen stays blank (black) and I'm seeing the following error message on trace log:

qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_viv")
qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_viv")
qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_viv"
qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_viv"
QEGLPlatformContext: Failed to create context: 3005
EGLFS: Failed to create compositing context
Aborted

As far as I understand, the plugin is the correct one (eglfs), and the i.MX GPU Vivante is also working correctly. But something is obviously missing/wrong. Some configuration parameter still needs adjusting...?
Thanks for any hint or advice you might have that would fix the issue!
Best Regards,
Jari Peltonen

[Jari Peltonen]

Actually, here's the trace output (some lines were missing):
qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_viv")
qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_viv")
qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_viv"
qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_viv"
qt.qpa.input: libinput: input device '20b8000.kpp', /dev/input/event0 is tagged by udev as: Keyboard
qt.qpa.input: libinput: input device '20b8000.kpp', /dev/input/event0 is a keyboard
qt.qpa.input: libinput: input device 'WM8962 Beep Generator', /dev/input/event1 not tagged as input device
qt.qpa.input: libinput: not using input device '/dev/input/event1'.
qt.qpa.input: Using xkbcommon for key mapping
xkbcommon: ERROR: failed to add default include path /usr/share/X11/xkb
Failed to create xkb context
No signal BREAK defined
QEGLPlatformContext: Failed to create context: 3005
EGLFS: Failed to create compositing context
Aborted

Regards, Jari