[Qtwebengine] gl_context_glx.cc(69) Failed to create GL context with glXCreateContextAttribsARB

[Notorious]

Hi all,

When using qWebEngine on a laptop with i915 graphics driver (Intel 3rd 
gen GPU) on kernel 3.14-1 nothing gets rendered and following messages 
occur:
gl_context_glx.cc(69) Failed to create GL context with 
glXCreateContextAttribsARB
command_buffer_proxy_impl.cc(165) Failed to initialize command buffer 
service.

I googled around and apparently this patch 
(https://codereview.chromium.org/93593002/) was created to automatically 
fall back on sofware rendering if this situation does occur.
As far as I can see these changes are present in the chromium fork on 
qt-labs, but it obviously doesn't fall back on software rendering.

Is there any way to force software rendering to work around this issue? 
As with "chromium --disable-gpu"?

Kind Regards