Commen=
t # 36
on bug 78453<=
/a>
from Michel D=C3=A4nzer
(In reply to comment #=
34)
> Unfortunatly egltri_screen display a triangle bu=
t sometimes and in a very
> broken way : always a message about gpu stall, sometimes it display ga=
rbage,
> sometimes a triangle but on the right or on the left. The gpu is
> definitively doing some rendering works correctly but it fails before
> swapping buffer.
Beware that it might display something from a previous run even if it doesn=
't
actually render anything. To rule that out, you may want to use another sim=
ple
test, e.g. one that only clears the window with glClear(), and alternate
between the tests, so you can tell whether they actually render anything.
> BTW why eglinfo also make the gpu stall ? As far=
as I can tell there is no
> draw operation involved, just egl initialisation and unintialisation.<=
/span >
A command stream might still be submitted to the hardware when the EGL cont=
ext
is unbound/destroyed. Should be easy to verify via a breakpoint in gdb.
If that is the case, it might be useful to try narrowing down which part of
that 'empty' command stream hangs the GPU.