Comment # 4 on bug 1191170 from Fabian Vogt

(In reply to Jon Brightwell from comment #3)
> I have packman installed but this seems to be a vdpau issue?
> I have core dumps from krdc and remmina here.

Is that using wayland? If so, try "krdc -platform xcb" resp. "GDK_BACKEND=x11
remmina".