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The placeholder DisplaySurface does not have a GL texture. Other GL-capable UI backends already guard against this: both sdl2_gl_switch() (ui/sdl2-gl.c) and the 2D SDL path (ui/sdl2-2d.c) check surface_is_placeholder() before touching GL-texture state. This patch adds an equivalent check in ui/dbus-listener.c dbus_gl_gfx_switch(). Signed-off-by: Rick Vernam --- ui/dbus-listener.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/ui/dbus-listener.c b/ui/dbus-listener.c index 2e2f6ba418..5f627f6acf 100644 --- a/ui/dbus-listener.c +++ b/ui/dbus-listener.c @@ -861,6 +861,9 @@ static void dbus_gl_gfx_switch(DisplayChangeListener *d= cl, trace_dbus_gl_gfx_switch(new_surface); =20 ddl->ds =3D new_surface; + if (surface_is_placeholder(new_surface)) { + return; /* nothing real to scan out; avoid dereferencing a non-G= L surface */ + } ddl->ds_share =3D SHARE_KIND_NONE; if (ddl->ds) { int width =3D surface_width(ddl->ds); --=20 2.55.0