@@ -1762,6 +1762,12 @@ static void vga_draw_blank(VGACommonState *s, int full_update)
if (s->last_scr_width <= 0 || s->last_scr_height <= 0)
return;
+ if (is_buffer_shared(surface)) {
+ /* unshare buffer, otherwise the blanking corrupts vga vram */
+ surface = qemu_create_displaysurface(s->last_scr_width, s->last_scr_height);
+ dpy_gfx_replace_surface(s->con, surface);
+ }
+
w = s->last_scr_width * surface_bytes_per_pixel(surface);
d = surface_data(surface);
for(i = 0; i < s->last_scr_height; i++) {
In case the display surface uses a shared buffer (i.e. uses vga vram directly instead of a shadow) go unshare the buffer before clearing it. This avoids vga memory corruption, which in turn fixes unblanking not working properly with X11. Cc: qemu-stable@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2067 Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> --- hw/display/vga.c | 6 ++++++ 1 file changed, 6 insertions(+)