Call TSXFlush after setting DGA palette, so it updates immediately.
[wine] / dlls / ddraw / dsurface /
drwxr-xr-x   ..
-rw-r--r-- 8013 dga.c
-rw-r--r-- 4223 dga2.c
-rw-r--r-- 33844 main.c
-rw-r--r-- 15186 x11.c