A bunch of fixes needed.

drivers/video/aty/atyfb_base.c

@@ -2625,7 +2625,7 @@ static int atyfbcon_switch(int con, struct fb_info *fb)
 
 #ifdef CONFIG_FB_ATY_CT
     /* Erase HW Cursor */
-    if (info->cursor)
+    if (info->cursor && (fb->currcon >= 0))
 	atyfb_cursor(&fb_display[fb->currcon], CM_ERASE,
 		     info->cursor->pos.x, info->cursor->pos.y);
 #endif /* CONFIG_FB_ATY_CT */

drivers/video/fbcon-accel.h

 /*
- *  FBcon low-level driver for 32 bpp packed pixel (cfb32)
+ *  FBcon low-level driver that is a wrapper for the accel engine. 
  */
 
 #ifndef _VIDEO_FBCON_ACCEL_H

drivers/video/sis/sis_main.c

@@ -579,7 +579,6 @@ static void sisfb_set_disp (int con, struct fb_var_screeninfo *var)
 
 	sisfb_get_fix (&fix, con, 0);
 
-	display->screen_base = ivideo.video_vbase;
 	display->visual = fix.visual;
 	display->type = fix.type;
 	display->type_aux = fix.type_aux;
@@ -2769,6 +2768,7 @@ sishw_ext.usExternalChip = 0;
 	fb_info.changevar = NULL;
 	fb_info.node = NODEV;
 	fb_info.fbops = &sisfb_ops;
+	fb_info.screen_base = ivideo.video_vbase;
 	fb_info.disp = &disp;
 	fb_info.currcon = -1;
 	fb_info.switch_con = &sisfb_switch;