2 files changed, 13 insertions, 3 deletions

diff --git a/drivers/video/neofb.c b/drivers/video/neofb.c
index b85e2b180a44..a2e201dc40f7 100644
--- a/drivers/video/neofb.c
+++ b/drivers/video/neofb.c
@@ -843,6 +843,9 @@ static int neofb_set_par(struct fb_info *info)
 
         par->SysIfaceCntl2 = 0xc0;      /* VESA Bios sets this to 0x80! */
 
+        /* Initialize: by default, we want display config register to be read */
+        par->PanelDispCntlRegRead = 1;
+
         /* Enable any user specified display devices. */
         par->PanelDispCntlReg1 = 0x00;
         if (par->internal_display)
@@ -1334,11 +1337,17 @@ static int neofb_blank(int blank_mode, struct fb_info *info)
         struct neofb_par *par = info->par;
         int seqflags, lcdflags, dpmsflags, reg;
 
+
         /*
-         * Reload the value stored in the register, might have been changed via
-         * FN keystroke
+         * Reload the value stored in the register, if sensible. It might have
+         * been changed via FN keystroke.
          */
-        par->PanelDispCntlReg1 = vga_rgfx(NULL, 0x20) & 0x03;
+        if (par->PanelDispCntlRegRead) {
+                neoUnlock();
+                par->PanelDispCntlReg1 = vga_rgfx(NULL, 0x20) & 0x03;
+                neoLock(&par->state);
+        }
+        par->PanelDispCntlRegRead = !blank_mode;
 
         switch (blank_mode) {
         case FB_BLANK_POWERDOWN:        /* powerdown - both sync lines down */
diff --git a/include/video/neomagic.h b/include/video/neomagic.h
index 1d69049bd4c1..78b1f15a538f 100644
--- a/include/video/neomagic.h
+++ b/include/video/neomagic.h
@@ -159,6 +159,7 @@ struct neofb_par {
         unsigned char PanelDispCntlReg1;
         unsigned char PanelDispCntlReg2;
         unsigned char PanelDispCntlReg3;
+        unsigned char PanelDispCntlRegRead;
         unsigned char PanelVertCenterReg1;
         unsigned char PanelVertCenterReg2;
         unsigned char PanelVertCenterReg3;