1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/video/intelfb/intelfbdrv.c b/drivers/video/intelfb/intelfbdrv.c
index ace14fe02fc4..0cafd642fbc0 100644
--- a/drivers/video/intelfb/intelfbdrv.c
+++ b/drivers/video/intelfb/intelfbdrv.c
@@ -1365,6 +1365,11 @@ static int intelfb_set_par(struct fb_info *info)
         DBG_MSG("intelfb_set_par (%dx%d-%d)\n", info->var.xres,
                 info->var.yres, info->var.bits_per_pixel);
 
+        /*
+         * Disable VCO prior to timing register change.
+         */
+        OUTREG(DPLL_A, INREG(DPLL_A) & ~DPLL_VCO_ENABLE);
+
         intelfb_blank(FB_BLANK_POWERDOWN, info);
 
         if (ACCEL(dinfo, info))