i915: fix AR register restore.

Make sure the restoration correctly restores the AR registers by
flipping the ARX register into index mode before doing anything.

Without this, some people have had the text mode restore all green.

Signed-off-by: Jesse Barnes <jesse.barnes@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/char/drm/i915_drv.c b/drivers/char/drm/i915_drv.c
index 4048f39b7eed..b2b451dc4460 100644
--- a/drivers/char/drm/i915_drv.c
+++ b/drivers/char/drm/i915_drv.c
@@ -222,6 +222,7 @@ static void i915_restore_vga(struct drm_device *dev)
                            dev_priv->saveGR[0x18]);
 
         /* Attribute controller registers */
+        inb(st01);
         for (i = 0; i < 20; i++)
                 i915_write_ar(st01, i, dev_priv->saveAR[i], 0);
         inb(st01); /* switch back to index mode */