UBUNTU: SAUCE: vt -- allow grub to request automatic vt_handoff

Grub may be able to select a graphics mode and paint a splash screen
for us.  If so it needs to be able to tell us it has done so.  Add
support for detecting a new graphics mode selected bit in the
screen_info passed over at boot.  Use this to automatically enable
vt_handoff mode.

Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 1a6dd63097f..15764df2a00 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -2894,6 +2894,13 @@ static int __init con_init(void)
         struct vc_data *vc;
         unsigned int currcons = 0, i;
 
+        if (screen_info.flags & VIDEO_FLAGS_HANDOFF) {
+                if (vt_handoff == 0)
+                        vt_handoff = 8;
+                printk(KERN_INFO "vt handoff: grub requested handoff (vt#%d)\n",
+                        vt_handoff);
+        }
+
         console_lock();
 
         if (conswitchp)