@@ -3149,6 +3149,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
them quite hard to use for exploits but
might break your system.
+ vt.init_hide= [VT] Hide initial console
+ Format: <bool> (0 = visible (default), 1 = invisible)
+ When set, the console will be invisible initially.
+ This prevents mode switches, buffer clears, and screen
+ display from the console code during boot. Switching
+ to a console device at runtime using the VT_ACTIVATE
+ ioctl will make its contents visible.
+
vt.cur_default= [VT] Default cursor shape.
Format: 0xCCBBAA, where AA, BB, and CC are the same as
the parameters of the <Esc>[?A;B;Cc escape sequence;
@@ -165,6 +165,9 @@ module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
static int cur_default = CUR_DEFAULT;
module_param(cur_default, int, S_IRUGO | S_IWUSR);
+static bool init_hide;
+module_param(init_hide, bool, S_IRUGO);
+
/*
* ignore_poke: don't unblank the screen when things are typed. This is
* mainly for the privacy of braille terminal users.
@@ -734,6 +737,7 @@ static void visual_init(struct vc_data *vc, int num, int init)
__module_get(vc->vc_sw->owner);
vc->vc_num = num;
vc->vc_display_fg = &master_display_fg;
+ vc->vc_hidden = init_hide;
vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir;
vc->vc_uni_pagedir = 0;
vc->vc_hi_font_mask = 0;
@@ -2336,6 +2340,9 @@ static void console_callback(struct work_struct *ignored)
if (want_console >= 0) {
if (want_console != fg_console &&
vc_cons_allocated(want_console)) {
+ if (want_console != SUSPEND_CONSOLE &&
+ fg_console != SUSPEND_CONSOLE)
+ vc_cons[want_console].d->vc_hidden = 0;
hide_cursor(vc_cons[fg_console].d);
change_console(vc_cons[want_console].d);
/* we only changed when the console had already
@@ -91,6 +91,7 @@ struct vc_data {
unsigned int vc_can_do_color : 1;
unsigned int vc_report_mouse : 2;
unsigned char vc_utf : 1; /* Unicode UTF-8 encoding */
+ unsigned int vc_hidden : 1; /* Set by vt.init_hide */
unsigned char vc_utf_count;
int vc_utf_char;
unsigned int vc_tab_stop[8]; /* Tab stops. 256 columns. */
@@ -134,6 +135,6 @@ extern void vc_SAK(struct work_struct *work);
#define CUR_DEFAULT CUR_UNDERLINE
-#define CON_IS_VISIBLE(conp) (*conp->vc_display_fg == conp)
+#define CON_IS_VISIBLE(conp) (*conp->vc_display_fg == conp && !conp->vc_hidden)
#endif /* _LINUX_CONSOLE_STRUCT_H */
@@ -11,6 +11,8 @@
#define VT_UPDATE 0x0004 /* A bigger update occurred */
#define VT_PREWRITE 0x0005 /* A char is about to be written to the console */
+#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
+
#ifdef CONFIG_VT_CONSOLE
extern int vt_kmsg_redirect(int new);
@@ -10,8 +10,6 @@
#include <linux/module.h>
#include "power.h"
-#define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
-
static int orig_fgconsole, orig_kmsg;
int pm_prepare_console(void)