force EFI text mode when entering the menu

1 files changed, 46 insertions, 0 deletions

diff --git a/gummiboot.c b/gummiboot.c
index 8e5e35b..681b8c5 100644
--- a/gummiboot.c
+++ b/gummiboot.c
@@ -384,6 +384,51 @@ static VOID dump_status(Config *config) {
         uefi_call_wrapper(ST->ConOut->ClearScreen, 1, ST->ConOut);
 }
 
+static EFI_STATUS console_text_mode(VOID) {
+        #define EFI_CONSOLE_CONTROL_PROTOCOL_GUID \
+                { 0xf42f7782, 0x12e, 0x4c12, { 0x99, 0x56, 0x49, 0xf9, 0x43, 0x4, 0xf7, 0x21 }};
+
+        struct _EFI_CONSOLE_CONTROL_PROTOCOL;
+
+        typedef enum {
+                EfiConsoleControlScreenText,
+                EfiConsoleControlScreenGraphics,
+                EfiConsoleControlScreenMaxValue,
+        } EFI_CONSOLE_CONTROL_SCREEN_MODE;
+
+        typedef EFI_STATUS (*EFI_CONSOLE_CONTROL_PROTOCOL_GET_MODE)(
+                struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
+                EFI_CONSOLE_CONTROL_SCREEN_MODE *Mode,
+                BOOLEAN *UgaExists,
+                BOOLEAN *StdInLocked
+        );
+
+        typedef EFI_STATUS (*EFI_CONSOLE_CONTROL_PROTOCOL_SET_MODE)(
+                struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
+                EFI_CONSOLE_CONTROL_SCREEN_MODE Mode
+        );
+
+        typedef EFI_STATUS (*EFI_CONSOLE_CONTROL_PROTOCOL_LOCK_STD_IN)(
+                struct _EFI_CONSOLE_CONTROL_PROTOCOL *This,
+                CHAR16 *Password
+        );
+
+        typedef struct _EFI_CONSOLE_CONTROL_PROTOCOL {
+                EFI_CONSOLE_CONTROL_PROTOCOL_GET_MODE GetMode;
+                EFI_CONSOLE_CONTROL_PROTOCOL_SET_MODE SetMode;
+                EFI_CONSOLE_CONTROL_PROTOCOL_LOCK_STD_IN LockStdIn;
+        } EFI_CONSOLE_CONTROL_PROTOCOL;
+
+        EFI_GUID ConsoleControlProtocolGuid = EFI_CONSOLE_CONTROL_PROTOCOL_GUID;
+        EFI_CONSOLE_CONTROL_PROTOCOL *ConsoleControl = NULL;
+        EFI_STATUS err;
+
+        err = LibLocateProtocol(&ConsoleControlProtocolGuid, (VOID **)&ConsoleControl);
+        if (EFI_ERROR(err))
+                return err;
+        return uefi_call_wrapper(ConsoleControl->SetMode, 2, ConsoleControl, EfiConsoleControlScreenText);
+}
+
 static BOOLEAN menu_run(Config *config, ConfigEntry **chosen_entry) {
         EFI_STATUS err;
         INTN visible_max;
@@ -404,6 +449,7 @@ static BOOLEAN menu_run(Config *config, ConfigEntry **chosen_entry) {
         BOOLEAN exit = FALSE;
         BOOLEAN run = TRUE;
 
+        console_text_mode();
         uefi_call_wrapper(ST->ConIn->Reset, 2, ST->ConIn, FALSE);
         uefi_call_wrapper(ST->ConOut->EnableCursor, 2, ST->ConOut, FALSE);
         uefi_call_wrapper(ST->ConOut->SetAttribute, 2, ST->ConOut, EFI_LIGHTGRAY|EFI_BACKGROUND_BLACK);