kbd: Ignore fake shift keys

AT keyboards can produce "fake" shift keys on some extended events.
It's not necessary to process these artificial events as the actual
extended keys are detected directly.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

diff --git a/src/kbd.c b/src/kbd.c
index b00853ffe209450000c13dff1b5f744e725bf9f3..b93d9d211c728fb0f731ee12c39a8b2766882f21 100644 (file)
--- a/src/kbd.c
+++ b/src/kbd.c
@@ -428,10 +428,16 @@ __process_key(u8 scancode)
         return;
     case 0x2a: /* L Shift press */
     case 0xaa: /* L Shift release */
+        if (flags1 & KF1_LAST_E0)
+            // Ignore fake shifts
+            return;
         kbd_set_flag(key_release, KF0_LSHIFT, 0, 0);
         return;
     case 0x36: /* R Shift press */
     case 0xb6: /* R Shift release */
+        if (flags1 & KF1_LAST_E0)
+            // Ignore fake shifts
+            return;
         kbd_set_flag(key_release, KF0_RSHIFT, 0, 0);
         return;
     case 0x1d: /* Ctrl press */