testing single key evdev switching

qemu-evdev-remap.patch

diff --git a/ui/input-linux.c b/ui/input-linux.c
index 9720333b2c..485b3bc9c6 100644
--- a/ui/input-linux.c
+++ b/ui/input-linux.c
@@ -16,6 +16,14 @@
 #include <sys/ioctl.h>
 #include "standard-headers/linux/input.h"
 
+#ifndef EVDEV_SWITCH_KEY_1
+#define EVDEV_SWITCH_KEY_1 KEY_CAPSLOCK
+#endif
+

 static bool linux_is_button(unsigned int lnx)
 {
     if (lnx < 0x100) {
@@ -134,8 +142,8 @@ static void input_linux_handle_keyboard(InputLinux *il,
         }
 
         /* hotkey -> record switch request ... */
-        if (il->keydown[KEY_LEFTCTRL] &&
-            il->keydown[KEY_RIGHTCTRL]) {
+        if (il->keydown[EVDEV_SWITCH_KEY_1] {
             il->grab_request = true;
         }
 
-- 
2.20.1