Do not load virtual keyboards in tsak

This resolves Bug 1275
(cherry picked from commit 8d2f9ae315)

tsak/main.cpp

@@ -234,6 +234,10 @@ int find_keyboards() {
 			// Ensure that we do not detect our own tsak faked keyboards
 			ioctl (fd, EVIOCGNAME(sizeof(name)), name);
 			if (str_ends_with(name, "+tsak") == 0) {
+				// Do not attempt to use virtual keyboards per Bug 1275
+				struct input_id input_info;
+				ioctl (fd, EVIOCGID, &input_info);
+				if ((input_info.vendor != 0) && (input_info.product != 0)) {
 					/* We assume that anything that has an alphabetic key in the
 						QWERTYUIOP range in it is the main keyboard. */
 					for (j = KEY_Q; j <= KEY_P; j++) {
@@ -242,6 +246,7 @@ int find_keyboards() {
 						}
 					}
 				}
+			}
 	
 			if (keyboard_fds[keyboard_fd_num] == 0) {
 				close(fd);