Messages in this thread | | | Date | Fri, 8 Apr 2005 11:37:17 +0530 (IST) | From | "P.Manohar" <> | Subject | scancodes to X-Windows |
| |
hai all, The following is the code snippet from drivers/char/keyboard.c
if ((raw_mode = (kbd->kbdmode == VC_RAW))) { /* * The following is a workaround for hardware * which sometimes send the key release event twice */ unsigned char next_scancode = scancode|up_flag; if (up_flag && next_scancode==prev_scancode) { /* unexpected 2nd release event */ } else { prev_scancode=next_scancode; put_queue(next_scancode); } /* we do not return yet, because we want to maintain the key_down array, so that we have the correct values when finishing RAW mode or when changing VT's */ }
I did so much googling, unable find My doubts are,
1)Is in raw mode also the scancodes are send to tty buffer (as we are using put_queue() here. 2) whether X will read from tty buffer are will it take scancodes directly ,in this case where it will store those scancodes,if X is busy doing some other work.
In the put_queue function
#ifdef CONFIG_FORWARD_KEYBOARD extern int forward_chars;
void put_queue(int ch) { if (forward_chars == fg_console+1){ kbd_forward_char (ch); } else { if (tty) { tty_insert_flip_char(tty, ch, 0); con_schedule_flip(tty); } } }
Where that kbd_forward_char is defined or what it will do. what CONFIG_FORWARD_KEYBOARD signifies. This is not present in my config file,(I am using RH linux 2.4.20)
I got confused of it , if you know about please mail me.
Thanks&Regards, P.Manohar,
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |