Messages in this thread | | | Date | Mon, 22 Oct 2001 16:36:25 +0100 | From | <> (Walter Harms) | Subject | possible bug in 2.4.x pc_keyb.c |
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hi list,
keyboard disappears with 2.4.x kernel on notebook (compaq amarda)
After some time the keyboard from my amarda notebook does not respond to anything. The only hint is that "keyboard: Timeout - AT keyboard not present?" appears quit often in the syslog before the kbd stops working.
Comparing the 2.2.x code (no problems) with the 2.4.x code i found pckbd_leds() as prime suspect. as you can see it sets kbd_exists = 0 (FALSE) after sending an ENABLE. I am not sure if this is my probleme (read: no time to check if this fix works) but i guess its wrong.
Note: 1. the error isnt easy reproduceable but appears only with the 2.4.x 2. send_data returns 1 for acknowledge else 0 3. kann sombody please document kbd_exists ?
walter
org:
void pckbd_leds(unsigned char leds) { if (kbd_exists && (!send_data(KBD_CMD_SET_LEDS) || !send_data(leds))) { send_data(KBD_CMD_ENABLE); /* re-enable kbd if any errors * / kbd_exists = 0; } }
my idea:
if () { if (send_data(KBD_CMD_ENABLE)){ printk(KERN_WARNING "Keyboard off-line ?!\n"); kbd_exists = FALSE; } } - 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/
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