I inserted a printk into ps2_handle_response(struct ps2dev *ps2dev, unsigned char data) in "drivers/input/serio/libps2.c" and other functions in the file. It really eats scancodes from the keyboard, as I see (0x23 is the 'H' press scancode). Seems like the scancodes are mixed with reasonable values. Is it a bug in the controller? Got all this on Lenovo Ideapad Y550P notebook with Synaptics PS/2 touchpad. PS2 init PS2 begin command PS2 command PS2 send byte PS2 end command PS2 begin command PS2 command PS2 send byte PS2 end command PS2 init PS2 begin command PS2 command PS2 send byte PS2 handle ack 0xfa PS2 handle responce 0x23 PS2 adjust timeout PS2 end command PS2 init PS2 begin command PS2 command PS2 send byte PS2 handle ack 0xfa PS2 handle responce 0xab PS2 adjust timeout PS2 handle responce 0x41 PS2 end command PS2 begin command PS2 command PS2 send byte PS2 handle ack 0xfa PS2 end command PS2 begin command PS2 command PS2 send byte PS2 handle ack 0x23 PS2 handle ack 0xfa PS2 send byte PS2 handle ack 0xfa PS2 end command PS2 begin command PS2 command PS2 send byte PS2 handle ack 0xfa PS2 send byte PS2 handle ack 0xfa PS2 end command PS2 begin command PS2 command PS2 send byte PS2 handle ack 0xfa PS2 end command On Sat, Dec 7, 2013 at 3:01 PM, Andrey Moiseev <o2g.org.ru@xxxxxxxxx> wrote: > psmouse module is not loaded when I hold down a key on boot (when > GRUB2 says "loading vmlinuz"), and, in its turn, the PS/2 touchpad > doesn't work. Latest mainline kernel, latest stable one and probably > many older ones. I guess i8042's buffer gets full and that confuses > drivers somehow. > > On Fri, Dec 6, 2013 at 9:22 PM, Andrey Moiseev <o2g.org.ru@xxxxxxxxx> wrote: >> This is an ancient bug, I noticed it since I bought my notebook. >> Synaptics PS/2 touchpad is not detected and is not shown in >> /dev/input/event* if I hold a keyboard key down when booting just >> started. -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
