( from dmesg )
--- lp0: using parport0 (interrupt-driven). Software Watchdog Timer: 0.05, timer margin: 70 sec Ugh at c0110644 registered device ppp0---...using mgetty-1.1.9-Aug17 when it initializes a fax/modem in fax mode which sits on ttyS3 (irq 11)
The address of the Ugh is, from System.map, :
c01105fc T do_page_fault
2.1.60-SMP / Tyan dual PPRO-200
-- Manuel J. Galan manolow@step.es