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Dead modem on iBook G3 FireWire (proper repost)

	Sorry for reposting, but the first try was an unfortunate
thread hijack, and lacking in details.

	I am writing from an iBook G3 FireWire (the Lime 'portable
toilet seat model').  Some three years ago it worked OK with both Mac OS 9
and the 2.4 kernel to do dial-up access.

	Now I moved after the upgrade to 2.6.7-powerpc, haven't an
Ethernet connection yet and discovered I can't connect with neither wvdial
nor pon.

	From /var/log/dmesg:
pmac_zilog: i2c-modem detected, id: 1 [...]
pmac_zilog: 0.6 (Benjamin Herrenschmidt <benh@kernel.crashing.org>) ttyS0
at MMIO 0x80013020 (irq = 22) is a Z85c30 ESCC - Internal modem ttyS1 at
MMIO 0x80013000 (irq = 50) is a Z85c30 ESCC - Serial port


       From messages:
Aug 19 01:38:15 leandrod pppd[21632]: pppd 2.4.2 started by root, uid 0
Aug 19 01:38:16 leandrod chat[21633]: abort on (BUSY) Aug 19 01:38:16
leandrod chat[21633]: abort on (NO CARRIER) Aug 19 01:38:16 leandrod
chat[21633]: abort on (VOICE) Aug 19 01:38:16 leandrod chat[21633]: abort
on (NO DIALTONE) Aug 19 01:38:16 leandrod chat[21633]: abort on (NO DIAL
TONE) Aug 19 01:38:16 leandrod chat[21633]: abort on (NO ANSWER) Aug 19
01:38:16 leandrod chat[21633]: abort on (DELAYED) Aug 19 01:38:16 leandrod
chat[21633]: send (ATZ^M) Aug 19 01:38:16 leandrod chat[21633]: expect
(OK) Aug 19 01:38:31 leandrod FaxGetty[6247]: STATE CHANGE: RUNNING ->
LOCKWAIT (timeout 30) Aug 19 01:39:01 leandrod chat[21633]: alarm Aug 19
01:39:01 leandrod chat[21633]: send (AT^M) Aug 19 01:39:01 leandrod
chat[21633]: expect (OK) Aug 19 01:39:46 leandrod chat[21633]: alarm Aug
19 01:39:46 leandrod chat[21633]: Failed Aug 19 01:41:38 leandrod
pppd[21632]: Exit. [...]
Aug 19 20:13:13 leandrod FaxGetty[6247]: /dev/ttyS0: Can not initialize
modem. Aug 19 20:13:13 leandrod FaxGetty[6247]: STATE CHANGE: LISTENING ->
MODEMWAIT (timeout 30) [...]
Aug 19 20:14:30 leandrod FaxGetty[6247]: Unable to setup modem on
/dev/ttyS0; giving up after 2 attempts Aug 19 20:14:30 leandrod
FaxGetty[6247]: CLOSE /dev/ttyS0 Aug 19 20:14:31 leandrod FaxGetty[21993]:
OPEN /dev/ttyS0  HylaFAX (tm) Version 4.1.8 Aug 19 20:14:39 leandrod
FaxGetty[21993]: /dev/ttyS0: Can not initialize modem. Aug 19 20:14:39
leandrod FaxGetty[21993]: STATE CHANGE: BASE -> MODEMWAIT (timeout 30)


	ppp.log:
Aug 19 01:38:15 leandrod pppd[21632]: pppd 2.4.2 started by root, uid 0
Aug 19 01:38:16 leandrod chat[21633]: abort on (BUSY) Aug 19 01:38:16
leandrod chat[21633]: abort on (NO CARRIER) Aug 19 01:38:16 leandrod
chat[21633]: abort on (VOICE) Aug 19 01:38:16 leandrod chat[21633]: abort
on (NO DIALTONE) Aug 19 01:38:16 leandrod chat[21633]: abort on (NO DIAL
TONE) Aug 19 01:38:16 leandrod chat[21633]: abort on (NO ANSWER) Aug 19
01:38:16 leandrod chat[21633]: abort on (DELAYED) Aug 19 01:38:16 leandrod
chat[21633]: send (ATZ^M) Aug 19 01:38:16 leandrod chat[21633]: expect
(OK) Aug 19 01:39:01 leandrod chat[21633]: alarm Aug 19 01:39:01 leandrod
chat[21633]: send (AT^M) Aug 19 01:39:01 leandrod chat[21633]: expect (OK)
Aug 19 01:39:46 leandrod chat[21633]: alarm Aug 19 01:39:46 leandrod
chat[21633]: Failed Aug 19 01:39:46 leandrod pppd[21632]: Connect script
failed Aug 19 01:41:38 leandrod pppd[21632]: Exit.


	syslog:
Aug 20 08:27:22 leandrod FaxGetty[32175]: Unable to setup modem on
/dev/ttyS0; giving up after 2 attempts Aug 20 08:27:22 leandrod
FaxGetty[32175]: MODEM /dev/ttyS0 appears to be wedged Aug 20 08:27:22
leandrod FaxGetty[32175]: CLOSE /dev/ttyS0 Aug 20 08:27:22 leandrod
FaxGetty[32314]: OPEN /dev/ttyS0  HylaFAX (tm) Version 4.1.8 Aug 20
08:27:30 leandrod FaxGetty[32314]: /dev/ttyS0: Can not initialize modem.
Aug 20 08:27:30 leandrod FaxGetty[32314]: STATE CHANGE: BASE -> MODEMWAIT
(timeout 30) Aug 20 08:28:47 leandrod FaxGetty[32314]: Unable to setup
modem on /dev/ttyS0; giving up after 2 attempts


	And:
root@leandrod:~# wvdial
--> WvDial: Internet dialer version 1.54.0 --> Initializing modem.
--> Sending: ATZ
--> Sending: ATQ0
--> Re-Sending: ATZ
--> Modem not responding.


	How can I debug this?

	Thanks in advance.

-- 
Leandro Guimarães Faria Corsetti Dutra <leandro@dutra.fastmail.fm>
Maringá, PR, BRASIL
http://br.geocities.com./lgcdutra/
Soli Deo Gloria!
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