cdc-acm in ppp problem

[Simon Tutek]

Lep pozdrav!

Prosim za pomoč. Imam problem z ISDN PRO TA modemom in usb povezavo.
Kadar se povezujem preko serijskih vrat deluje vse normalno.
Če pa provežem modem preko USB vrat pa dobim naslednja sporočila v
messeges (debug):

Apr 25 13:41:45 marsimon rc-scripts: Interface seems to be down already
Apr 25 13:41:46 marsimon pppd[8989]: pppd 2.4.1 started by root, uid 0
Apr 25 13:41:47 marsimon chat[8994]: abort on (BUSY)
Apr 25 13:41:47 marsimon chat[8994]: abort on (ERROR)
Apr 25 13:41:47 marsimon chat[8994]: abort on (NO ANSWER)
Apr 25 13:41:47 marsimon chat[8994]: abort on (NO CARRIER)
Apr 25 13:41:47 marsimon chat[8994]: abort on (NO DIALTONE)
Apr 25 13:41:47 marsimon chat[8994]: abort on (Invalid Login)
Apr 25 13:41:47 marsimon chat[8994]: abort on (Login incorrect)
Apr 25 13:41:47 marsimon chat[8994]: send (ATZ^M)
Apr 25 13:41:47 marsimon chat[8994]: expect (OK)
Apr 25 13:41:48 marsimon chat[8994]: TZ^M^M
Apr 25 13:41:48 marsimon chat[8994]: OK
Apr 25 13:41:48 marsimon chat[8994]: -- got it
Apr 25 13:41:48 marsimon chat[8994]: send (ATDP088832480^M)
Apr 25 13:41:48 marsimon chat[8994]: expect (CONNECT)
Apr 25 13:41:48 marsimon chat[8994]: ^M
Apr 25 13:41:53 marsimon chat[8994]: ATDP088832480^M~^?}#@!}!} }
}4}#}$@#}%}&#H[}"}"}&} } } } x7~~^?}#@!}!}!} }4}#}$@#}%
Apr 25 13:41:57 marsimon chat[8994]: }&#H[}"}"}&} } } } 1$~~^?}#@!}!}"}
}4}#}$@#}%}&#H[}"}"}&} } } } {^Y~~^?}#@!}!}#} }4
Apr 25 13:42:00 marsimon CRON[8996]: (root) CMD (test -x
/usr/sbin/run-crons && /usr/sbin/run-crons )
Apr 25 13:42:01 marsimon chat[8994]: }#}$@#}%}&#H[}"}"}&} } } }
2}*~~^?}#@!}!}$} }4}#}$@#}%}&#H[}"}"}&} } } } }^j~~^?}#
Apr 25 13:42:03 marsimon chat[8994]: @!}!}%} }4}#}$@#}%}&#H[}"}"}&} } }
} 7y~~^?}#@!}!}&} }4}#}$@#}%}&#H[}"}"}&} } } }
Apr 25 13:42:07 marsimon chat[8994]: }D~~^?}#@!}!}'}
}4}#}$@#}%}&#H[}"}"}&} } } } 4W~~^?}#@!}!}(} }4}#}$@#}%}&#H[}"}"}
Apr 25 13:42:09 marsimon chat[8994]: &} } } } t}-~^M
Apr 25 13:42:09 marsimon chat[8994]: NO CARRIER
Apr 25 13:42:09 marsimon chat[8994]: -- failed
Apr 25 13:42:09 marsimon chat[8994]: Failed (NO CARRIER)
Apr 25 13:42:09 marsimon pppd[8989]: Connect script failed
Apr 25 13:42:10 marsimon pppd[8989]: Exit.

Povezava uspe 1 X v 20 poskusih. Kaj je narobe?

Primer uspele povezave:
Apr 25 13:22:13 marsimon rc-scripts: Interface seems to be down already
Apr 25 13:22:14 marsimon pppd[4600]: pppd 2.4.1 started by root, uid 0
Apr 25 13:22:15 marsimon pppd[4600]: Serial connection established.
Apr 25 13:22:15 marsimon pppd[4600]: using channel 2
Apr 25 13:22:15 marsimon pppd[4600]: Using interface ppp0
Apr 25 13:22:15 marsimon pppd[4600]: Connect: ppp0 <--> /dev/usb/acm/0
Apr 25 13:22:16 marsimon pppd[4600]: sent [LCP ConfReq id=0x1 <mru 768>
<asyncmap 0x0> <magic 0x1d09ff00> <pcomp> <accomp>]
Apr 25 13:22:19 marsimon pppd[4600]: sent [LCP ConfReq id=0x1 <mru 768>
<asyncmap 0x0> <magic 0x1d09ff00> <pcomp> <accomp>]
Apr 25 13:22:19 marsimon pppd[4600]: rcvd [LCP ConfReq id=0x1 <mru 768>
<asyncmap 0x0> <magic 0x1d09ff00> <pcomp> <accomp>]
...
...
...

Problem se pojavlja na Knoppixu 3.3, Gentoo 1.4 (2.6.5-gentoo jedro) in 
RH 9.

Lučke na modemu utripajo, kot, da sprejema, ne pošilja pa odgovora 
ponudniku (Volja.net).
Kot sem dejal, na serijskih vratih ni težav, vendar jih moj prenosnik
nima ...

Za pomoč se že vnaprej zahvaljujem.
Tudi kakaen nasvet za debugiranje pride prav.