I use small machine (P60) under linux-2.1 as a small dial-in modem
pool. Under 2.1.88 ppp works fine, but under 2.1.115-2.1.119 the
first users conection after reboot is OK, but after day of work
pppd don't sent LCP requests. I run pppd under strace and see
that syscall write() with LCP packet works OK, but no one byte
sent to modem. After reboot all again works correct for a some time.
Also if pppd fail on "no responce to 4 LCP-echo requests" pppd
stoped on syscall ioctl(tty_fd, TIOCSETD, N_TTY) in disestablish_ppp()
function (ppp-2.3.5). Only kill -15 release pppd from this place
and this ioctl return with "interupted system call".
If additional information needed please send me e-mail request.
Stanislav Voronyi.
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