2.2.1: Serial/modem problems at high speeds

Mikael Nilsson (m94mni@student.tdb.uu.se)
31 Jan 1999 17:24:15 +0100


Hi there!

I just installed the 2.2.1 kernel, and have everything working great
except my PPP connection to my ISP over my 33600 modem.

After some experimenting, it seems like it works at low speeds (giving pppd
the speed 19200 works) but at higher speeds I get bad fcs (bad
frames), and most of the time fail to connect (or link is terribly
slow and instable). I want 115200, of course.

I'm using pppd-2.3.5, and everything works when I reboot to
my old 2.0.34 kernel, so the problem seems to be in the 2.2.1 kernel.

I don't have a clue, does anyone else?

I could give you logs if anyone is interested...

Thanks in advance,

Mikael Nilsson <m94mni@student.tdb.uu.se>

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