From pppoe.conf # Do you want to use synchronous PPP? "yes" or "no". "yes" is much # easier on CPU usage, but may not work for you. It is safer to use # "no", but you may want to experiment with "yes". "yes" is generally # safe on Linux machines with the n_hdlc line discipline; unsafe on others. SYNCHRONOUS=no On the Soekris it is taking quite some cpu cycles. CONFIG_SERIAL_NONSTANDARD=y/m CONFIG_N_HDLC=y/m
Fixed in CVS, scheduled for 1.8 release.
Shipped in 1.8