It's problems using ppp driver in 2.6.17-rc2(and rc1) Kernel lose packets. e.g. $ ping -c10 google.com PING google.com (64.233.187.99) 56(84) bytes of data. 64 bytes from 64.233.187.99: icmp_seq=2 ttl=234 time=557 ms 64 bytes from 64.233.187.99: icmp_seq=3 ttl=234 time=558 ms 64 bytes from 64.233.187.99: icmp_seq=4 ttl=234 time=575 ms 64 bytes from 64.233.187.99: icmp_seq=5 ttl=234 time=597 ms 64 bytes from 64.233.187.99: icmp_seq=6 ttl=234 time=579 ms 64 bytes from 64.233.187.99: icmp_seq=7 ttl=234 time=580 ms 64 bytes from 64.233.187.99: icmp_seq=8 ttl=234 time=576 ms 64 bytes from 64.233.187.99: icmp_seq=9 ttl=234 time=659 ms --- google.com ping statistics --- 10 packets transmitted, 8 received, 20% packet loss, time 11355ms rtt min/avg/max/mdev = 557.688/585.883/659.876/30.434 ms I use "pppd call mts" command to connect ------------------- /etc/ppp/peers/mts hide-password noauth connect "/usr/sbin/chat -f /etc/ppp/mts.chat" /dev/ttyACM0 115200 defaultroute noipdefault user "mts" remotename mts ipparam mts usepeerdns nobsdcomp nodeflate novj nodetach usepeerdns -------------------- pppd version 2.4.3 No such problem with 2.6.16.x lsmod output Module Size Used by ppp_async 8448 1 ppp_generic 22420 5 ppp_async slhc 6016 1 ppp_generic crc_ccitt 1920 1 ppp_async fglrx 444876 21 snd_rtctimer 2444 1 i2c_i801 7564 0 i2c_dev 7172 0 raw 6560 1 ipv6 216032 18 joydev 7872 0 snd_es1938 17444 0 snd_opl3_lib 8320 1 snd_es1938 snd_hwdep 6788 1 snd_opl3_lib snd_mpu401_uart 5504 1 snd_es1938 snd_rawmidi 18592 1 snd_mpu401_uart snd_pcm_oss 36768 0 snd_mixer_oss 15488 1 snd_pcm_oss snd_intel8x0 27804 2 snd_ac97_codec 85280 1 snd_intel8x0 snd_ac97_bus 1920 1 snd_ac97_codec snd_pcm 72840 5 snd_es1938,snd_pcm_oss,snd_intel8x0,snd_ac97_codec snd_page_alloc 7688 2 snd_intel8x0,snd_pcm parport_pc 25284 1 lp 9160 0 parport 19008 2 parport_pc,lp usblp 11136 0 iptable_filter 2304 0 ip_tables 10840 1 iptable_filter x_tables 10500 1 ip_tables af_packet 15624 0 it87 17572 0 hwmon_vid 2816 1 it87 i2c_isa 3456 1 it87 ide_cd 35588 0 cdrom 37024 1 ide_cd loop 12808 0 reiser4 372056 1 supermount 33172 1 configfs 21520 1 intel_agp 18844 1 agpgart 26588 2 fglrx,intel_agp i8xx_tco 5908 0 snd_seq_oss 28672 0 snd_seq_midi_event 5632 1 snd_seq_oss snd_seq 42704 5 snd_seq_oss,snd_seq_midi_event snd_timer 18948 4 snd_rtctimer,snd_opl3_lib,snd_pcm,snd_seq snd_seq_device 6540 4 snd_opl3_lib,snd_rawmidi,snd_seq_oss,snd_seq snd 42724 18 snd_es1938,snd_opl3_lib,snd_hwdep,snd_mpu401_uart,snd_rawmidi,snd_pcm_oss,snd_mixer_oss,snd_intel8x0,snd_ac97_codec,snd_pcm,snd_seq_oss,snd_seq,snd_timer,snd_seq_device soundcore 7008 1 snd evdev 7680 1 analog 9888 0 ns558 4608 0 gameport 10504 4 snd_es1938,analog,ns558 8139too 21376 0 mii 4736 1 8139too cdc_acm 11040 2 uhci_hcd 18828 0 ehci_hcd 26248 0 ohci_hcd 17668 0 usbcore 108288 6 usblp,cdc_acm,uhci_hcd,ehci_hcd,ohci_hcd container 3328 0 button 5008 0 Vladimir - To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html