Am 16.05.2007 14:31 schrieb Ola Lundqvist: >>> When did this problem occur? >> It happens seldom on normal traffic but quite reproducible on several >> machines when downloading large files. It happens not on every attempt, >> but often enough to quickly reproduce it. > > Do it happen if you send large packets over something else than pptp?
I'm currently trying hard to reproduce this bug without pptp, so far without success. It seems it only happens over pptp. I'll let you know ASAP when it happens without pptp, since this would obviously close this bug. >>> What kernel version do you use? >>>> Architecture: amd64 >>>> Kernel: Linux 2.6.18-4-amd64 >> It is the current amd64 kernel from Etch. > > Ok. One more question, is it using multiple CPU:s or something similar? Yes, /proc/cpuinfo shows two Intel Core 2 CPUs (T7200 @ 2.00GHz). >>> What kernel modules do you have loaded? >> The output of lsmod is attached. > > In the attached files I could not find any ppp module. I thought you > needed that for it to work. The only module related to network traffic > I found was e1000... Or is the ppdev the ppp module maybe? Sorry my bad, I accidentally lsmod'ed while disconnected from pptp. I've attached another lsmod made during a pptp session. This time ppp_mppe, ppp_async and ppp_generic are loaded as they always are when starting a pptp session. > Unfortunatly I do not think you can get any help from strace, or even > gdb. What you could use is the following: > * A tcpdump (on an external machine) to see exactly what traffic that > passes over the network just before the machine freezes. > * Some kind of kernel debug tool. I see what I can do, unfortunately I'm not very fit on kernel debugging or network sniffing. I could run a network sniffer on the router between the laptop and the internet if you could give me some basic jump start (which tool, which options, etc). > When the computer freezes. Do it totally freeze without any console > output or how do it behave? It freezes totally. The screen stays on (shows no errors or something, it's just frozen), the keyboard or mouse does not react. The only thing you can do is pressing the power button several seconds to shut down the machine the hard way. Cheers, Bastian -- Bastian Venthur http://venthur.de Debian Developer venthur at debian org
Module Size Used by arc4 6528 2 ppp_mppe 11528 2 ppp_async 16640 1 ppp_generic 33952 6 ppp_mppe,ppp_async slhc 11392 1 ppp_generic rfcomm 47912 0 l2cap 32512 5 rfcomm bluetooth 61572 4 rfcomm,l2cap nfs 236216 0 nfsd 256200 17 exportfs 10368 1 nfsd lockd 67600 3 nfs,nfsd nfs_acl 8320 2 nfs,nfsd sunrpc 166984 13 nfs,nfsd,lockd,nfs_acl ppdev 14088 0 parport_pc 41640 0 lp 17736 0 parport 44684 3 ppdev,parport_pc,lp button 12192 0 ac 10376 0 battery 15496 0 autofs4 27912 0 ipv6 285664 22 deflate 8576 0 zlib_deflate 24216 1 deflate twofish 47744 0 serpent 23168 0 aes 31040 0 blowfish 13312 0 des 21248 0 sha256 13312 0 sha1 7296 2 crypto_null 7296 0 af_key 43540 2 dm_snapshot 20664 0 dm_mirror 25216 0 dm_mod 62800 2 dm_snapshot,dm_mirror fuse 48944 0 speedstep_centrino 12448 2 freq_table 9728 1 speedstep_centrino cpufreq_ondemand 11920 0 ibm_acpi 32928 0 fglrx 463604 8 loop 20112 0 tsdev 13056 0 joydev 15360 0 irtty_sir 13440 0 sir_dev 22152 1 irtty_sir snd_hda_intel 23708 0 snd_hda_codec 184192 1 snd_hda_intel snd_pcm_oss 48672 0 snd_pcm 89096 3 snd_hda_intel,snd_hda_codec,snd_pcm_oss snd_mixer_oss 21888 1 snd_pcm_oss snd_seq_dummy 8580 0 snd_seq_oss 37248 0 snd_seq_midi 13632 0 snd_rawmidi 31392 1 snd_seq_midi snd_seq_midi_event 12544 2 snd_seq_oss,snd_seq_midi snd_seq 59520 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event snd_timer 29192 2 snd_pcm,snd_seq snd_seq_device 13204 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq nsc_ircc 28752 0 snd 65256 10 snd_hda_intel,snd_hda_codec,snd_pcm_oss,snd_pcm,snd_mixer_oss,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device ipw3945 205348 1 soundcore 15392 1 snd pcmcia 43672 0 irda 199660 3 irtty_sir,sir_dev,nsc_ircc i2c_i801 13076 0 psmouse 44432 0 snd_page_alloc 14864 2 snd_hda_intel,snd_pcm crc_ccitt 6784 2 ppp_async,irda i2c_core 27776 1 i2c_i801 serio_raw 12036 0 pcspkr 7808 0 yenta_socket 31884 1 rsrc_nonstatic 16384 1 yenta_socket pcmcia_core 47012 3 pcmcia,yenta_socket,rsrc_nonstatic evdev 15360 2 ieee80211 36680 1 ipw3945 ieee80211_crypt 11264 1 ieee80211 firmware_class 15616 2 ipw3945,pcmcia intel_agp 29248 1 ext3 138512 2 jbd 65392 1 ext3 mbcache 14216 1 ext3 ide_cd 45088 0 cdrom 40488 1 ide_cd sd_mod 25856 4 piix 15492 0 [permanent] ahci 24708 3 libata 106784 1 ahci scsi_mod 153008 3 sd_mod,ahci,libata ehci_hcd 36104 0 generic 11396 0 [permanent] ide_core 147584 3 ide_cd,piix,generic uhci_hcd 28696 0 e1000 123968 0 thermal 20240 0 processor 38248 2 speedstep_centrino,thermal fan 9864 0
