Additional info... The beginnign of the kernel log, not reported before, shows:
Jun 2 09:00:20 mini-0 kernel: [55560.272000] UDP: bad checksum. From 213.157.218.54:0 to 186.176.90.47:0 ulen 1430 Jun 2 09:55:57 mini-0 kernel: [58896.588000] UDP: bad checksum. From 218.95.142.2:0 to 186.176.90.47:0 ulen 1430 Jun 2 11:22:06 mini-0 kernel: [64065.680000] UDP: bad checksum. From 186.32.0.99:53 to 186.176.90.47:44352 ulen 170 Jun 2 14:16:34 mini-0 kernel: [74533.544000] UDP: bad checksum. From 186.32.0.99:53 to 186.176.90.47:49396 ulen 136 Jun 2 14:16:40 mini-0 kernel: [74539.976000] UDP: bad checksum. From 186.32.0.99:53 to 186.176.90.47:47340 ulen 187 Jun 2 14:17:02 mini-0 kernel: [74561.496000] UDP: bad checksum. From 186.32.0.99:53 to 186.176.90.47:52383 ulen 154 Jun 2 14:34:16 mini-0 kernel: [75596.068000] UDP: bad checksum. From 186.32.0.99:53 to 186.176.90.47:33701 ulen 126 Jun 2 16:26:34 mini-0 kernel: [82334.040000] UDP: bad checksum. From 186.32.0.99:53 to 186.176.90.47:54904 ulen 125 Jun 2 16:43:35 mini-0 kernel: [83355.312000] UDP: bad checksum. From 186.32.0.99:53 to 186.176.90.47:52201 ulen 282 Jun 2 16:57:04 mini-0 kernel: [84163.824000] ------------[ cut here ]------------ Jun 2 16:57:04 mini-0 kernel: [84163.824000] WARNING: at /build/buildd-linux_3.8.13-1-mipsel-XrCEF3/linux-3.8.13/net/sched/sch_generic.c:254 dev_watchdog+0x180/0x2b0() Jun 2 16:57:04 mini-0 kernel: [84163.824000] NETDEV WATCHDOG: eth1 (MOSCHIP usb-ethernet driver): transmit queue 0 timed out Jun 2 16:57:04 mini-0 kernel: [84163.828000] Modules linked in: cpufreq_stats cpufreq_userspace cpufreq_conservative cpufreq_powersave nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc ipt_MASQUERADE ipt_REJECT xt_tcpudp xt_conntrack iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_filter ip_tables x_tables autofs4 loop fuse snd_cs5535audio snd_ac97_codec snd_pcm_oss snd_mixer_oss mcs7830 usbnet snd_pcm snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq r8169 rtc_cmos snd_seq_device mii ehci_pci snd_timer ohci_hcd ehci_hcd snd loongson2_cpufreq usbcore soundcore usb_common ac97_bus Jun 2 16:57:04 mini-0 kernel: [84163.840000] Call Trace: Jun 2 16:57:04 mini-0 kernel: [84163.840000] [<ffffffff8068e5fc>] dump_stack+0x8/0x40 Jun 2 16:57:04 mini-0 kernel: [84163.840000] [<ffffffff80229680>] warn_slowpath_common+0x78/0xa4 Jun 2 16:57:04 mini-0 kernel: [84163.844000] [<ffffffff80229754>] warn_slowpath_fmt+0x38/0x50 Jun 2 16:57:04 mini-0 kernel: [84163.844000] [<ffffffff805c8240>] dev_watchdog+0x180/0x2b0 Jun 2 16:57:04 mini-0 kernel: [84163.844000] [<ffffffff80238018>] call_timer_fn+0x84/0x164 Jun 2 16:57:04 mini-0 kernel: [84163.844000] [<ffffffff80239110>] run_timer_softirq+0x20c/0x2a4 Jun 2 16:57:04 mini-0 kernel: [84163.848000] [<ffffffff80231c18>] __do_softirq+0x124/0x288 Jun 2 16:57:04 mini-0 kernel: [84163.848000] [<ffffffff80231e48>] do_softirq+0x44/0x68 Jun 2 16:57:04 mini-0 kernel: [84163.848000] [<ffffffff802320ac>] irq_exit+0x4c/0xcc Jun 2 16:57:04 mini-0 kernel: [84163.852000] [<ffffffff8020419c>] ret_from_irq+0x0/0x4 Jun 2 16:57:04 mini-0 kernel: [84163.852000] [<ffffffff80477288>] arch_local_irq_save+0x0/0x28 Jun 2 16:57:04 mini-0 kernel: [84163.852000] [<ffffffff802963f4>] rcu_idle_exit+0x1c/0xb4 Jun 2 16:57:04 mini-0 kernel: [84163.852000] [<ffffffff80206560>] cpu_idle+0x68/0x80 Jun 2 16:57:04 mini-0 kernel: [84163.856000] [<ffffffff80868a6c>] start_kernel+0x470/0x49c Jun 2 16:57:04 mini-0 kernel: [84163.856000] Jun 2 16:57:04 mini-0 kernel: [84163.856000] ---[ end trace 18e9d7175962fe44 ]--- Jun 2 17:28:23 mini-0 kernel: [ 0.000000] Initializing cgroup subsys cpuset Jun 2 17:28:23 mini-0 kernel: [ 0.000000] Initializing cgroup subsys cpu Jun 2 17:28:23 mini-0 kernel: [ 0.000000] Linux version 3.8-2-loongson-2f (debian-ker...@lists.debian.org) (gcc version 4.7.3 (Debian 4.7.3-3) ) #1 Debian 3.8.13-1 Perhaps the important part is the netdev watchdog. I performed several pings to external URLs to see if I had external connection, but none of the pings was responded back, all packets were reported lost. That's how I realized the network device was hanging, or no longer working... -- Javier. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
