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I am running most recent version of Ubuntu (cannot remember exact xx.yy-zz). Anytime I use any bit of the networking devices, within the slightest amount of actual traffic the entire system dies. NumLock key light drops, entire system is unresponsive, only fix is a hard power off via power button (aka 5 sec hold in).
If there is anyway to produce an error log or record the commands as they happen please let me know. Rather new to the Linux systems, running for experience and better access to hardware actions than Winblows.
First thing to do would be to examine the logs -- specifically /var/log/kernel(.log) and maybe /var/log/messages(.log) if you have such a file. Look for events leading up to the "crash" to see if anything stands out as looking like bad news. Post the relevant pieces of log for us. Also please verify which Ubuntu it is, since that may be quite relevant (i.e. lucid lamprey, bony badger, etc.., or whatever it is called, OR the release version, i.e. 9.04, 9.10, 10.04, etc.).
Also, since it may come to this anyhow, please tell us about the machine and the hardware, i.e. what sort of computer is it (make/model/laptop/desktop?) and what sort of networking device(s) are involved (wired, ethernet, wireless, usb, PCI card? What make/model?) and what type of activity is going on, i.e simple web-browsing causes this? Or FTP file transfers for example.
Mar 25 18:58:20 hate kernel: imklog 4.2.0, log source = /var/run/rsyslog/kmsg started.
Mar 25 18:58:20 hate kernel: [ 0.000000] Initializing cgroup subsys cpuset
Mar 25 18:58:20 hate kernel: [ 0.000000] Initializing cgroup subsys cpu
Mar 25 18:58:20 hate kernel: [ 0.000000] Linux version 2.6.31-20-generic (buildd@palmer) (gcc version 4.4.1 (Ubuntu 4.4.1-4ubuntu8) ) #58-Ubuntu SMP Fri Mar 12 05:23:09 UTC 2010 (Ubuntu 2.6.31-20.58-generic)
Mar 25 18:58:20 hate kernel: [ 0.000000] KERNEL supported cpus:
Mar 25 18:58:20 hate kernel: [ 0.000000] Intel GenuineIntel
Mar 25 18:58:20 hate kernel: [ 0.000000] AMD AuthenticAMD
Mar 25 18:58:20 hate kernel: [ 0.000000] NSC Geode by NSC
Mar 25 18:58:20 hate kernel: [ 0.000000] Cyrix CyrixInstead
Mar 25 18:58:20 hate kernel: [ 0.000000] Centaur CentaurHauls
Mar 25 18:58:20 hate kernel: [ 0.000000] Transmeta GenuineTMx86
Mar 25 18:58:20 hate kernel: [ 0.000000] Transmeta TransmetaCPU
Mar 25 18:58:20 hate kernel: [ 0.000000] UMC UMC UMC UMC
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-provided physical RAM map:
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 0000000000100000 - 00000000bffb0000 (usable)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 00000000bffb0000 - 00000000bffbe000 (ACPI data)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 00000000bffbe000 - 00000000bfff0000 (ACPI NVS)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 00000000bfff0000 - 00000000c0000000 (reserved)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved)
Mar 25 18:58:20 hate kernel: [ 0.000000] BIOS-e820: 0000000100000000 - 0000000140000000 (usable)
Mar 25 18:58:20 hate kernel: [ 0.000000] DMI present.
Mar 25 18:58:20 hate kernel: [ 0.000000] AMI BIOS detected: BIOS may corrupt low RAM, working around it.
Mar 25 18:58:20 hate kernel: [ 0.000000] e820 update range: 0000000000000000 - 0000000000010000 (usable) ==> (reserved)
Mar 25 18:58:20 hate kernel: [ 0.000000] last_pfn = 0xbffb0 max_arch_pfn = 0x100000
Mar 25 18:58:20 hate kernel: [ 0.000000] MTRR default type: uncachable
Mar 25 18:58:20 hate kernel: [ 0.000000] MTRR fixed ranges enabled:
Mar 25 18:58:20 hate kernel: [ 0.000000] 00000-9FFFF write-back
Mar 25 18:58:20 hate kernel: [ 0.000000] A0000-BFFFF uncachable
Mar 25 18:58:20 hate kernel: [ 0.000000] C0000-D3FFF write-protect
Mar 25 18:58:20 hate kernel: [ 0.000000] D4000-EFFFF uncachable
Mar 25 18:58:20 hate kernel: [ 0.000000] F0000-FFFFF write-protect
Mar 25 18:58:20 hate kernel: [ 0.000000] MTRR variable ranges enabled:
Mar 25 18:58:20 hate kernel: [ 0.000000] 0 base 000000000 mask F00000000 write-back
Mar 25 18:58:20 hate kernel: [ 0.000000] 1 base 100000000 mask FC0000000 write-back
Mar 25 18:58:20 hate kernel: [ 0.000000] 2 base 0C0000000 mask FC0000000 uncachable
Mar 25 18:58:20 hate kernel: [ 0.000000] 3 disabled
Mar 25 18:58:20 hate kernel: [ 0.000000] 4 disabled
Mar 25 18:58:20 hate kernel: [ 0.000000] 5 disabled
Mar 25 18:58:20 hate kernel: [ 0.000000] 6 disabled
Mar 25 18:58:20 hate kernel: [ 0.000000] 7 disabled
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