This evening I was fooling around with this to see if I could uncover
any more clues (ie. I had noticed that music was usually playing when
the crash occurred so I tried unplugging it with different players
running in attempt to get it to crash again - but this was unsuccessful)
. I found out that it does not occur every time the network is
disconnected (description updated).
At the end of the night, I tried unplugging it and plugging it back one
more time (nothing happened) before I clicked Applications > Quit in
Xubuntu and clicked shutdown. After X closed, I was presented with
scrolling text that repeated the following:
"atkdbd.c: Spurious ACK on isa0060/serio0. Some program might be trying
to access hardware directly."
At the same time, the caps and scroll lock leds were flashing (like in
the other freezes). A fellow on IRC had suggested that I try a few
different key combinations with alt+ctrl+shift+sysrq+<blah> or something
to that effect and I tried it with b (which he told me, and which I
lated tried for myself to success, rebooted the system). At this time, I
was presented with something that looked like a traceback at the top of
the screen and two forward slashes at the bottom of he screen. The leds
had stopped blinking and no input was the keyboard seemed to register.
The traceback was as following (though I copied it by hand so there
might be some user errors):
[<d0c4c060>] device_cmp+0x0/0x50 [ipt_MASQUERADE]
[<d0c5c04d>] musq_inet_event+0x1d/0x20 [ipt_MASQUERADE]
[<c02e8655>] notifier_call_chain+0x25/0x30
[<c0131ab5>] blocking_notifier_call_chain+0x25/40
[<c02bfa4f>] __inet_del_ifa+0x11f/0x220
[<c02c0c6e>] devinet_ioctl+0x28c/0x6c0
[<x026e25f >] sock_ioctl+0xbf/0x210
[<c026ela0 >] sock_ioctl+0x0/0x210
[<c017eb0b>] do_ioctl+0x2b/0x90
[<c017ebcc>] vfs_ioctl+0x5c/0x2a0
[<c017ee8c>] sys_ioctl+0x5c/0x2a0
[<c0103116>] sysenter_past_esp+0x5f/0x89
[<c02e0033>] vcc_connect+0x1b3/0x580
===========================
I hope this helps and sorry if I cause you any due confusion and stress
is I made a typo in there! If the above incident is a separate bug,
please let me know and I'll create a new bug report.
--
System crashes if disconnected from network
https://launchpad.net/bugs/78841
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