How to diagnose system freezes?
Steve Parker
sparke5509 at rogers.com
Thu Sep 8 12:23:48 UTC 2005
On Fri, 26 Aug 2005 23:43:25 +0200, Michael Schwendt wrote:
On Fri, 26 Aug 2005 13:40:27 -0400, Steve Parker wrote:
> Hi,
>>
>> I'm running FC4 (with all updates) and I'm frequently experiencing total
>> system freezes (i.e. my only option is to reset). I highly suspect this
>> has to do with a third-party kernel module (Contivity VPN client v3.3
>> from Apani) as it seems to occur only when the VPN connection is active
>> - even though the modules are always loaded.
>>
>> With no errors/messages in any of the system logs following a freeze
>> (crash, lockup, insert-your-favorite-word-here), how does one go about
>> diagnosing a problem like this? It seems to be a common problem for
>> many people (at least on fedoraforum.org). Anyone? Help would be
>> greatly appreciated. Is it worth submitting a bug to bugzilla if the
>> Contivity modules are suspected?
For starters: look into enabling System Request keys, and see
whether you can get a reaction. Also keep running the machine with
the screen displaying the primary virtual console to see whether
anything is logged there. -- Michael Schwendt <mschwendt at users.sf.net>
Well, I've gotten the System Request keys enabled (thanks Michael, cool
feature!) but, so far, the only resolution action that seems to respond
is (b)oot; sync and re-mount as read-only don't seem to function. I can
also do memory dumps and task lists but I don't know what I should be
looking for. Any hints? Any other tracing actions I can take? Thanks
again, Steve
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