Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 6 Aug 2003 22:25:33 -0700 (PDT) | Subject | Re: Newbie debugging question | From | "Randy.Dunlap" <> |
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> Hi, > > I've been searching the net for quite some time now without success so I > decided to ask the professionals. I'm looking for kernelhacker newbie > friendly documentation on how to figure out a little more about a kernel > lockup to be able to give the developer of a device driver some more info.
I suggest asking on the kernelnewbies mailing list (see kernelnewbies.org). Also, some people started on this web page, but it's only a beginning: http://lse.sourceforge.net/debugging/
> The problem is that after a while the machine locks up with Caps Lock and > Scroll lock blinking. I don't see any logs and no messages on the console. I > found some posts describing similar events and it was said that the kernel > is not completely dead in this state. Is there a way to get some more > information? Where should I start reading. > > Please CC me since I'm not subscribed.
What kernel version? That would have some effects on the answer.
Serial console is the usual option/route. If it boots completely, you could also try netconsole (or, dare I say it, usb console). Or LKCD (lkcd.sf.net), or kmsgdump (2.5.75/2.6.0 at http://www.xenotime.net/linux/kmsgdump/2.5.75/).
~Randy
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