Re: Debugging kernel lockups

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On Jun 25, 2012, at 8:17 AM, Tom Cook wrote:

> Hi,
> 
> Sorry for asking newbie questions here, but I'm, well, a newbie at
> this.  I'm trying to get the 3.2.20-rt32 patch to boot on a Raspberry
> Pi, but it seems the patch breaks the SD/MMC card driver and so the
> root filesystem can't be mounted.  I've built a 3.2.20 source tree and
> it boots fine, then I apply 3.2.20-rt32 patch and the boot halts
> trying to find the SD card for the root FS.
> 
> I'm not too worried about trying to debug / fix this, but I don't
> really know where to start.  Can someone give me some pointers towards
> how to track this sort of thing down?  Is kdb the right tool for the
> job?


Can you capture a serial console log of the boot process?

Thanks

Sven
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