Debugging System Lockup

[Gary Jennejohn]

On Thu, 30 Jun 2016 16:02:30 -0700
Pete Wright <pete at nomadlogic.org> wrote:

> Hi All,
> 	I've been working with mmacy on testing the new i915kms support on
> skylake.  I've got a stubborn bug where I am able to trigger a hard-lock
> of my system requiring a manual power-off/power-on to get it back in
> working order.  Unfortunately, I have not been able to get any debugging
> information out of this system when this happens - no core, backtrace in
> dmesg buffer, etc.
> 
> I was hoping someone on this list has had experience in debugging
> situations like this and could offer some tips for trying to get useful
> info out of this crash.  I was going to configure my system to use
> dcons(4) - but this system does not have a fireware device, so that
> seems to rule out that avenue.  So any input would be really appreciated!
> 

Serial console?  Should even work well enough using a FTDI adapter.

-- 
Gary Jennejohn