Unresponsive BMC after booting into Ubuntu

[Andrei Kartashev]

Hi,
I had similar issue, but it was just "not loading some pages in webui
and doesn't response on ipmi commands", ssh and serial console used to
work. And yes, it appears after Linux boots on the host, but not with
Windows.
The root problem in my case was in PECI driver and power saving CPU
modes.
Here was the patch which solves the problem for me:
https://patchwork.ozlabs.org/project/openbmc/patch/e6f4ab29854ac58a878189c1edece4e8eed2e7fd.camel@yadro.com/

I'm not sure if it is your problem also, if you use dbus-sensors you
can check by stopping CPUsensor: 
	systemctl stop xyz.openbmc_project.cpusensor.service
If the problem gone after this, you got it =)


On Mon, 2020-11-23 at 22:49 +0000, Patrick Voelker wrote:
> I have a situation where, while booting the host into Ubuntu desktop
> 18.04, my OpenBMC ast2500 BMC stops responding on all interfaces
> including its debug serial console.  It doesn't do this when the host
> boots into Windows.
> 
> Nothing came up when I did an initial google search.  Also, nothing
> unusual jumps out at me if I watch the BMC's 'journal -f' prior to
> the issue.  No kernel panic or anything like that.
> 
> Are there any known issues like this?  If not, are there some
> pointers to relevant debug strategies for when BMC is not
> available?  I'd like to avoid JTAG debugging the kernel if
> possible.  :-)
> 
-- 
Best regards,
Andrei Kartashev