Re: another xen-kernel UEFI story

> Op 12 aug. 2021, om 18:56 heeft Gerd Hafenbrack <gerd.hafenbrack@gmail.com> het volgende geschreven:
> 
> Hello,
> 
> The ASUS P8H77M-Pro has an internal serial connector onboard. Lizbeth should get a DB9 male slot bracket with 10 pin internal connector and a null modem cable.
> 
> Regards, Gerd
> 
> On 2021-08-12 18:45, Roger Pau Monné wrote:
>> On Thu, Aug 12, 2021 at 03:52:55PM +0200, Lizbeth Mutterhunt, Ph.D wrote:
>>> 
>>> 
>>>> Op 12 aug. 2021, om 09:01 heeft Roger Pau Monné <royger@freebsd.org> het volgende geschreven:
>>>> 
>>>> Adding the freebsd-xen mailing list again.
>>>> 
>>>> On Wed, Aug 11, 2021 at 12:48:55AM +0200, Lizbeth Mutterhunt, Ph.D wrote:
>>>>> Op Tuesday, 10 August 2021 15:32:45 CEST schreef u:
>>>>>> On Tue, Aug 10, 2021 at 02:41:34PM +0200, lizbethmutterhunt@gmail.com
>>>>> wrote:
>>>>>>> Op Tuesday, 10 August 2021 09:38:58 CEST schreef u:
>>>>>>>> On Mon, Aug 09, 2021 at 05:23:27PM +0200, lizbethmutterhunt@gmail.com
>>>>> wrote:
>>>>>>>>> could someone pleas check this link:
>>>>>>>>> 
>>>>> https://forums.freebsd.org/threads/xen-kernel-doesnt-start-at-all.8155
>>>>>>>>> 6/
>>>>>>>>> 
>>>>>>>>> does anyone has another idea then duplicating CURRENT and RELEASE
>>>>> via
>>>>>>>>> Virtualbox or qemu?
>>>>>>>>> 
>>>>>>>>> XEN simply doesn't boot after setting xen_kernel on in
>>>>>>>>> /boot/loader.conf,
>>>>>>>>> we tried different ways but none worked. It's loading [text],
>>>>> [data],
>>>>>>>>> [syms] and the preconfig but afterwards there's just the
>>>>> reset-button
>>>>>>>>> option, because XEN doesn't boot.
>>>>>>>>> 
>>>>>>>>> any help appreciated!
>>>>>>>> 
>>>>>>>> Hello,
>>>>>>> 
>>>>>>> hello royger!
>>>>> hija!
>>>>> 
>>> Hello Roger!
>>> 
>>>>>>> 
>>>>>>>> There are a couple of things to look at, first of all, do you have a
>>>>>>>> serial console attached to the box?
>>>>>>> 
>>>>>>> I guess so, because there are two possibilities to start from via
>>>>> primary
>>>>>>> and secodary console!
>>>>>> 
>>>>>> The serial console is a port (usually a RS-232) on your box that you
>>>>>> attach a cable to and connect to another computer, so you can get
>>>>>> early text debug output:
>>>>>> 
>>>>>> https://www.computerhope.com/jargon/s/serial-console.htm
>>>>>> https://tldp.org/HOWTO/Remote-Serial-Console-HOWTO/intro-why.html
>>>>> Basically I know the RS-232 "live" in the 80s, and I was soldering a earth-
>>>>> cable to connect two PCs without any swith via a deviate of Midnight
>>>>> Commander. So first thought, enable serial port in bios; computer crashing
>>>>> at
>>>>> xen and crashes when allocating the re0. so disabled again!
>>>> 
>>>> I 'm afraid I'm a bit lost here, so your computer does have some kind
>>>> of serial port?
>>> 
>>> No, no RS-232 output of course but a parallel and serial console in the BIOS! I activated the serial port and got in troubles with booting; beasties logo has been disabled, so no boot menu to unset the xen_xernel at boot prompt. XEN never booted anyway.
>>> 
>>>> Do you mean that when you enable the serial port in BIOS (I assume a
>>>> Serial Over LAN)
>>> Yup!
>>>> the re0 network interface stops working.
>>> Yes, at the dhclient allocations it stops immediately with no output or debugger info at all. Also the keyboard was disabled and I couldn’t press CTRL+C for avoiding DHCPREQUEST.
>> I think it would be better to get Xen out of the picture here, and
>> initially focus on getting a serial console working with plain
>> FreeBSD.
>> Once you have that it should be trivial to attempt to boot
>> Xen and get the output on the serial, but first you need to have it
>> working properly with plain FreeBSD.
>> The handbook contains a good section about how to get it working:
>> https://docs.freebsd.org/en/books/handbook/serialcomms/#serialconsole-setup
>> But it seems like you will need some help from your hardware vendor in
>> order to figure out how to enable Serial Over LAN properly on the
>> firmware.
>> Note that you should be able to get the output of both the FreeBSD
>> loader and kernel on the serial console.
>> Regards, Roger.

Was big update on Mac beta 5 Monterey, no difference audio out doesn’t work. Heading over to BSD now and trying the link given with 10 IO PINS on one protocol bit, like tcp/ip always was. 

Lizbeth