AMT console

[Bengt Ahlgren]

Konstantin Belousov <kostikbel at gmail.com> writes:

> On Thu, Jun 20, 2013 at 09:16:19AM +0300, Konstantin Belousov wrote:
>> On Thu, Jun 20, 2013 at 12:20:27AM +0200, Bengt Ahlgren wrote:
>> > John Baldwin <jhb at freebsd.org> writes:
>> > 
>> > > On Thursday, June 13, 2013 10:00:21 am Ganael LAPLANCHE wrote:
>> > >> Hi,
>> > >> 
>> > >> As you may know, suspend/resume has been broken on Lenovo x220 for a
>> > >> long time now, see :
>> > >> 
>> > >> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/174504
>> > >> 
>> > >> I have been able to do a suspend(S3)/resume operation in text mode (it
>> > >> works, but console stays dark at resume, I had to connect through ssh ;
>> > >> also, resume hangs if X is started with i915kms.ko loaded) and collect
>> > >> the following verbose logs :
>> > >
>> > > Interesting, I connected a serial console via AMT but wasn't able to get
>> > > any output during resume.  Is this with a stock kernel?
>> > 
>> > Does the console via AMT otherwise work for you?
>> > 
>> > I'm trying to set up AMT as the console on a TP X201.  I got the serial
>> > over LAN working using amtterm from another machine - verified with cu
>> > on the tty (ttyu2) that typing on both ends shows up at the other end
>> > before trying console redirection.  The device is:
>> > 
>> > uart2: <Non-standard ns8250 class UART with FIFOs> port
>> > 0x1808-0x180f mem 0xf2524000-0xf2524fff irq 17 at device 22.3 on
>> > pci0
>> > 
>> > uart2 at pci0:0:22:3: class=0x070002 card=0x216217aa chip=0x3b678086
>> > rev=0x06 hdr=0x00
>> >     vendor     = 'Intel Corporation'
>> >     device     = '5 Series/3400 Series Chipset KT Controller'
>> >     class      = simple comms
>> >     subclass   = UART
>> >     bar   [10] = type I/O Port, range 32, base 0x1808, size  8, enabled
>> >     bar   [14] = type Memory, range 32, base 0xf2524000, size 4096, enabled
>> >     cap 01[c8] = powerspec 3  supports D0 D3  current D0
>> >     cap 05[d0] = MSI supports 1 message, 64 bit 
>> > 
>> > I've set:
>> > 
>> > hint.uart.2.flags="0x10"
>> > console="comconsole"
>> > 
>> > in /boot/loader.conf, but the loader just hangs after printing:
>> > 
>> > Loading /boot/defaults/loader.conf
>> > 
>> > Any advice?  Is uart2 unusable as a console?  It does not say "flags
>> > 0x10" in the device probe - does that mean it won't work?
>> 
>> You should use
>> comconsole_pcidev=0:0:22:3
> Oops,
> comconsole_pcidev=0:22:3

No difference, I'm afraid.  The port does not show up here either:

# sysctl kern.console
kern.console: ttyv0,dcons,/dcons,ttyv0,ucom,

Forgot to tell, but this is a 9.1-REL-p3/amd64 system running GENERIC.

(I wanted to set up the console for KMS shutdown and resume debugging.)

Bengt