AMT console

[Bengt Ahlgren]

Konstantin Belousov <kostikbel at gmail.com> writes:

> On Thu, Jun 20, 2013 at 08:20:14PM +0200, Bengt Ahlgren wrote:
>> 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,
> Obviously, you did not specified console=comconsole ?

It hangs with console=comconsole, so yes, that output was without it,
but everything else the same.

Bengt

>> 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.)