AMT console (was: Fixing suspend/resume on Lenovo x220)

[Konstantin Belousov]

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
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 834 bytes
Desc: not available
URL: <http://lists.freebsd.org/pipermail/freebsd-acpi/attachments/20130620/68941c31/attachment.sig>