AMT console (was: Fixing suspend/resume on Lenovo x220)
Konstantin Belousov
kostikbel at gmail.com
Thu Jun 20 06:29:06 UTC 2013
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
Sorry.
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