Date: Sun, 23 Aug 2009 17:18:39 -0400 From: Carl Chave <carl@chave.us> To: Thomas Backman <serenity@exscape.org> Cc: Tim Judd <tajudd@gmail.com>, freebsd-questions@freebsd.org Subject: Re: Serial console trouble: loader and login works, but no kernel messages Message-ID: <eaba3b490908231418w61bb1ac7w94a5fa9e93027627@mail.gmail.com> In-Reply-To: <6CB09DDE-ED11-46B7-B1BE-B2DE27C5572C@exscape.org> References: <2E76B1A5-C7B3-4845-9919-1C9FFC7EDA63@exscape.org> <ade45ae90908231125i77a0c552qcfa36f03188972de@mail.gmail.com> <6CB09DDE-ED11-46B7-B1BE-B2DE27C5572C@exscape.org>
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Did you try booting with the keyboard disconnected from the FreeBSD machine? Perhaps the vidconsole is favored when a keyboard is detected? On a linux box I had, I would get serial output from Grub, lose it during kernel load and then get a login once the OS was up, much like what you describe. I had to add a kernel argument to my Grub config so the kernel would output to the serial port. Did you look here: http://www.freebsd.org/doc/en/articles/console-server/freebsd.html I think 7.2 might be what you are missing but I can't check it myself. On Sun, Aug 23, 2009 at 3:13 PM, Thomas Backman<serenity@exscape.org> wrote= : > > On Aug 23, 2009, at 20:25, Tim Judd wrote: > >> On 8/23/09, Thomas Backman <serenity@exscape.org> wrote: >>> >>> First off: Not subscribed to this list, please make sure to Cc me if >>> you don't reply directly. :) >>> >>> Anyway, I finally got my null modem cable, and plugged in in between a >>> machine running 8.0-BETA2 and one running WinXP using Hyperterminal. >>> >>> My settings: >>> >>> /boot/loader.conf: >>> boot_multicons=3D"YES" >>> boot_serial=3D"YES" >>> comconsole_speed=3D"115200" >>> console=3D"comconsole,vidconsole" >>> >>> /etc/ttys: >>> # Serial terminals >>> # The 'dialup' keyword identifies dialin lines to login, fingerd etc. >>> ttyu0 =A0 "/usr/libexec/getty std.115200" vt100 =A0 on secure >>> >>> /boot.config (which is read properly): >>> -Dh -S115200 >>> >>> Anything wrong in the above? >>> Hyperterminal is set to 115200 bps, 8 bits, no parity, 1 stop bit, and >>> no flow control (if that's the correct translation to English). >>> >>> On the serial console, I go from the screen with the FreeBSD logo, >>> with single-user options etc. (which works fine), and then nothing, >>> until a login tty pops up (which also works fine). The main, if not >>> only, reason I want a serial console is to be able to use it for >>> single user mode, DDB, and so on. >>> All kernel messages, and all rc messages are seen only on the graphics >>> card; the serial console receives nothing but the "/boot.config: - >>> Dh ...", the logo screen, and then the login screen, during startup >>> and *nothing* at all during shutdown. Also, I'm able to login and use >>> the system both via the serial console and via the graphics card/ >>> keyboard... Is this supposed to be? I'm not complaining, I just got >>> the impression it was one or the other. >>> >>> Any advice on how to get the kernel/rc messages etc. to the serial >>> console (only or as well)? >>> >>> Regards, >>> Thomas >> >> >> Do you use the VGA/vidconsole at all? >> >> A serial-only device (think soekris, ALIX/WRAP boards) that has no VGA >> will have different requirements than a serial-only device will. >> >> Your loader.conf statements are different than mine in the definition >> that you have more than I do to enable serial. >> >> My loader.conf just has one statement: >> =A0console=3D"comconsole" =A0- to feed ALL bootloaders, kernel probing, = rc >> startup on the serial device. =A0/etc/ttys defines the login lines. >> >> Though trial and error, I found when you use a dual-setup: >> "comconsole,vidconsole", the first one (comconsole) will get rc >> output, and vidconsole won't. >> >> Of course, you're on 8.0 and I don't run BETAs. =A0So the 8.0 BETA might >> still be having com port oddities, plus I noticed your ttys line is >> ttyu0, not ttyd0. =A0Did 8.0 change the serial line device? >> >> >> >> To enable a serial-only device in my setups: >> /boot/loader.conf: >> =A0console=3D"comconsole" >> >> /boot.config: >> =A0-D >> >> /etc/ttys: >> # enable serial line, cons25 or vt100, depending if I'm originating >> from a bsd or windows box. >> >> >> >> Enabling dual-setups should be just the loader.conf change to dual >> console. >> >> >> HTH > > > (Sorry for the lack of inline replies.) > > I do have a graphics card, and ideally I'd like to be able to use both, b= ut > serial has higher priority (with serial access, I can use minicom on anot= her > *nix box and essentially ssh into DDB, and stuff like that - right now I > have to borrow a monitor, and write info down manually if needed, turning= my > head back and forth). > > I've tried lots of combinations of console=3D, including simply > 'console=3D"comconsole"' and/or combinations of that and -D, -h- -Dh and = -P in > /boot.config. > The extra lines in loader.conf are from the handbook, which says they're > needed to use comconsole_speed. It seems they do the same thing as -D and > -h, though. > > Oh, and re: /etc/ttys: Yup, it's ttyuX when using uart(4) which seems to = be > the default now. Actually, since my last buildworld half an hour ago I'm = on > 9.0-CURRENT. ;) > Also, I made sure to set flags to 0x10 for the serial port as per the > handbook (although I did it using loader.conf, not the kernel config); > before the change, dmesg didn't mention any flags, but it now does. Didn'= t > help squat, though. > > "Though trial and error, I found when you use a dual-setup: > "comconsole,vidconsole", the first one (comconsole) will get rc > output, and vidconsole won't." > This doesn't mirror my experience; comconsole and comconsole,vidconsole > appears to be just the same for me. I've never gotten anything except the > boot loader and a login prompt over to the serial line - at least not at > speed/settings that the client is set up to receive. > > I'm gonna try 9600 bps soon just to be sure it isn't that, but seeing how > many others have mentioned using "-S115200" I doubt it'll help. > > Thanks/regards, > Thomas > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.o= rg" >
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