Date: Sun, 18 Nov 2007 21:58:38 +0200 From: Andrei Kolu <antik@bsd.ee> To: freebsd-stable@freebsd.org Subject: Re: No kernel messages displayed during boot Message-ID: <200711182158.39392.antik@bsd.ee> In-Reply-To: <20071118190159.GA12962@tetsuo.karasik.eu.org> References: <20071118190159.GA12962@tetsuo.karasik.eu.org>
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Sunday 18 November 2007 21:01:59 kirjutas Dmitry Karasik: > Hello, > > My 6.2-STABLE crashed today, and when I rebooted it, a very strange effect > appeared: from the second the kernel took over, immediately after loading > all .ko files, no text was printed in the console. The system booted > though, and the next text was printed to the console was the login prompt. > The screen didn't went blank, just all kernel messages and output of > /etc/rc* wasn't there -- all was printed on the screen was FreeBSD boot > menu, and login prompt. > > I've re-run 'make installworld' and 'make installkernel' (as I had > leftovers from recent buildworld), - didn't help. I've tried to power down > the machine (suspecied video card trouble), I've resetted BIOS, I've even > disabled com port in BIOS (because the behavior looks like booting on > serial console) -- nothing, absolutely nothing changes it. > > When I tried to boot in single-user mode, the prompt was never displayed at > all, which fact indeed makes me think alogn the path of the wrong boot > console. I've removed /boot/loader.conf, and double-checked that > /boot.config isn't present - didn't help. > > My question is therefore, what cause of this effect might be? Or, if noone > would be able to answer this, how I would print messages from kernel (I'd > recompile it for that purpose) to identify which device it picked up for > console IO -- and especially, how I print that either to a file, or > directly to /dev/console? look at /boot/loader.conf #boot_mute="-m" # -m: Mute the console to suppress all console input and output during the boot.
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