Date: Sun, 4 Jan 2004 20:47:40 -0800 (PST) From: Doug White <dwhite@gumbysoft.com> To: Nate Lawson <nate@root.org> Cc: current@freebsd.org Subject: Re: Serial console only works after reboot? Message-ID: <20040104204700.J77465@carver.gumbysoft.com> In-Reply-To: <20040104150929.Y19715@root.org> References: <20040103184934.V16815@root.org> <20040103.201530.04738741.imp@bsdimp.com> <20040104150929.Y19715@root.org>
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On Sun, 4 Jan 2004, Nate Lawson wrote: > On Sun, 4 Jan 2004, M. Warner Losh wrote: > > In message: <20040103233044.N17367@root.org> > > Nate Lawson <nate@root.org> writes: > > : On Sat, 3 Jan 2004, M. Warner Losh wrote: > > : > In message: <20040103184934.V16815@root.org> > > : > Nate Lawson <nate@root.org> writes: > > : > : I have a laptop (IBM T23) and use sio0 as my console/gdb port. One thing > > : > : I noticed is if I power up the laptop and boot -h, I get garbage out the > > : > : serial port. However, if I boot fully and then just warm reboot, the > > : > : serial console works fine. I'm only using 9600 bps. Ideas? > > : > > > : > weird. Is the garbage data at some different rate? > > : > > : Nope, checked everything from 1200 up to 38400, different garbage but > > : always garbage. This is with -current as of 2003/12/30, no patches. > > > > Try 115200. > > That works. Now the question is "why". Note that I have no "options > CONSPEED" so according to /sys/dev/sio/sioreg.h, it should default to 9600 > and indeed does, after a reboot. But not on a cold startup. Are you setting BOOT_COMCONSOLE_SPEED anywhere? That also impacts the serial console speed setting. -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org
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