Date: Sun, 4 Jan 2004 15:10:41 -0800 (PST) From: Nate Lawson <nate@root.org> To: "M. Warner Losh" <imp@bsdimp.com> Cc: current@freebsd.org Subject: Re: Serial console only works after reboot? Message-ID: <20040104150929.Y19715@root.org> In-Reply-To: <20040104.003330.54786488.imp@bsdimp.com> References: <20040103184934.V16815@root.org> <20040103.201530.04738741.imp@bsdimp.com> <20040104.003330.54786488.imp@bsdimp.com>
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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. -Nate
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