Date: Wed, 2 Aug 2006 14:47:01 -0700 From: Jo Rhett <jrhett@svcolo.com> To: Bruce Evans <bde@zeta.org.au> Cc: njl@freebsd.org, freebsd-gnats-submit@freebsd.org, freebsd-i386@freebsd.org Subject: Re: i386/100831: sio ignores BIOS information about serial ports - bounty offered Message-ID: <20060802214701.GE86509@svcolo.com> In-Reply-To: <20060803024810.X1573@epsplex.bde.org> References: <200607252036.k6PKanFd072593@www.freebsd.org> <20060731191302.S1172@epsplex.bde.org> <6EFF87DF-280C-402C-8C2A-10F3144CF41F@svcolo.com> <20060802205230.N90692@delplex.bde.org> <20060802234330.J1249@epsplex.bde.org> <20060802150656.GB47835@svcolo.com> <20060803024810.X1573@epsplex.bde.org>
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> >4. There should be no ill effect from doing this. Console will never break > >and go to the wrong port. > > > >#4 is crucial to us. Many of these machines are completely unavailable to > >me for an emergency. This console is our "last chance access" On Thu, Aug 03, 2006 at 03:25:28AM +1000, Bruce Evans wrote: > Yes, "should be". The wiring should be fairly deterministic once you > get it to work. I think it will continue to work even if someone fixes > (?) ACPI to prefer the hints order to the ACPI order. However, it would > break if someone fixes (?) ACPI to prefer the BIOS order to both the hints > order and the ACPI order (I think ACPI is using its own order and doesn't > know that you've swapped the order in the BIOS). Actually, it doesn't work right now. I just tested it. /boot/device.hints: hint.sio.1.flags="0x90" If you change the flags in device hints, the low-level (boot loader 2?) console gets moved to wherever you put the flags. So now I have the exact reverse behavior. The initialization part of the console goes to the wrong port, and then halfway through booting I suddently get console on the right port. I think I have to agree with Marcel on this -- device hints aren't used consistently, and having two different processes read it with two completely different interpretations of it is nonsense. I can't fix one without breaking the other. -- Jo Rhett senior geek SVcolo : Silicon Valley Colocation
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