Monday December 10, 2007
Bill Sommerfeld's WeblogStill Under Construction. Watch for falling objects configuring dhcp for almost-seamless use of nwam When I use my laptop at home at my desk, I usually have it plugged in to a port replicator. I have wireless but I need to plug in for power anyway. I finally got around to setting up the laptop to use the nwam phase 0 package to provide nearly seamless migration between wireless and wired network. The trick turned out to be to set CLIENT_ID in /etc/default/dhcpagent to the client id used by the wired interface -- 0x01 followed by the six-byte ethernet address. I suppose using the wireless interface's mac address would also work, but it's not soldered to the motherboard and might end up migrating to another laptop later.. When I undock to use the laptop in a different part of the house, nwam brings up the wireless and uses the same client ID with the wireless interface, and the DHCP server gives it the same address. There's a brief period of about 4 seconds when bits don't move, but no manual intervention (aside from the physical act of plugging/unplugging) is necessary. And when I bring the laptop back to my desk and plug it in, the reverse transition is also automatic. Very slick! Pippin opened last night. We were going along really well when, halfway through the first act, the casting holding the pivot & spring of my F-valve trigger popped off my bass trombone (a Conn 112H, which is an in-line double-valve instrument pitched in Bb/F/Gb/D); I'll note in passing for the benefit of non-trombonists that a Yamaha in-line double-valve bass trombone was the instrument mentioned in the well known but entirely apocryphal tall tale involving a Chilean bass trombonist, a firecracker, a mute, and the "1812" overture. (Now really -- what trombonist would ever use a mute in one of the few places in the symphonic literature where a quadruple forte (ffff) is written??!?!?!) Anyhow, after it popped off, the linkage and trigger hung down from the valve, occasionally getting tangled in my shirt pocket but fortunately keeping the valve stably "off" the whole time. So I was left with a Bb/Gb instrument. But whoever designed the instrument put in an extra-long tuning slide on the Gb valve so I could actually retune it down to F. Having learned the show using a bunch of alternate positions involving the use of the Gb valve, I played the rest of the show alternating the 2nd valve tuning. Definitely a higher-stress experience than I was hoping for, but it was an (unexpected) benefit of the in-line double-valve configuration that I hope I never need to rely on again... Aside from that, opening night went really well. And it's fixed already -- I'm extremely lucky that I live less than a mile from Osmun |
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