The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

Tag: Rants

And kvetching, too

  • Mandatory Setup Slide for All Presentations

    Presentation Setup Slide
    Presentation Setup Slide

    When you put together a presentation, add this slide at the very end.

    Display it while you’re setting up the projector so you can make sure all the corners are on-screen, all the colors work, and that the circles are actually circular. Your audience will appreciate your consideration.

    The text font should be whatever you’re using for the main body text in the presentation. If you think the text I’ve used is too large, then you’ve never sat in the back of your own presentation…

    When you’re ready to start, whack the Home key and your regular title slide will appear.

    Here it is as a single-slide PowerPoint presentation, because WordPress doesn’t allow uploading OpenOffice ODP presentations. Copy the slide into your own file and let your audience move around accordingly.

  • Zero-dollar Power Screwdriver Repair

    I’m in the midst of cleaning up the shop after a winter of avoiding the too-cold basement. The best way I’ve found to pull this off is to pick up each object, do whatever’s needed to put it away, and move to the next object. Trying to be clever leads to paralysis, so I devote a few days to fixing up gadgets and putting tools back in their places. After a while, it gets to be rather soothing.

    Broken wire in power screwdriver
    Broken wire in power screwdriver

    Some months ago I snagged a power screwdriver from a discard pile; while it didn’t work, un-bending the battery pack connector solved that. It runs from a quartet of AA cells, which means I can use alkalines and it’ll always be ready to go. It’s not a high-torque unit, so I’m using it for case screws and similar easy tasks.

    But it quickly became intermittent and finally would turn only clockwise. Onto the to-do heap it went…

    Power screwdrivers consist of a battery, a motor with a planetary gear reduction transmission, and a cross-wired DPDT switch in between. Not much can go wrong and, if it turns at all, most likely the problem has something to do with the switch or wiring.

    Opened it up, pulled out the motor, and, lo and behold, one of the wires has broken off the switch. As nearly as I can tell, pushing the switch that-a-way forced the solder tab down on the wire and made the connection, pushing it the other way pulled the tab off the wire.

    While I had the hood up, I replaced the wires with slightly thicker and longer ones. Soldered everything back together, mushed the grease blobs back into the planetary gearing, and it works like a champ…

    Now, fairly obviously, there’s absolutely no economic sense to this sort of thing, given that the driver probably cost under ten bucks, but I just can’t stand to see a perfectly good gadget wind up in the trash.

    I’d love to do this sort of thing for a living, if only I could figure out how to avoid going broke while doing so. Maybe I can get me some of that my economic stimulus money that’s sloshing around these days?

  • Xubuntu Multimedia Keyboard Keys

    I still haven’t figured out why the audio volume & mute keys on my desktop box’s keyboard don’t work, but this process sets ’em up on my Dell Inspiron E1405 laptop… which I just reloaded with Xubuntu / XFCE 4.6 using more-or-less the procedure described starting there, including saving, blowing away, repartitioning, and restoring the Windows partition.

    If the audio mixer icon doesn’t show up on the top XFCE panel, other-click the panel -> Add New Items -> Mixer to get it there.

    Then do System Settings -> Keyboard -> Layout. Verify that you’re using the default system keyboard layout, as that’s what I’m doing on the laptop and it works. The desktop, now, that’s another matter; I think having two X sessions confuses it mightily.

    Then click the Application Shortcuts tab, click Add, and type in each of these…

    • amixer sset Master 10%+
    • amixer sset Master 10%-
    • amixer sset Master toggle

    For each command, click OK after typing. You’ll get another pop-up, at which point you press the corresponding volume / mute key.

    Note that the Master keyword is case-sensitive and may be something entirely different on your box. Use amixer to find out what you should be typing, thusly:

    amixer
Simple mixer control 'Master',0
  Capabilities: pvolume pswitch
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 31
  Mono:
  Front Left: Playback 27 [87%] [-6.00dB] [on]
  Front Right: Playback 27 [87%] [-6.00dB] [on]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 255
  Mono:
  Front Left: Playback 245 [96%] [-2.00dB]
  Front Right: Playback 245 [96%] [-2.00dB]
... snippage ...

    Shazam: audio control should then Just Work…

    The irony of having to futz around that much before having something Just Work is not lost on me. Really.

  • Xubuntu Install Tweaks: Fine Tuning

    After getting everything installed, there remains some fine tuning. These are some of the jots & tittles & glitches from my installation, in no particular order, which mostly apply to Xubuntu 8.10, but may also have something you need to know.

    Mplayer grumps about not being able to resolve IPV6 addresses. Add prefer-ipv4 = yes to /etc/mplayer/mplayer.config and it’ll be perfectly happy with plain old IPV4. Which is, of course, what essentially everybody uses. It’s not clear to me why Mplayer is the only program to fail this way, but that’s the story and it’s been that way for a long time.

    With compositing turned off, X doesn’t draw some OpenOffice menu & dialog items when it’s running on the right-hand portrait monitor. Turning the compositor on, however, reveals what an utter dud compositing is on a dual-core 2.8 GHz 1 GB box with an nVidia-flavored 9400 dual-head board. So turn compositing on, dial main windows back to opaque, allow shadows & transparency foo-foos only on small windows, and it’s pretty much bearable.

    But then the every pop-up window or dialog box displays weird trash from deep in the display buffer: icons, chunks of other apps, pure raw pinball panic, it all flashes before my eyes.

    Something in the X infrastructure interacts badly with the Mouse Gestures Redox Firefox add-on, but only on the left landscape monitor. Attempting a right-click-swipe-left to return to the previous page plunks a copy of the display that’s as wide as the portrait monitor on the left side of the landscape monitor, overlaying the live display beneath it. Minimize, restore, and the overlay is now dead black. The only way to get rid of it is to restart Firefox.

    Just exactly who do I file that bug with? The gestures extension? Firefox? Xubuntu? FXCE? X.org? Replacing it with FireGestures seems to work OK.

    The local CUPS server won’t display printers from the file server downstairs. Fix that by browsing to http://localhost:631, clicking the Administration tab, checking the Show printers shared by other systems box, and click Change Settings. Go brew up some tea or check your news feed; when you get back, all the network printers should appear when you click the Printers tab.

    Microsoft seems to have changed the definition of their keyboards such that the volume keys on a “Microsoft Comfort Curve Keyboard 2000 V1.0” don’t quite match the stock X layouts for MS multimedia keyboards, although msprousb seems close. More study is indicated. It’s not obvious how to link the keystrokes to the stock mixer, either.

    You can have only one mixer in the panel, aimed at one audio device, so adjusting a USB phone / headset will require some fiddling. A drop-down menu on the mixer main window permits setting other devices, but not from the panel.

    You can’t have menu / status panels on both monitors; you can only put either one on either monitor. Similarly, desktop icons must appear on both monitors; I think that’s ugly. So the only way to start programs on the “other” monitor is to either have duplicated icons or configure the Desktop settings to show the app menu on right-clicks, then scroll through it every time.

    Ctrl-Fnkey swaps workspaces; it’s even easier than point-and-clicking. Alas, you must have the same number of desktops on both screens and corresponding workspaces share the same name. All workspaces on a given monitor must have the same backdrop, so you can’t tell which one you’re on if there’s no program active: mouse-wheel scrolling gives you no hint which workspace you’re on.

    Alt-Tab clicks between active programs on the current monitor and sorts the programs in MRU order. Once you get used to it, you’ll love it.

    All in all, it does what I need.

  • Separate X Sessions Do Not Work in Kubuntu 8.10

    I sent this in as a bug to Launchpad, where it became Bug 337777 (not octal, BTW) and was marked as a duplicate of Bug 192413. It’s been triaged as Low priority, so I think my days of using KDE are, alas, pretty much finished.

    Herewith, the straight dope, just in case you were thinking of doing the same thing.

    ————-

    In Kubuntu 7.04, I managed to manually configure separate X sessions using two nVidia video cards driving two monitors. The setup involves a 1600×1200 landscape monitor on the left and a 1680×1050 monitor rotated 90 degrees CCW on the right.

    In Kubuntu 7.10, this worked reasonably well.

    In Kubuntu 8.04 / KDE3, this works poorly. X seems to regard the right-hand monitor as being 1600 (1680?) x 1200, so all windows maximize incorrectly and “centered” dialogs appear off-center to the upper right on that screen. I installed an nVidia-based dual-head card in the hopes that it would work better, but that made no difference. The setup is usable (I’m using it now), but not desirable.

    The automatic configuration tools fall flat on their face: any attempt to use the standard KDE display tools pooches xorg.conf. I must carefully tweak xorg.conf to keep this setup working in the face of any X changes.

    In Kubuntu 8.10 / KDE4.2, this configuration flat-out doesn’t work. After considerable manual fiddling, I got a blank X session on the right with the default X cursor and a black background; the mouse pointer moves from one screen to the other, but that’s as good as it gets. The left screen works more-or-less normally, but with some weirdnesses. Diligent searching reveals this is the common endpoint for all folks attempting this configuration: KDE4 simply doesn’t support separate X sessions.

    I do not want Twinview / Xinerama (which also work poorly for this configuration), because I typically edit a single document in portrait mode on the right screen while flipping between circuit simulators / web browsers / PDF documents / PCB layout editors on the left screen. A single X session using two screens does not support that functionality; particularly in KDE4 which seems to lack the advanced window positioning controls of KDE3.

    Because KDE4 is mandatory with 8.10, I can’t downgrade to KDE3, which might work.

    Although KDE4 seems to be the future, it would be immensely more usable if it didn’t introduce serious regressions from previous functionality. I will gladly trade off all the Plasmoid foo-foos and Compiz go-fast-stripes to get stable X capabilities that work the same way as 7.04.

    The to-be-expected alpha-version issues in 9.04 prevent me from even installing it at this point, so I cannot say whether it’s an improvement or not. From what I read in the forums, things do not look promising.

    Perhaps this is less of a “bug report” and more of a plea for stability: please, first make KDE4 *work*, then make it pretty!

    ————-

    For what it’s worth, I installed Xubuntu in that partition, added one line (Option “Rotate” “CCW”) to xorg.conf, and It Just Worked. XFCE is a bit lacking in creature comforts, but it works in this configuration. I think I can get used to that.

  • Verizon FiOS: What’s the Real Price?

    So FiOS has finally arrived here in the hinterlands and the latest teaser deal is $70/month for 10/2 Internet and anywhere-in-the-US VOIP. The ad mailers always tout the blazing speed (although that’s not what they offer in the teaser) and voice clarity.

    But there’s an asterisk: the prices are always “plus taxes and fees”.

    So I called the FiOS order line (877-896-2263) with two simple questions:

    • What, exactly, are those taxes and fees?
    • What, exactly, will they add up to each month?

    After five minutes of telling the nice man everything they already know about me and giving him permission to read their own records of our account, I managed to push him off his script long enough to get a word in edgewise.

    He tells me that the taxes and fees depend on my exact location and the services I sign up for. I point out that we’ve just established my address and he should know what services he’s offering, soooo what’s the price?

    We go around and around:

    • He says the only way to find out is to sign up and get my first bill
    • I refuse to buy something without knowing the price

    Eventually he offers to transfer me to billing, where he says (and I have no reason to doubt) that they’ll certainly tell me the same thing. Sounds like a good idea to me, if only to get to the next screen. He’s obviously miffed that I’m not following my lines in his script and just buying FiOS like a good sheeple.

    I hear the usual beeps & boops, a snippet of their on-hold blather, and dead silence. Ten seconds later, the call disconnects and I get the usual “If you’d like to make a call, please hang up and dial again” message.

    They don’t care. They don’t have to. They’re the phone company.

    Right now we’re getting 13/2 Internet from Cablevision (aka Optimum Online) for $50 and a Verizon landline for $25.

    Let’s see: slower Internet and marginally cheaper phone service, plus the asterisk. Not a compelling value proposition in our situation. But, then, we’re cheapskates.

    Incidentally, the “taxes and fees” make up $10.61 of this month’s $25.09 phone bill. I have good reason to believe that if we buy two services from Verizon, the fees will add up to $20 or so. But there’s no way to find out without buying them first, of course.

    I’m seriously thinking of killing the damn landline and struggling along with VOIP and our $5/month cellphone.

    Update: Today’s mail brings an even better teaser with a different phone number: 877-896-5322. It’s still $70/month for a one-year “agreement”, but now with free activation and a $100 cash card and they guarantee the rate for two years. The kickbacks push it just under $60/month for the first year. Still has that asterisk, though. Not to mention that the offers just keep getting better and better … I’m sure the early adopters are astonished at Verizon’s sliding incentive scale.

    Update 2: If you ignore the flyer and sign up for FiOS via the Verizon website, you get an additional $5/month off and you don’t have to deal with Verizon customer service. That brings it down to $55 plus the dreaded asterisk… I wonder what next month’s mail will bring?

    Update 3: Another flyer and the offer is still $70/month, free activation, and $100 cash back. Somehow I think FiOS uptake around here isn’t living up to their expectations.

  • Spam Proposition

    This flotsam recently washed over the railing. I added the bold highlight:

    Ladies and Gentleman.

    In order to have your company inserted into the registry of World Businesses for 2009/2010, please print, complete and return the enclosed form (PDF file) to the following address:

    WORLD BUSINESS GUIDE
    P.O. Box 2021
    3500 GA Utrecht
    The Netherlands

    register@ — .biz
    FAX: ++31 — — 8107

    Updating is free of charge

    Treating the attached PDF with the same casual nonchalance I use with any lump of high-level radioactive waste, I opened it in The GIMP (to strip any interesting PDF malware) and found an ordinary printable PDF form.

    Surprisingly, it didn’t have any slots for charge card or bank account info, but, down at the bottom, there’s a dense block of fine print.

    I ran it through pdftotext to get the raw text and here’s the kick in the head, boldified for your reading convenience.

    THE SIGNING OF THIS DOCUMENT REPRESENTS THE ACCEPTANCE OF THE FOLLOWING CONDITIONS AND THE CONDITIONS STATED IN “THE TERMS AND CONDITIONS FOR INSERTION” ON WEBPAGE: WWW.WORLD-BUSINESSGUIDE.COM. THE SIGNING IS LEGALLY BINDING AND GIVES YOU THE RIGHT OF AN INSERTION IN THE ONLINE DATA BASE OF THE WORLD BUSINESS GUIDE, WHICH CAN BE ACCESSED VIA THE INTERNET. A CD ROM WITH WORLDWIDE BUSINESSES IS GRANTED, ALL IN ACCORDANCE WITH THE CONTRACT CONDITIONS STATED IN “THE TERMS AND CONDITIONS FOR INSERTION” ON WEBPAGE: WWW.WORLDBUSINESSGUIDE.COM. THE VALIDATION TIME OF THE CONTRACT IS THREE YEARS AND STARTS ON THE EIGHTH DAY AFTER SIGNING THE CONTRACT. THE INSERTION IS GRANTED AFTER SIGNING AND RECEIVING THIS DOCUMENT BY THE SERVICE PROVIDER. I HEREBY ORDER A SUBSCRIPTION WITH SERVICE PROVIDER INTERNATIONAL DIRECTORIES LTD “WORLD BUSINESS GUIDE”. I WILL HAVE AN INSERTION INTO ITS DATA BASE FOR THREE YEARS. THE PRICE PER YEAR IS EURO 995. THE SUBSCRIPTION WILL BE AUTOMATICALLY EXTENDED EVERY YEAR FOR ANOTHER YEAR, UNLESS SPECIFIC WRITTEN NOTICE IS RECEIVED BY THE SERVICE PROVIDER OR THE SUBSCRIBER TWO MONTHS BEFORE THE EXPIRATION OF THE SUBSCRIPTION. YOUR DATA WILL BE RECORDED. THE PLACE OF JURISDICTION IN ANY DISPUTE ARISING IS THE SERVICE PROVIDER’S ADDRESS. THE AGREEMENT BETWEEN THE SERVICE PROVIDER AND THE SUBSCRIBER IS GOVERNED BY THE CONDITIONS STATED IN “THE TERMS AND CONDITIONS FOR INSERTION” ON WEBPAGE: WWW.WORLD-BUSINESSGUIDE.COM

    I haven’t checked out the full T&C, as I doubt I’ll benefit from such a listing.

    This probably works best in large organizations, where one sucker responds to the spam and then the billing department responds automatically to incoming invoices. The two-month advance notice is a really nice touch, isn’t it?

    Why do people continue to fall for this crap? If it didn’t pay off, the spammers would dry up and blow away, so there must be a fresh crop of suckers every day.

    People, stop doing that!

    Update: More on spam and what (not) to do: http://www.spamprimer.com/