• ls -l Shows Question Marks instead of Permissions

    Occasionally, when running ls -l within a directory, you might find that the output shows question marks (?) instead of the usual permissions indicators:

    ben@Queeg:~$ ls -l ~/test
    ls: cannot access /var/www/html/Vx/Notes: Permission denied
    total 0
    d????????? ? ? ? ? ? Notes
  • NTPD Refusing to accept time from GPSD

    One of the (minor) drawbacks of the Raspberry Pi is the lack of a hardware clock. Normally, you'd work around this by configuring a good pool of NTP servers to connect to. What do you do though, if you can't guarantee there will be an Internet connection available when needed?

    The solution is obvious, so obvious that many have already done it - use the time provided by a cheap GPS dongle. The gpsd daemon helpfully pushes the time to Shared Memory Segments (SHM) so it's a simple adjustment to the NTP configuration file to have NTPD pull the time from the dongle.

    Except, it seems on Raspbian, it isn't quite so simple. You've followed all the instructions (simple as they are) but are still seeing an entry like this

    # ntpq -p
         remote           refid      st t when poll reach   delay   offset  jitter
    ==============================================================================
    SHM(0)          .GPS.            0 l    -   16    0    0.000    0.000   0.001

    No matter what you try, reach stays at 0.

    Frustrating, and there's very little to give you a guide. This post will tell you what the issue is, as well as how to go about finding it should it re-occur

  • Republished: Battery Not Charging on SV650

    Originally published on Benscomputer.no-ip.org Feb 2009.

     

    This page is here as a reference for others experiencing the issues I have been having on my 2002 SV650-S lately.

    SYMPTOM: Battery not charging, so bike refuses to start every so often. Misfire in Idle range but not always on the same cylinder.

     

  • Using The Volvo 440 Diagnostic System

     

    The Volvo 440 dates back to an era where Car manufacturers were actually helpful (or at least some of them were), and as a result has a built in Diagnostic system. No going to the Garage to have fault codes read, so long as you know how to use the system.

    This article tells you exactly how to do just that!

  • Volvo 440: Voltage Decreases as Engine Speed Rises

    Having resolved the issue, it's a fairly garden variety fault, but I thought I'd document it in that the symptoms are almost exactly the opposite of what we expect to see when there's a fault with the charging system.

    Essentially, as the engine speed rises, the voltage (measured across the battery, or from anywhere else in the car) drops - and not just a little.