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USB discussions getting a bit heated

e14 Contributor

On the other forum, discussions of USB and networking problems have been

getting a bit heated recently, with one user, Sulge, banned yesterday by abishur

for a 1-week cooling off period.  Maybe we will see him here soon.

 

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=12097&start=177

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=24&t=14151

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=5249

 

Some of the USB issues are being blamed on Linux latency, which

doesn't sound easy to fix.

Parents

  • I'm seeing a lot of USB problems being reported at raspberrypi.org forum, especially with powered hubs.  It might just be my imagination and/or more new users coming up with new failure modes, but there seems to be a higher concentration of USB hub problems.  I wonder if they're caused by recent changes to the "blessed" operating system?

     

    I think I'll stick with Debian "Squeeze" 6-19-04-2012 for now until this gets resolved.

  • in reply to johnbeetem

    John Beetem wrote:

     

    I'm seeing a lot of USB problems being reported at raspberrypi.org forum, especially with powered hubs.  It might just be my imagination and/or more new users coming up with new failure modes, but there seems to be a higher concentration of USB hub problems.

     

    Interesting.

     

    The original goal in my hub + RF mice tests (which you've already seen) was to find a combination of common generic USB devices including an RF mouse that would work correctly with 100% reliability with my Pi, since I wanted to draw a line under the commissioning phase and start developing something useful with the board.

     

    It didn't turn out that way, because my Pi doesn't work correctly with any combination of my generic RF mice and my generic well-known hubs.  As a result, the tests turned into a black/white sanity check for Pi USB operation, which wasn't the original goal.  None of my RF mice work at all in a hub, so I'm left with my original wired USB HID devices which "work" but suffer event or data loss every now and then.  To be blunt, I do not have a properly working Pi system, regardless of what I use.

     

    It's worth pointing out that RPF themselves recommend using self-powered hubs with the Pi to overcome power supply problems, but even if they didn't, correct handling of devices plugged into downstream hubs is a required part of USB operation, so we're faced with a major hard fault here.  Even the partial data loss that is so common is a hard fault.

     

    USB data loss is harder to quantify since it's not black/white, but I recall some company that produces USB devices measuring this with good instrumentation and reporting the problem to the RPF forum.  Is the Foundation responding to those technical posts?  (And I don't mean by banning ...)

     

    Morgaine.

  • in reply to morgaine

    Morgaine Dinova wrote:

     

    USB data loss is harder to quantify since it's not black/white, but I recall some company that produces USB devices measuring this with good instrumentation and reporting the problem to the RPF forum.  Is the Foundation responding to those technical posts?  (And I don't mean by banning ...)

    I don't know, but I think I hear classical music in the distance...  image

  • in reply to johnbeetem

    John Beetem wrote:

     

    I don't know, but I think I hear classical music in the distance...  image

     

    That's the big problem, isn't it.  The Foundation's concept of "community interaction" is one-way, and most of the time violins are involved.

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