ethernet transmission speed is very slow

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Benjamin Eberhardt

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Oct 27, 2014, 9:08:28 AM10/27/14

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Hi all,

I bought my pandaboard back in 2012 and it was running well for more than a year with ubuntun 12.04 which canonical offered as a headless sd card image. One day after various upgrades to newer versions of ubuntu the system was getting super slow and showing many errors, commands failed, etc, so I decided to reinstall it. Since canonical was not offering images any more I tried both the ubuntu and debian builds from RC Nelson ( http://rcn-ee.net/deb/rootfs/ ). Currently I am using his latest Jessie image from August.

The main Problem that I still have across all these different versions and distributions is that somehow my ethernet throughput seems to be limited to about 10 kB/s. Receiving is (mostly) fine. I have some harddrives attached via usb and even tried a usb ethernet adaptor which worked for some hours but then also gradually decreased transmission speed until settling at about 10kB/s.

Is someone here familiar with this problem? There is very little information about this coming out of google, very few people seems to experience this problems and I tried every single hit they giving but with no luck so far. Switching back to ubuntu 12.04 is not really an option that I would like to take.

If you need more information let me know. I'd be very happy if somehow would know anything about this behaviour.

Thanks much,

Benjamin

Tom Mitchell

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Oct 27, 2014, 9:34:56 PM10/27/14

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No solid information... I am seeing periodic pauses that make

me wonder if a mutual exclusion lock chain is involved. I do

not see data loss.... In the past this type of thing vanished

after a kernel update or two.

I just did a live update of my pandaboard to the "latest" ubuntu

and found some graphics driver problems that I care less about

because I uses it via SSH.

I keep my data on a USB device and keyboard+mouse on a powered

USB hub. If the OS on the SD card needs refreshing I risk little or

nothing. Any setup is scripted and saved on the USB device.

A modest size SD card is so inexpensive that keeping a couple that

boot is a good idea.

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