[Arm-netbook] Performance problems with wifi on the Mele-A2000

[Jari Helaakoski]

Hi,

2013/3/23 Stefan Monnier <monnier at iro.umontreal.ca>

> I've been having performance problems with the wifi connection of my
> Mele-A2000 and have finally got around to try and track it down.
> I thought at first it was a problem with the 8192cu driver in my (stock
> Android) firmware (e.g. its reporting large amounts of dropped RX), but
> it seems like this is not the problem.
>
> The symptom:
> TCP connections (e.g. rsync-over-ssh) between the Mele and other
> GNU/Linux machines on my home 11g-with-wpa2 wifi tend to be *very* slow
> (while the speed can go up to around 1MB/s occasionally it often crawls
> below 100KB/s), and while such a transfer is on-going interactive SSH
> sessions between those same two machines are barely usable, sometimes
> waiting tens of seconds after each key to see it echoed back on screen.
> Sometimes the communication completely freezes for a minute or so.
>
> This happens with the stock Android 4.0.4 firmware (running kernel
> "3.0.8+").  It also happens with the kernel 3.4.29 from the Fedora-18
> boot image.  And it also happens with that kernel-3.4.29 using an
> external USB dongle (using the rt2800usb driver).
>
> During those events, the Mele is mostly idle, and neither dmesg nor
> syslog shows anything enlightening.  And the wifi network is also mostly
> "idle" (and communication between other GNU/Linux machines on that
> network never display such behavior).
>
> In all those cases I'm using the userland is a Debian testing
> distribution, installed in the /dev/sda1 partition of my HDD (in the
> case of the stock Android, it's running in a chroot on top of Android).
>
> I'd appreciate some help trying to fix this problem (this Mele is meant
> as a home server, so wifi connectivity is very important), or at least
> some help tracking it down.
>

You could try this if it helps:  http://linux-sunxi.org/Wifi

-Jari
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