dwc_otg module causing the device to be unstable

[vadim@…]

Whenever I try to download any content at speeds more than a couple of hundred kbps from any source on the internet my fedora becomes unresponsive and even failing to respond to ping. I tracked down the issue and found out that dwc_otg kernel module is the cause. When I unload it the device is very stable, if I load it back and try to run a speed test or watch a video on youtube - it misbihaves.

[vadim@…]

Ok, this is only reproducible with a  Creative SB1170 Wireless Audio Transmitter attached to the USB port. Please note that the snd-* modules have nothing to do with that as I unloaded them all: # lsmod | grep snd | cut -f1 -d' ' | xargs rmmod

I tried running a longer download and monitor the device availability. Whenever I plug the card in it starts dropping packets, when I remove it - everything is back to normal.

[matthijs]

Apart from the instability, does the wireless audio device actually work?

[vadim@…]

Hi, sorry for the late answer. Yes the card works just fine. There are no audible artifacts in the audio stream on the analogical output nor wireless.

[matthijs]

Hi Vadmin, sorry for the long delay.

I'm wondering if this might be a power draw issue. Your audio device is a wireless transmitter, which might draw more power than the Fonera has available. Could you try connecting the device through a powered hub? For debugging, you should also try connecting it through an unpowered hub, see what that does.

[vadim@…]

Hi, unfortunately I already sold my Fonera. It was a great piece of hardware, but it couldn't do everything I expected it to so I replaced it with an atom based PC. Sorry I can't help.

[matthijs]

Since we can't reproduce this bug and it only occurs with very specific hardware, I'll close this report. If someone else runs into a similar problem, we can always have a closer look at this.

Note that we'll be updating the USB driver in the beta3 release, so perhaps that will fix this issue anyway.