Thank you for your response, I think I'm also in camp 2.El_Presidente wrote:I'm seeing two schools of thought currently on this and similar issues -holmez wrote:Any thoughts?
1) There appears to be a lot of problems with low quality hub and/or hub power supplies. Some hubs are not fully compliant with USB standards, others are just cheap tat that you can get away with on a PC but the Pi is more sensitive.
2) The fact that there are just so many problems and a number of users have taken the time to try multiple configurations of hub/ps/device, points to a possible lower level issue with kernel or USB drivers at the current early stage in the Pi story.
I'm in camp 2, although I do accept that you have to go through diagnosing step 1 and for some they do actually seem to fix things with a change of kit.
Also I want to add the comment that I have nothing but total respect for all parties involved in the birth and early stage nurturing of this beautiful thing that is the Raspberry Pi. I'm not criticising anyone at all, I'm just looking to help focus development effort where it might be needed.
I've an update:El_Presidente wrote:I'm guessing you are using an additional USB hub with your Pi.
You will likely get two forms of reply to your issue:
1) You have a power supply or hub quality issue. Most people are recommending power supplies for a powered hub need to be at least 1.5A, better at 2A+. Power needs to be stable in range 4.75v-5.25v across the TP1/TP2 power test points on the Pi board. The hub needs to be compliant with USB standards and many seem to break the rules. Check the Rpi Verified Peripherals list on the Wiki: http://elinux.org/RPi_VerifiedPeripherals
2) You could be seeing USB Kernel/Driver problems that more and more people are suspecting. Particularly if you have tried several hubs, power supplies, keyboards and mice and your voltage ratings appear solid. The Pi doesn't seem to like a mix of low/high power USB devices across it's USB channels and the mouse affecting networking (which appears when you load LXDE or other X) seems the most toxic.
Either one could be your problem, but the fact that different OS builds are showing different manifestations of this problem also hint at a greater underlying problem than bad components - do start by trying troubleshooting on item 1 and swapping out as many components for alternatives as you can. If you still have issues as I and many others do, you may want to add your support for the USB kernel/driver problem by posting back.
Best of luck.