Ive had my Pi for a week or so now and one of the very first and recurring problems I had with it is that, when I first connected a USB WiFi dongle (Belkin F5D7050 [Ralink RT2571W
] ), the Pi rebooted itself. Being a Linux newbie I assumed that I shouldnt have plugged it in while booted up, or that I should have set up the firmware and/or drivers etc first. I ignored the problem and I carried on with a wired connection and played with other things. It then happened when I connected a different usb WiFi dongle (Netgear WNDA3200 [Atheros AR7010+AR9280
]). It happens when plugged directly into either of the two USB ports, even now after I have all the firmware etc set up and I can
get a wireless internet connection. I just have to have the dongle plugged in while its booting.
It also happened when I tried an unpowered unbranded USB hub with only a mouse and KB attached. I assumed it wasnt supported as it wasnt on the list at http://elinux.org/RPi_VerifiedPeripherals
. The KB and mouse do no cause the reboot on their own. Ive just tried a random usb camera and an iPod directly connected and this does not reboot. Also just tried a handful of usb sticks. Some do cause reboot, some dont. Buffalo Ministation (HD-PF32OU2) randomly does.
I now have a powered Belkin hub that is supported and seems to be working well (it doesnt reboot when i plug/unplug it). The hub can power the Pi with no micro usb attached (which confused me at first!) though I always run with power to the Micro usb. It allows me to connect K/b, mouse, bluetooth, both the original wifi dongles and a new ASUS (N10 [Realtek RTL8188SU
] ). The Asus also reboots the Pi when connected directly (not through the hub).
Even with nothing attached and with the Pi sat at the terminal screen waiting for a log in, plugging in these devices forces the reboot.
What I'd like to know is:
Should I be able to plug/unplug any usb devices while the Pi is on?
Id like to have the Pi headless with the Asus dongle straight into the Pi, should this be possible with the option to plug/unplug whenever I might need to?
What are the possible causes for the reboot?
How do I check each possible cause off the list?
I seem to have various power combinations available:
Power from adapter to micro usb
Power from hub direct to usb A
Power from hub to micro but
plugging the usb A also provides power
Are there any unsafe
combinations to powering my Pi?
The Pi (rev2 code4) is powered from an Apple iPad charger 5.1V 2.1A.
Running official Raspbian wheezy.
Connected to: Wired Internet | Logitech Wired Mouse | Behavior Tech Wired KB | Belkin powered 7Port Hub | HDMI
Sorry for rambling!