The following is a list of specific Powered USB Hubs which appear to be fault-free. Because of this, and although many people have reported apple products to power their basic PI setup reliably, its still not an optimal choice for a PI system that uses power hungry USB devices. [email protected] USB 2.0 4 ports Hub M-HX30 2.0 4-port Verified Very small USB Hub. Model: mMini AC15. Output: 5 V, 3 A (max per port), 15 W max. For some reason, the gpsd daemon does not always start correctly on boot. Will work without hub if only device in USB ports.
Due to the limited available man power and the broad scope of the UVC specification, the Linux UVC project will concentrate the development efforts on video input devices, especially webcams. Revision is printed on PCB. rev. 1.0; should work with 3.2+ kernel, need confirmation. rev. 2.0; works with kernel 3.6.11, without a powered hub. See Hans de Goede’s post on the linux-uvc-devel mailing list for more information. The PSU for the hub is a 2.5A 5v made in china. This can sometime lead to the camera failing to be recognized by the kernel.
Linux UVC driver & tools Introduction Welcome to the USB Video Class Linux device driver home. Model: PSAC09R-050. Output: 5 V, 1.8 A, microUSB. Digi-key Link Pi Supply PortaPow PortaPow UK Mains Wall Power Supply PowerGen PowerGen Dual Port USB 2.1A 10W AC Travel Wall Charger. The Pi Hut Trendnet  TU2-700 7 Port Powered USB 2.0 Hub with AC Adapter (5 V 2 A) Tripp-Lite  U222-007-R 7 Port Powered USB 2.0 Hub with AC Adapter (5 V 2.5 A) Powering Raspberry Pi from the hub works.