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by SlySven
Thu Dec 20, 2018 5:22 am
Forum: Raspbian
Topic: Unable to install libgtk2.0-dev on Raspberry Pi 2
Replies: 13
Views: 4556

Re: Unable to install libgtk2.0-dev on Raspberry Pi 2

I too am getting this error on my Raspberry Pi B+ - it seems that there is a dependency on libcairo2-dev and that in turn depends on libcairo2 and libcairo-gobject2 both of the latter are install as version 1.14.8-1+rpi however the libcairo2-dev is version 1.14.8-1 and will only accept the 1.14.8-1 ...
by SlySven
Thu Dec 21, 2017 6:40 am
Forum: Advanced users
Topic: Raspberry Pi B+ turn usb power off
Replies: 46
Views: 84969

Re: Raspberry Pi B+ turn usb power off

There is a separate Github based project that is also working on software for the very small proportion of USB Hubs that actually meet the USB specifications about control of the power on their output/downstream ports. Take a look at uhubctl - I (and a Foundation engineer) helped them update their d...
by SlySven
Thu Jun 15, 2017 5:51 pm
Forum: General discussion
Topic: Is PerPort Power Supply to each USB port feasible (RPi Bs)
Replies: 4
Views: 1295

Re: Is PerPort Power Supply to each USB port feasible (RPi B

I can confirm that `uhubctl` does work as described (use port 2 to control ALL the usb downstream ports) at least on the 2B model. As jdb implied it does NOT work on models before (it seems) the B+ as my 1.2(?) B acknowledges the commands but does not do anything - which is consistent with the relev...
by SlySven
Mon Jun 12, 2017 7:50 pm
Forum: General discussion
Topic: Is PerPort Power Supply to each USB port feasible (RPi Bs)
Replies: 4
Views: 1295

Re: Is PerPort Power Supply to each USB port feasible (RPi B

USB hub port power control works on B+, 2B and 3B. The port VBus connections are ganged together and controlled by the USB overcurrent monitor chip. Ah, I was referring to Raspberry Pi R2.0 Schematics Issue 2.2 which has a bit more detail than the current offerings on the documentation > hardware >...
by SlySven
Mon Jun 12, 2017 3:38 pm
Forum: General discussion
Topic: Is PerPort Power Supply to each USB port feasible (RPi Bs)
Replies: 4
Views: 1295

Is PerPort Power Supply to each USB port feasible (RPi Bs)

I am guessing this is a No-Way-In-Hell option but it did come up as a subject on the GitHub "Usb Hub Control" software repository: Raspberry Pi 3 ? - all the "B" Model Pis have a USB hub IC built-in but none (currently) utilise the power switching control lines (PRTCTL# where # is a number) to allow...

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