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by folays
Sun Dec 22, 2019 2:53 am
Forum: General discussion
Topic: New Pi 4B v1.2?
Replies: 331
Views: 53439

Re: New Pi 4B v1.2?

One person has now indicated that they have a RP4 with an apparently fully working USB C power input, not sure how word that correctly but you get my gist. https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=259629 They haven't confirmed that they have a v1.2 RP4 yet but it would seem likely. S...
by folays
Fri Dec 20, 2019 8:30 pm
Forum: General discussion
Topic: RPi 4 USB-C Power Delivery Seems Fixed
Replies: 31
Views: 10321

Re: RPi 4 USB-C Power Delivery Seems Fixed

Okay, found it ! I saw on https://www.scorpia.co.uk/2019/06/28/pi4-not-working-with-some-chargers-or-why-you-need-two-cc-resistors/ that CC1 and CC2 being connected together is the screw-up, but would best rephrased to " the problem is that they share the same set of resistances (R79 + R1) ". Especi...
by folays
Fri Dec 20, 2019 7:58 pm
Forum: General discussion
Topic: RPi 4 USB-C Power Delivery Seems Fixed
Replies: 31
Views: 10321

Re: RPi 4 USB-C Power Delivery Seems Fixed

With the « Anker PowerPort Speed+ Duo + USB-C charger cable (apple) », both idle or during a stress-ng (same result) : [email protected]:/home/pi# vcgencmd measure_volts usb_pd volt=1.6700V Video of the « original » (september 2019) RPi4 4GB, which did not work with USB-C PD charger, so that you can watch va...
by folays
Fri Dec 20, 2019 2:04 pm
Forum: General discussion
Topic: RPi 4 USB-C Power Delivery Seems Fixed
Replies: 31
Views: 10321

Re: RPi 4 USB-C Power Delivery Seems Fixed

I will try to take 2 close pictures of front and back area near the power input. Do you want another picture? Also, I could take my ampere-meter if you want me to test the Ohmic resistance of of one of the resistance. I do not have the time to research again what the problem were before with my init...
by folays
Fri Dec 20, 2019 10:10 am
Forum: General discussion
Topic: RPi 4 USB-C Power Delivery Seems Fixed
Replies: 31
Views: 10321

Re: RPi 4 USB-C Power Delivery Seems Fixed

What is the revision code in /proc/cpuinfo ? There is a v1.2 which has some minor changes to the PCB but no confirmation as to what has actually changed. [email protected]:/home/pi# cat /proc/cpuinfo processor : 0 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 108.00 Features : half thumb fastmult vfp ...
by folays
Tue Dec 17, 2019 7:56 pm
Forum: General discussion
Topic: RPi 4 USB-C Power Delivery Seems Fixed
Replies: 31
Views: 10321

RPi 4 USB-C Power Delivery Seems Fixed

Hi, I bought a RPi 4GB at kubii.fr on the 24th of June 2019, delivered on the 21th of September. My Pi had a solder problem on the SD card slot, which was loosening. They offered me a replacement. The previous (orignal) Raspi had power : - NOT working with USB-C PD power supplies : Macbook 12" 2015,...

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