[kwlug-disc] Raspberry Pi 4

[Doug Moen]

My take is that the USB-C standard is really messed up. The fact that it is so difficult to implement correctly is a warning sign. There was also that case of substandard USB-C cables sold on Amazon physically destroying your laptop when used for recharging.

https://arstechnica.com/gadgets/2016/02/google-engineer-finds-usb-type-c-cable-thats-so-bad-it-fried-his-chromebook-pixel/

On Sat, Aug 3, 2019, at 10:26 AM, Mikalai Birukou via kwlug-disc wrote:
> There is a saying: "Many problems have two solutions. One is obvious, simple and ... wrong."

> Apparently USB-C problem of putting analog circuit is a problem of this kind. There is a solution with one resistor instead of two (as article mentions) which incorrectness is not obvious (especially with blinding "we saved one resistor!"). Nintendo guys stepped into this. Raspberry guys stepped into this. And may be even Apple guys did with some of their dongles, as commented in Nintendo article https://arstechnica.com/gaming/2018/04/nintendo-warns-against-using-substandard-switch-charging-cables/?comments=1&post=35114343 .

> Being on a weekend, I am simply amazed at complexities present in this world, and that we, humans, are tackling them nevertheless. Wow!

> On 2019-08-03 10:07 a.m., CrankyOldBugger wrote:
>> I'm sure that we'll be seeing the Raspi 4 B v2 or something soon. They have good engineers working there.
>> 
>> 
>> On Sat, 3 Aug 2019 at 10:06, Mikalai Birukou via kwlug-disc <kwlug-disc at kwlug.org> wrote:
>>> This speaks to the power of open design: someone else found a bug and pointed it out.

>>> On 2019-08-03 12:13 a.m., Khalid Baheyeldin wrote:
>>>> Eben Upton confirmed that there are mistakes in implementing the standard(s) for USB-C.
>>>> 
>>>> https://arstechnica.com/gadgets/2019/07/raspberry-pi-4-uses-incorrect-usb-c-design-wont-work-with-some-chargers/
>>>> 
>>>> On Sat, Aug 3, 2019 at 12:09 AM CrankyOldBugger <crankyoldbugger at gmail.com> wrote:
>>>>> You need to watch what USB cables you use with the Raspi 4, though. Apparently the RP4 is having problems with smart cables: https://www.geeky-gadgets.com/raspberry-pi-4-usb-c-cable-issue-confirmed/
>>>>> 
>>>>> 
>>>>> On Fri, 2 Aug 2019 at 20:35, Mikalai Birukou via kwlug-disc <kwlug-disc at kwlug.org> wrote:
>>>>>> Raspberry PI 4 is coming out, with same arm cores as helm, but with 4GB of RAM. Finally USB 3, and dual HDMI.

>>>>>> https://www.tomshardware.com/reviews/raspberry-pi-4-b,6193.html

>>>>>> 

>>>>>> 
>>>> 
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>>> -- 
>>>  Mikalai Birukou 
>>>  CEO | 3NSoft Inc.
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> -- 
>  Mikalai Birukou 
>  CEO | 3NSoft Inc.
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