5 ms·
> Because what if it's not? Then, after you done ruling out the most likely and easiest explanation to test, you can then start exploring the remaining possibi
by kingosticks 7y ago
> Because what if it's not?
Then, after you done ruling out the most likely and easiest explanation to test, you can then start exploring the remaining possibilities. Skipping to the more exotic explanations sounds more interesting but it's poor use of time if there's still low-hanging fruit out there.
- baq 7y agomaybe, with high frequency radios and improperly shielded cables and chips, the most likely scenario is RF interference?
- kingosticks 7y agoImproper shielding is an assumption with no evidence as yet. I also mentioned that the ease of verifying the explanation should be a factor. Changing software is usually very easy.
- baq 7y agowrapping tinfoil around an hdmi plug/cable isn't particularly hard either :) chips are harder but at least you rule out the cable. HDMI cables are ridiculously finicky if you've ever tried to get anything more than the lowest common denominator 1080p going on them.
- kingosticks 7y agoI don't agree that wrapping foil is a great way to 100% rule that out as there is room for error. Using different cables/dongles would be better and they already tried that.
- markus92 7y agoIt's so common that it's not an unlikely starting point. EMC is a major issue in high frequency electronics design and the raspberry pi had a history of having to redesign certain parts because of not having enough shielding.
- kingosticks 7y agoI can find [1] on the subject which is quite interesting. [1]: https://www.element14.com/community/people/PeteL/blog/2012/03/29/spikes-in-the-ether-emc-and-compliance https://www.element14.com/community/people/PeteL/blog/2012/0...
- markus92 7y agoSee also https://www.raspberrypi.org/blog/tag/ce-compliance/ https://www.raspberrypi.org/blog/tag/ce-compliance/
- kingosticks 7y agoThere doesn't seem to be much info on compliance out there for Pi 4 which must have been significantly different w.r.t HDMI.
- markus92 7y agoAbsolutely, and this was before the Pi had built-in Wifi. The norms you have to comply for are immediately a lot stricter as your device falls into a different category (telecommunications devices).
- mlyle 7y agohttps://twitter.com/assortedhackery/status/1200056633898029061 https://twitter.com/assortedhackery/status/12000566338980290... Evidence :P