Re: [9fans] Raspberry Pi 4 stability dependent in RAM

[hiro <23hiro@gmail.com>]

well they have FCC compliance, so i'd hope it's just internal
interference due to lack of rf separation on the board. unless the fcc
test is so busted that they were able to activate a less-problematic
pixel clock and never tried the full possible range? :D

since i don't have a github account i don't think they will listen to
me about my issues with the device.

but anyway they should hire an RF engineer and not me. if they tried
the common combinations at all they should have noticed themselves, no
?

i have been using 4k@60hz when i experienced my problem, bluetooth
cannot be switched to 5ghz.

i'm just happy it works at all, i was just gonna return it otherwise
like i did with the earlier rpi version. don't have time to make
bug-wishlists for future raspberry christmas trees (took them 8 years
already to make the first rpi with working ethernet+usb).

On 11/14/20, Bakul Shah <bakul@iitbombay.org> wrote:
> There were reports of 2560x1440 res generating RF noise in the 2.4GHz band
> wifi channel 1. The proposed solution (by Eben Upton) was to use channel 4
> or higher or use 5GHz wifi band at this res. And supposedly there is a
> firmware fix for this. No idea about the bluetooth issue. You should report
> these issues either on their forum or one of their github repos.
>
>> On Nov 14, 2020, at 7:14 AM, hiro <23hiro@gmail.com> wrote:
>>
>> well, for me hdmi reliably stops working when i turn on the bluetooth
>> keyboard and versa.
>> clearly RF interference was none of their concern when they made this
>> chip.
>> if your monitor suggests a different pixel clock you might get lucky
>> and it's just good enough, but your signal quality is gonna suffer no
>> matter what

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