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by amgrays
Wed Dec 04, 2019 10:51 pm
Forum: Troubleshooting
Topic: Pi 4 4GB- Wifi not working when resolution is set too high
Replies: 75
Views: 7519

Re: Pi 4 4GB- Wifi not working when resolution is set too high

deralbert wrote:
Wed Dec 04, 2019 10:19 pm
None of this actions helped me, I can not connect to the 5ghz network.
Suggest:
1) Do you have anything connected to USB3?
2) Try REALLY low resolution - easiest way is put following line in config.txt:

Code: Select all

hdmi_safe=1
by amgrays
Mon Nov 11, 2019 10:54 pm
Forum: Troubleshooting
Topic: Pi 4 4GB- Wifi not working when resolution is set too high
Replies: 75
Views: 7519

Re: Pi 4 4GB- Wifi not working when resolution is set too high

jamesh wrote:
Mon Nov 11, 2019 10:19 am
Do you have a cable that does NOT need the adapter, preferably 1M? I wonder if the adapter cable and/or the extra plugs, are leaking RF.
No I don't but will get one and report back. Would that explain a significant different between HDMI0 and HDMI1?
by amgrays
Mon Nov 11, 2019 2:25 am
Forum: Troubleshooting
Topic: Pi 4 4GB- Wifi not working when resolution is set too high
Replies: 75
Views: 7519

Re: Pi 4 4GB- Wifi not working when resolution is set too high

Some test results on HDMI0, hdmi-safe=1 (640x480 60Hz). Monitor connection is with 10cm micro HDMI to female HDMI connected to standard HDMI M-M (approx 2m) 1) Monitor unplugged: Av = 56ms --- google.com ping statistics --- 87 packets transmitted, 85 received, 2.29885% packet loss, time 255ms rtt mi...
by amgrays
Sun Nov 10, 2019 9:09 pm
Forum: Troubleshooting
Topic: Pi 4 4GB- Wifi not working when resolution is set too high
Replies: 75
Views: 7519

Re: Pi 4 4GB- Wifi not working when resolution is set too high

I have had similar problems: - in one location, removing the USB card reader from USB3 to USB2 socket appeared to resolve the issue (I managed to destroy a 32G card while plugged into the USB3 port for some reason but that is another issue - or maybe related) - in another location I have managed to ...

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