Many users have discussed this problem on various forums on Internet but also in the official ones Forums support for Raspberry Pi, looking for a solution. Various ways of dealing with these forums have been mentioned in these forums. Of course, the simplest solution is to adjust the screen to a lower resolution.
Researchers are still looking for the cause of this issue that affects the functioning of WiFi on the Raspberry Pi 4.
Ο programmer Enrico Zini mentioned the issue and described it as follows: “A whole day of crazy work to fix the error and the result is that when the Raspberry Pi 4 is in 2560 x 1440 resolution, WiFi stops working. At a lower resolution, from 2048 x 1080 and below, there is no such problem"
- on both microHDMI outputs
- with two different cables: one with microHDMI to HDMI dongle adapter, one with microHDMI to HDMI
- with three different RaspberryPi drives
- with 4 different power supplies
- with stock Raspbian Buster Lite
- with stock Raspbian Buster
- by interrupting any process in the system, starting the network manually with wpa_supplicant and dhclient
- with two different SD cards
- by connecting to an AP, a few meters away from the Raspberry PI, or by connecting to a phone hotspot next to the Raspberry PI
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