ANKH

@jock, but wifi was working with original firmware. Doesn't it implies that there is a kernel that can correctly start wifi?

Hello, @jock After a bit of researching i found out that actually rockchip devices initialize wifi in rfkill and there are even some special drivers in kernel for it. I studied a source code of rfkill and saw there hardcoded names of device tree properties that are present in original device tree. There is armbian/linux-rockchip repository where those drivers are present. Maybe that's somehow could help with my case? Does your kernel image have them? Or is it dead end too? Best regards)

@jock, maybe we should take a pause and get back to it later? no signs of wifi chip, log attached rk3328log

@jock, here is the new one similar errors - http://ix.io/4BoF sorry for bothering you upd: added a new full log file( pasted file seems to be not full) devicelog2

@jock, here is another log https://pastebin.com/pGU6rLah Here are errors: 3957 [ 2.804106] mmc_host mmc4: Bus speed (slot 0) = 50000000Hz (slot req 50000000Hz, actual 50000000HZ div = 0) 3958 [ 2.804204] mmc4: error -84 whilst initialising SDIO card 3959 [ 2.804404] dwmmc_rockchip ff5f0000.mmc: card claims to support voltages below defined range 3960 [ 2.808379] mmc4: error -110 whilst initialising MMC card 3961 [ 2.831332] mmc_host mmc4: Bus speed (slot 0) = 300000Hz (slot req 300000Hz, actual 300000HZ div = 0)

Hello, @jock Here is new log(with no wifi) https://pastebin.com/GrTWVfWu(last boot in the end)