MCM-iMX93: Yocto Linux: Known Issues

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WiFi and BT prevent going to deep sleep
  • sleep command such as:
rtcwake -d rtc0 -m mem -s 5

fails

Workaround :

before going to sleep unbind SDIO devices 

modprobe -r mwifiex_sdio
modprobe -r btmrvl_sdio

Once the device wakes up, re-bind them: 

modprobe mwifiex_sdio
modprobe btmrvl_sdio
LPM doesn't work
  • missing file
/sys/devices/platform/imx93-lpm/mode
WIFI AP not communicating
  • can create AP
nmcli device wifi hotspot ssid imx93test con-name HotspotCon

but connection from other system fails 

root@ucm-imx93:~# nmcli radio wifi on
root@ucm-imx93:~# nmcli dev wifi con "imx93test" password "6hcZLYTg9b7v" name "Wifi"
 mwifiex_sdio mmc2:0001:1: info: successfully disconnected from e8:ed:d6:99:a0:f1: reason code 3
 mwifiex_sdio mmc2:0001:1: info: trying to associate to bssid e8:fb:1c:61:74:55
 mwifiex_sdio mmc2:0001:1: ASSOC_RESP: failed,    status code=46 err=0x431 a_id=0x0
 mwifiex_sdio mmc2:0001:1: assoc failure: reason Unknown connect failure
 mwifiex_sdio mmc2:0001:1: info: association to bssid e8:fb:1c:61:74:55 failed
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