v7.5

+ Raspberry Pi | Disable continuous SD card polling by default. This causes constant CPU load and repeated kernel errors when no SD card is inserted. Make clear that this basically disables hot-plug detection, which should be of minor interest for the vast majority of users.

config.txt

@@ -77,10 +77,14 @@ dtparam=audio=off
 #dtparam=spi=off
 
 #-------Serial/UART-----
-# NB: Enabled for 1st run only. If you want to keep this setting, please set CONFIG_SERIAL_CONSOLE_ENABLE=1 in dietpi.txt before 1st boot.
 # NB: "enable_uart=1" will forcefully set "core_freq=250" on WiFi/BT-capable RPi models, unless "force_turbo=1" is set as well.
 enable_uart=1
 
+#-------SD card HPD-----
+# Comment to enable SD card hot-plug detection, while booting via USB or network.
+# NB: This causes contant CPU load and kernel errors when no SD card is inserted.
+dtparam=sd_poll_once
+
 #-------Overclock-------
 temp_limit=65
 initial_turbo=20