<https://forum.armbian.com/topic/7498-nanopc-t4/page/4/#comment-89707>
<http://schema.org/text>
"mmc-hs400-1_8v only worked for me with 4.4. Can't say when it broke, but i did a lot of testing and building my own image with all sorts of various patches you can find across the internet.\n \n\n\n\tPretty common problem on many boards, but nothing worked.\n \n\n\n\t \n \n\n\n\tIt would be interesting if mmc-hs400 works on any T4, or anyone could confirm.\n \n\n\n\t \n \n\n\n\tMy simple and lazy workaround is editing /boot/boot.cmd\n \n\n\nfdt rm /sdhci@fe330000 mmc-hs400-1_8v\nfdt rm /sdhci@fe330000 mmc-hs400-enhanced-strobe\n\n\n\tBut I am afraid this could easily break with an automatic u-boot update? Does this file get touched, or is there another way through /boot/armbianEnv.txt to make this change permanent.\n \n\n\n\tI would like to stick to original 2019-11-19 wich works very good for me, eg rootfs on nvme though armbian-config in a few seconds. \n \n\n\n\t \n \n"
<https://forum.armbian.com/topic/7498-nanopc-t4/page/4/?tab=comments#comment-77823>