... [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 996912 [ 0.000000] Kernel command line: console=ttyS1,115200 console=tty0 root=PARTUUID=c6997a97-02 rw rootwait smsc95xx.macaddr=dc:a6:32:67:37:a3 [ 0.000000] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes, linear) ...

... to OS: no System Token: not set Boot Loaders Listed in EFI Variables: Title: GRUB ID: 0x0001 Status: active, boot-order Partition: /dev/disk/by-partuuid/b9f61df7-bf83-704c-b6de-af9e9f7a5f16 File: └─/EFI/GRUB/grubaa64.efi Title: Arch Linux ID: 0x0006 Status: active, boot-order Partition: /dev/disk/by-partuuid/b9f61df7-bf83-704c-b6de-af9e9f7a5f16 ...

... the initramfs properly. For my setup, using the uboot wrapped initramfs, the dmesg looks like: Kernel command line: console=ttyS2,1500000 root=PARTUUID=4d82c01e-01 rw rootwait ... Trying to unpack rootfs image as initramfs... Freeing initrd memory: 7204K ... There is no initrd passed from cmdline, ...

... d23092 u69632 [ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 260010 [ 0.000000] Kernel command line: console=ttyS0,115200 root=PARTUUID=a972bdac-01 rw rootwait [ 0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) [ 0.000000] Inode-cache hash table entries: ...

... via SD Card but not via eMMC and also not with eMMC and SD Adapter. The issue on my XU4 was that the eMMC modules root partition does not have a PARTUUID. As I did not find a way to create a PARTUUID without destroying all data, I did simply change the boot.txt to use /dev/mmcblk0p1 as root partition. ...

@aphirst great that you resolved your issue. So maybe just for documentation: The blkid command should show a PARTUUID for the root partition, but did not in my case. In /boot/boot.txt I have set the root partition to root=/dev/mmcblk0p1 in the "setenv bootargs" line, ...

... PTTYPE="dos" /dev/mmcblk0p1: LABEL="wandboardarch" UUID="21f112a1-b27b-449b-bc71-c20f25800441" TYPE="ext4" PARTUUID="000b6046-01" /dev/mmcblk0p2: LABEL="music1" UUID="59f95463-0a6c-4959-888b-d36f07c2ecad" TYPE="ext4" ...

Thanks moonman! Using PARTUUID works!

... #1 SMP PREEMPT Sat Jul 3 09:55:01 EEST 2021 armv7l [ 307.641] Kernel command line: cros_secure console= console=tty0 init=/sbin/init root=PARTUUID=0c3d1c3c-5b8f-1e45-ae49-dabb029be52e/PARTNROFF=1 rootwait rw noinitrd zswap.compressor=zstd zswap.max_pool_percent=40 audit=0 [ 307.641] Build ...

... press n. Do you want to do this? (y/n) " read -r tmpvar1 if $(echo $tmpvar1 | grep -q [Yy]); then bootcmd='console=tty0 init=/sbin/init root=PARTUUID=%U/PARTNROFF=1 rootwait rw zswap.compressor=zstd zswap.max_pool_percent=40 audit=0' echo "default bootcmd is $bootcmd Be very careful, ...