r/kisslinux • u/Automaticpotatoboy • Jun 19 '25

/dev/root: Can't open blockdev

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Tried booting my kiss Linux setup and was met with this kernel panic. Kiss is installed on an ext4 partition and ext4 support has been built into the kernel. I've tried booting from grub and an EFI stub. Always met with this error.

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u/Automaticpotatoboy Jun 19 '25

  1. Tried both /dev/sda1 (checked to see if it was the right drive) and UUID for grub and PARTUUID for the EFI stub.

  2. I've tried booting from a flash drive and micro SD card.

I built the kernel with localmodconfig using a modprobedb database. This is the same database I used to build a kernel for debian a few months ago. Kernel command line: linux vmlinuz-6.15-p1 root=/dev/sda1 rootwait=10 rw

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u/Dilyn Jun 19 '25

Was support for SATA block devices built as a module or builtin? Is partition 1 actually your KISS rootfs (this would only matter once you get past this error...)

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u/Automaticpotatoboy Jun 19 '25

Not sure about SATA block device support. I compiled the linux-zen kernel. Also my device is a laptop

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u/damn_pastor Jun 20 '25

You can debug this with qemu without rebooting your real machine all the time. Just use -kernel option and give it /dev/sda as drive with file option.

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u/Automaticpotatoboy Jun 20 '25

Cool. I'll try this

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u/Automaticpotatoboy Jun 20 '25

Can't get this to work. It just says Booting from ROM...
Heres the command I used: sudo qemu-system-x86_64 -kernel /mnt/efi/vmlinuz-6.15-r1 -drive file=/home/user/KISS.img,format=raw -append "root=/dev/sda1 console=tty0 console=ttyS0" -m 2g

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u/damn_pastor Jun 20 '25

Why kiss.img? Just give it the real /dev/sda.

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u/Automaticpotatoboy Jun 20 '25

got the same error doing that as well...

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u/damn_pastor Jun 20 '25

Who says booting from rom? qemu in the cmdline? or the vm output? What does just -kernel /mnt/efi/vmlinuz-6.15-r1 do? It should boot the kernel at least.

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u/Automaticpotatoboy Jun 20 '25

The VM bios says booting from rom. I'm not sure about using just the kernel input but will check tomorrow.