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shrooman
n00b
Joined: 24 Apr 2022
Posts: 32
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 Posted: Fri May 06, 2022 3:00 pm Post subject: [SOLVED] Problem loading custom kernel for Dell XPS 13 9370 |
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Hello!
I tried installing Gentoo on my Dell XPS 13 9370 (the USB-C version) last night, got the rEFInd boot manager working but my custom kernel won't load properly.
| Code: | | VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6 |
I made sure the NVMe and ext4/vfat drivers are installed into the kernel. Not sure why this is happening. May someone help me with my kernel .config? I always seem to get stuck on this part... Thanks!
/usr/src/linux/.config
/etc/portage/make.conf
# lspci; lsmod;
Last edited by shrooman on Fri May 06, 2022 9:40 pm; edited 1 time in total |
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grknight
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Joined: 20 Feb 2015
Posts: 1649
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| Posted: Fri May 06, 2022 3:13 pm Post subject: |
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| From the photo posted, the NVMe is found. But, the error indicates that no root= is specified on the command line, or some initramfs is required if nvme0n1p2 or nvme0n1p3 needs special attention (LUKS, LVM or using root=UUID= for example) |
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shrooman
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Joined: 24 Apr 2022
Posts: 32
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| Posted: Fri May 06, 2022 3:24 pm Post subject: |
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grknight,
Thank you for your response!
My refind_linux.conf is: | Code: |
"Boot with standard options" "root=PARTUUID=0fd3f78d-6700-7d44-a015-60cd1a96d1f8 quiet"
"Boot to single-user mode" "root=PARTUUID=0fd3f78d-6700-7d44-a015-60cd1a96d1f8 quiet single"
"Boot with minimal options" "ro root=PARTUUID=0fd3f78d-6700-7d44-a015-60cd1a96d1f8"
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Im passing PARTUUID and not UUID to the kernel. Do I still need an initramfs? I probably need one if I want microcode loaded, but this is my first time doing microcode loading for intel. |
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grknight
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Joined: 20 Feb 2015
Posts: 1649
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| Posted: Fri May 06, 2022 4:27 pm Post subject: |
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I would suggest adding "rootdelay=5 loglevel=8" the end of boot parameters to
- Ensure the config is being read
- Rule out the possibility of async discovery of the nvme
The output should include "Waiting 5 sec before mounting root device..." and actually stop for 5 seconds at that point
Last edited by grknight on Fri May 06, 2022 4:28 pm; edited 1 time in total |
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shrooman
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Joined: 24 Apr 2022
Posts: 32
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| Posted: Fri May 06, 2022 4:27 pm Post subject: |
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| Code: |
/boot
├── EFI
│ ├── BOOT
│ │ ├── BOOT.CSV
│ │ ├── bootx64.efi
│ │ ├── icons
│ │ ├── keys
│ │ ├── refind.conf
│ │ └── vars
│ ├── Gentoo
│ │ ├── early_ucode.cpio
│ │ ├── initramfs-5.15.32-gentoo-r1.img
│ │ └── vmlinuz-5.15.32-gentoo-r1
│ ├── refind
│ │ ├── BOOT.CSV
│ │ ├── icons
│ │ ├── keys
│ │ ├── refind.conf
│ │ ├── refind_x64.efi
│ │ └── vars
│ └── tools
└── refind_linux.conf
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refind.conf
| Code: |
menuentry Gentoo {
icon EFI/refind/icons/os_gentoo.png
loader boot/EFI/Gentoo/vmlinuz-5.15.32-gentoo-r1
options "initrd=/boot/EFI/Gentoo/early_ucode.cpio
initrd=/boot/EFI/Gentoo/initramfs-5.15.32-gentoo-r1.img
root=PARTUUID=0fd3f78d-6700-7d44-a015-60cd1a96d1f8"
}
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refind_linux.conf
| Code: |
"Boot with standard options" "root=PARTUUID=0fd3f78d-6700-7d44-a015-60cd1a96d1f8 initrd=/boot/EFI/Gentoo/early_ucode.cpio initrd=boot/EFI/Gentoo/initramfs-%v.img quiet"
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For some reason, the os stanza in refind.conf doesnt boot to the kernel at all. Booting using refind_linux.conf options drops me to a dracut debug. I dont know why this wont work now. |
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grknight
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Joined: 20 Feb 2015
Posts: 1649
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| Posted: Fri May 06, 2022 4:38 pm Post subject: |
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Unfortunately, I cannot help with rEFInd itself. I only have worked with grub and grub-mkconfig.
It would be interesting to capture the rdsosreport.txt from dracut emergency shell however. |
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shrooman
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Joined: 24 Apr 2022
Posts: 32
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| Posted: Fri May 06, 2022 5:37 pm Post subject: |
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| Code: |
dracut: fatal: no or empty root= argument
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Even though I specified root with a PARTUUID...
My output for dracut generating the initramfs with --early-microcode option. Looks like nothing went wrong. But Im also not 100%.
https://pastebin.com/qE875HTd |
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grknight
Retired Dev
Joined: 20 Feb 2015
Posts: 1649
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| Posted: Fri May 06, 2022 7:39 pm Post subject: |
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| shrooman wrote: | | Code: |
dracut: fatal: no or empty root= argument
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Even though I specified root with a PARTUUID...
My output for dracut generating the initramfs with --early-microcode option. Looks like nothing went wrong. But Im also not 100%.
https://pastebin.com/qE875HTd |
Sounds like rEFInd isn't passing it correctly. Alternatively, it can be baked into the kernel's config using CONFIG_CMDLINE for a default and then the loader could override it if needed. |
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shrooman
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Joined: 24 Apr 2022
Posts: 32
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| Posted: Fri May 06, 2022 9:26 pm Post subject: |
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grknight,
I rebuilt my kernel with my processor's intel-ucode built into CONFIG_EXTRA_FIRMWARE. Updated my refind.conf and the os stanza now works and I launch the kernel but I still get a kernel panic. I traded the PARTUUID for a UUID but I still get an error. | Code: | | VFS: unable to mount root fs on unknown-block(0,0) |
My refined refind.conf arguments.
My new kernel .config.
Maybe I should try rootdelay=5 again. |
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shrooman
n00b
Joined: 24 Apr 2022
Posts: 32
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| Posted: Fri May 06, 2022 9:37 pm Post subject: |
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Awesome, rootdelay did it! Thank you grknight.
By the way someone should move the wiki section on baking the microcode into the kernel to the top. I feel like that's much more fail safe atleast for refind. I don't have to even have an initramfs because it does one inside the kernel for the microcode (AFAIK). |
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Installing Gentoo
