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cryptosidus
n00b
Joined: 18 Aug 2020
Posts: 32
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 Posted: Fri Aug 28, 2020 9:22 am Post subject: 5.8.5 & genkernel all don't boot (SOLVED) |
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Hi.
I saw an update from gentoo-sources 5.8.5 package and ran:
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genkernel --lvm --luks all
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grub-mkconfig -o /boot/grub/grub.cfg
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grub-mkconfig printed 5.8.5, 5.8.4, and 5.8.3. Rebooted and booted into 5.8.5. No errors in booting, but I noticed 5.8.5 didn't load kernel modules before asking password to mount LUKS-LVM root partition. My other older 5.8.x always load kernel modules before asking password.
I entered my password and it mounted and it cannot find the root. it asked me to enter root path (/dev/mapper/v0-root) or enter shell or quit.
I had to enter shell and ran to reboot:
selected 5.8.4 in grub to boot.
My other 5.8.4 and 5.8.3 kernels were compiled and installed with the same commands: genkernel --luks --lvm all && grub-mkconfig -o /boot/grub/grub.cfg
Diff
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diff /boot/config-5.8.5-gentoo-x86_64 /boot/config-5.8.4-gentoo-x86_64
< # Linux/x86 5.8.5-gentoo Kernel Configuration
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both configs are identical except the version. So 5.8.4 and older kernels worked fine with genkernel.
My /etc/default/grub is the same for 5.8.4 and other 5.8.3 and never been modified for 5.8.5
Genkernel version 4.1.1
Profile: stage3 systemd
Last edited by cryptosidus on Sat Aug 29, 2020 12:34 am; edited 1 time in total |
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TurgidWhale
n00b
Joined: 28 Aug 2020
Posts: 1
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| Posted: Fri Aug 28, 2020 2:37 pm Post subject: |
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Hello,
I have a similar setup as you (luks+lvm, 5.4.60 gentoo sources kernel), and was running into a similar problem where modules weren't getting loaded. While my system did boot after a long search for root, a lot of my hardware did not work without an rmmod and modprobe of the relevant kernel module. For me, genkernel was updated since I last updated my kernel, and the newer version seems to be buggy. Masking | Code: | | sys-kernel/genkernel-4.1.0-r2 |
and then running | Code: | | emerge --ask --update sys-kernel/genkernel |
and regenerating my initramfs seemed to do the trick.
Hope that helps. |
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cryptosidus
n00b
Joined: 18 Aug 2020
Posts: 32
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| Posted: Fri Aug 28, 2020 3:24 pm Post subject: |
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I can confirm that too.
Downgraded to genkernel 4.1.0-rc2. Re-compiled 5.8.5 and booted into 5.8.5 flawlessly. It seems newer genkernel version is buggy.
Thank you! |
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Whissi
Retired Dev
Joined: 12 Jan 2011
Posts: 222
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| Posted: Fri Aug 28, 2020 4:27 pm Post subject: |
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What was the exact error? That root couldn't be found? Do you set rootfstype on kernel command-line? Like you noticed, genkernel-4.1.1 disabled dumb module loading and is now requiring udev to do that job (old dumb loading can be re-enabled by setting "gk.hw.use-modules_load=yes" on kernel command-line). There is currently a known problem when filesystem is not built into kernel and rootfstype isn't set on kernel command-line. In that case, "mount" will use "-t auto" which will not trigger module loading. A fix is pending which will add filesystem detection to trigger module loading...
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Regards,
Whissi |
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cryptosidus
n00b
Joined: 18 Aug 2020
Posts: 32
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| Posted: Fri Aug 28, 2020 4:34 pm Post subject: |
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It didn't find the root.
I have this in my /etc/default/grub
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GRUB_CMDLINE_LINUX="init=/usr/lib/systemd/systemd dolvm crypt_root=UUID=<my root partition's UUID> root=/dev/mapper/v0-root"
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Whissi
Retired Dev
Joined: 12 Jan 2011
Posts: 222
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| Posted: Fri Aug 28, 2020 4:38 pm Post subject: |
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And can you please check if used root filesystem is built as module?
_________________
Regards,
Whissi |
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cryptosidus
n00b
Joined: 18 Aug 2020
Posts: 32
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| Posted: Fri Aug 28, 2020 5:19 pm Post subject: |
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Yes it is.
If you wondered what I did:
kernel 5.8.5 was already compiled with genkernel --luks --lvm all
gentoo-sources 5.8.5 + genkernel 4.1.1
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genkernel --luks --lvm initramfs
grub-mkconfig -o /boot/grub/grub.cfg
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rebooted, booted 5.8.5, and it didn't find the root. I rebooted again to manually boot 5.8.4 from grub. reinstalled genkernel 4.1.0-rc
gentoo-sources 5.8.5 + genkernel 4.1.0-rc2
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genkernel --luks --lvm initramfs
grub-mkconfig -o /boot/grub/grub.cfg
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rebooted, booted 5.8.5, and logged in without any issue. |
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Whissi
Retired Dev
Joined: 12 Jan 2011
Posts: 222
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| Posted: Fri Aug 28, 2020 10:27 pm Post subject: |
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OK, thank you for confirming.
The mentioned fix is now released and part of genkernel-4.1.2!
_________________
Regards,
Whissi |
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cryptosidus
n00b
Joined: 18 Aug 2020
Posts: 32
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| Posted: Sat Aug 29, 2020 12:34 am Post subject: |
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Whissi,
Awesome! Yes, just booted 5.8.5 + genkernel 4.1.2 without any issue. Thank you! 
Updated the subject. |
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