Thanks for further replies. I have given up trying to reinstall the bootloader, and having backed up my /home partition, I did a full reinstall.
But it's a shame I never really learned what happened or how to fix it.
Quote:
Originally Posted by mrmazda
The correct filename is /boot/grub2/grub.cfg.
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Yes, I had tried this earlier. But it hadn't worked. Clearly I was desperately trying anything to get it working!
Quote:
Originally Posted by mrmazda
My question is what via ordinary updates caused the failing result observed. I'm not aware of anything special about a preempt kernel that could foul the boot process. It seems to me more likely the grub.cfg regeneration process during updates was corrupted or aborted.
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Quote:
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Originally Posted by colorpurple21859
What is this patch you are referring to, details please.
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In answer to both of these, I'm probably using the word 'patch' incorrectly. It seems that a packaging error resulted in virtualbox requiring the kernel preempt (see
https://bugzilla.opensuse.org/show_bug.cgi?id=1180625). It seems to have caused various hardware issues for some (see, e.g.
https://forums.opensuse.org/showthre...ith-Virtualbox)
Following the update, my Grub menu was fine. It was during boot up that an error occured. I've not yet trawled through the logs to see what it was yet. Following that failed boot, it was then that I was landed at the Grub prompt. And from there all attempts at rescue failed.
Quote:
Originally Posted by mrmazda
In attempting rescue, not executing mount -a after executing chroot /mnt, resulted in /dev/sdb1 not being mounted within the chroot environment.
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Sorry if my reporting of my actions is inaccurate, but I certainly did
mount -a every time after the chroot. But the error seemed to be more about not finding the vg, even though it was mounted.
Quote:
Originally Posted by mrmazda
A clue to learning what went wrong might be possible by searching through /var/log/pbl*.
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I looked back at that log. Here is the before/after section:
Code:
>>>>>>>>>>>>>>>>
2020-12-17 09:11:39 <1> update-bootloader-7148 new.126: update-bootloader-7148 = /sbin/update-bootloader, version = 0.931, root = /dev/dm-0
2020-12-17 09:11:39 <1> update-bootloader-7148 main.269: /sbin/update-bootloader --refresh
2020-12-17 09:11:39 <1> update-bootloader-7148 main.271: bootloader = grub2-efi
2020-12-17 09:11:39 <1> update-bootloader-7148 main.277: locale =
2020-12-17 09:11:44 <1> update-bootloader-7148 run_command.294: '/usr/lib/bootloader/grub2-efi/config' = 0, output:
<<<<<<<<<<<<<<<<
+ /usr/sbin/grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub configuration file ...
Found theme: /boot/grub2/themes/openSUSE/theme.txt
Found linux image: /boot/vmlinuz-5.3.18-lp152.57-preempt
Found initrd image: /boot/initrd-5.3.18-lp152.57-preempt
Found linux image: /boot/vmlinuz-5.3.18-lp152.57-default
Found initrd image: /boot/initrd-5.3.18-lp152.57-default
Found linux image: /boot/vmlinuz-5.3.18-lp152.54-default
Found initrd image: /boot/initrd-5.3.18-lp152.54-default
Found linux image: /boot/vmlinuz-5.3.18-lp152.50-default
Found initrd image: /boot/initrd-5.3.18-lp152.50-default
done
>>>>>>>>>>>>>>>>
2020-12-17 10:14:20 <1> update-bootloader-9787 new.126: update-bootloader-9787 = /sbin/update-bootloader, version = 0.931, root = /dev/dm-0 (chroot)
2020-12-17 10:14:20 <1> update-bootloader-9787 main.269: /sbin/update-bootloader --refresh
2020-12-17 10:14:20 <1> update-bootloader-9787 main.271: bootloader = grub2-efi
2020-12-17 10:14:20 <1> update-bootloader-9787 main.277: locale =
2020-12-17 10:14:25 <1> update-bootloader-9787 run_command.294: '/usr/lib/bootloader/grub2-efi/config' = 0, output:
<<<<<<<<<<<<<<<<
+ /usr/sbin/grub2-mkconfig -o /boot/grub2/grub.cfg
/usr/bin/grub2-editenv: error: unknown filesystem.
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-5.3.18-lp152.57-preempt
Found initrd image: /boot/initrd-5.3.18-lp152.57-preempt
/usr/sbin/grub2-probe: error: unknown filesystem.
Found linux image: /boot/vmlinuz-5.3.18-lp152.57-default
Found initrd image: /boot/initrd-5.3.18-lp152.57-default
Found linux image: /boot/vmlinuz-5.3.18-lp152.54-default
Found initrd image: /boot/initrd-5.3.18-lp152.54-default
Found linux image: /boot/vmlinuz-5.3.18-lp152.50-default
Found initrd image: /boot/initrd-5.3.18-lp152.50-default
/usr/bin/grub2-editenv: error: unknown filesystem.
done
>>>>>>>>>>>>>>>>
So, as I described above, the preempt kernel was installed fine in Grub, and it booted through the Grub menu. It was later on in the boot that it failed. The only things I can think of are, 1. I've toggled secure boot on and off a few times in the past. And 2. I had a custom v4l2loopback module that has to be manually built every time the kernel updates. But quite why that led to problems with my grub installation, I have no idea.
As I said above, I'm back up and running now, but can't really mark this thread as "solved". Perhaps I should mark it "closed"?
