Public bug reported:
On last system upgrade I dropped on a Grub prompt .
After hours spent on internet from my smartphone, I managed to boot on
my zroot fs with the following procedure :
NOTE : the following errors have been OCR-ized from pictures taken with
smartphone, and most typos have been fixed (please forgive me for those
remaining)
```
grub> set root=(hd1.gpt3)
grub> linux /BOOT/ubuntu.p8Ss19/@/vmlinuz root=ZFS=rpool/ROOT/ubuntu.p85s19
boot=zfs
grub> initrd /BOOT/ubuntu.p85s19/@/initrd.img
grub> boot
```
I don't know if it's related , but errors start appearing while
installing new packages :
```
Processing triggers for man-db (2.9.1-1) ...
ZSys is adding automatic system snapshot to GRUB menu
Error Service took too long to respond. Disconnecting client
```
I would like to fix this boot error and any attempts I made with grub
commands failed to this previous prompt.
Thank you for any hint or track you could provide.
Regards,
### error when install kernel update
```
image: initrd.img-5.11.0-25-generic in rpool/ROOT/ubuntu_p85sl9@autozsys_twfvik
Found linux image: vmlinuz-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_41opy3
Found initrd image: initrd. ing-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_41opy3
Found linux image: vmlinuz-5.11.6-27-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_41opy3
Found initrd image: initrd.tmg-5.11.8-27-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_41opy3
Found linux image: vmlinuz-5.11.0-34-generic in rpool/ROOT/ubuntu
p85sl9@autozsys_plzjig
Found initrd image: initrd.ing-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_plzjig
Found linux tmage: vnltnuz-5.11.0-27-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_plzjig
Found initrd image: initrd.img-5.11.0-27-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_plzjig
Found Linux image: vmlinuz-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_sug732
Found initrd image: initrd.ing-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_sug732
Found linux image: vmlinuz-5.11.0-27-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys sug732
Found initrd image: initrd.tmg-5.11.8-27-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_sug732
Found 11inux image: vmlinuz-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_pxcfk1
Found initrd image: initrd.ing-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_pxcfk1
Found linux image: vmlinuz-5.11.0-27-generic in
rpool/ROOT/ubuntu_p85s19@autozsys_pxcfk1
Found initrd image: initrd.ing-5.11.0-27-generic in
rpool/ROOT/ubuntu_p85s19@autozsys_pxcfk1
Found linux image: vmlinuz-5.11.0-34-generic in rpool/ROOT/ubuntu
p85sl9@autozsys_b2d7pt
Found initrd image: initrd.img-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_b2d7pt
Found linux image: vmlinuz-5.11.0-27-generic in
rpool/ROOT/ubuntu_p85s19@autozsys_b2d7pt
Found initrd image: initrd.ing-5.11.0-27-generic in
rpool/ROOT/ubuntu_p85s19@autozsys_b2d7pt
Found linux image: vmlinuz-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85s19@autozsys_erboow
Found initrd image: initrd. tmg-5.11.8-34-generic in rpool/ROOT/ubuntu
p85sl9@autozsys_erboow
Found linux image: vmlinuz-5.11.0-27-generic in rpool/ROOT/ubuntu
p85sl9@autozsys_erbobw
Found initrd image: initrd.img-5.11.8-27-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_erbouw
Found linux image: vmlinuz-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_e8gz7y
Found initrd image: initrd.img-5.11.0-34-generic in
rpool/ROOT/ubuntu_p85s19@autozsys_e8gz7y
Found Linux image: vmlinuz-5.11.0-27-generic in
rpool/ROOT/ubuntu_p85sl9@autozsys_e8gz7y
Found initrd image: initrd.img-5.11.8-27-generic in
rpool/ROOT/ubuntu_p85s19@autozsys_e8gz7y
/etc/grub.d/10_linux_zfs: 404: .: Can't open /tmp/zfsmat.TCEG2z/etc/os-release
device-mapper: reload ioctl on osprober-Linux-nvmeinip4 failed: Device or
resource busy
Command failed.
Adding boot menu entry for UEFI Firmware Settings
done
root@ubuntu:/
```
### OS Version and dataset info
```
sidh@rochefort:~$ uname -a
Linux rochefort 5.11.0-34-generic #36~20.04.1-Ubuntu SMP Fri Aug 27 08:06:32
UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
sidh@rochefort:~$ lsb_release -rd
Description:Ubuntu 20.04.3 LTS
Release:20.04
sidh@rochefort:~$ zfs list
NAME USED AVAIL REFER
MOUNTPOINT
bpool 366M 1,39G 96K /boot
bpool/BOOT 364M 1,39G 96K none
bpool/BOOT/ubuntu_p85sl9 364M 1,39G 194M /boot
rpool 301G 590G 96K /
rpool/ROOT16,3G 590G 96K none
rpool/ROOT/ubuntu_p85sl9 16,3G 590G 6,81G /
rpool/ROOT/ubuntu_p85sl9/srv96K 590G 96K /srv
rpool/ROOT/ubuntu_p85sl9/usr 72,5M 590G 96K /usr
rpool/ROOT/ubuntu_p85sl9/usr
