Ubuntu
os-prober package

  1. Bug #1770173
  2. Comment #17

Comment 17 for bug 1770173

Revision history for this message
Mike Tallroth (mike-tallroth) wrote : Re: 18.04 install stuck on grub install

Ok, new experiment. I'm including the steps here and in an attached README along with outputs captured at various points in the process in a tar.gz file.

I've moved drives around throughout this debugging process, but for this experiment they were;
/dev/sda - 80GB spinner (os install drive)
/dev/sdb - ZFS USB drive (problem drive)
/dev/sdc - ext4 USB drive (data drive to transfer output files)

Let me know if there are variations in the process I should try.

miket$ cat README
Auto Install up to "Install the GRUB boot loader on a hard disk" step
Alt-F2
nano /target/usr/bin/os-prober (-ex)
nano /bin/os-prober (-ex)

./step1
/target/usr/bin/os-prober > os-prober.log 2>&1
ps > ps.log
cp /var/log/syslog .

Alt-F1
Proceed with auto install of GRUB to /dev/sda
Wait until it is stuck at 66% for about 1 minute
Alt-F2

./step2
ps > ps.log
cp /var/log/syslog .

./step3
/target/usr/bin/os-prober > os-prober.log 2>&1
ps > ps.log
cp /var/log/syslog .