What I suggested above was for the other bug: You reported two bugs in one report, which ends up in confusion...
Can you please run: bash -x /usr/sbin/update-grub > update-grub.txt 2>&1 and attach the file update-grub.txt?
What I suggested above was for the other bug: You reported two bugs in one report, which ends up in confusion...
Can you please run: bash -x /usr/sbin/ update- grub > update-grub.txt 2>&1
and attach the file update-grub.txt?