.:Slackel - Hellenic Linux Distribution::.

Grub 2.06 no longer automatically find other operating systems installed while generating boot entries even if you have installed os-prober. We have to manually configure the os-prober by adding GRUB_DISABLE_OS_PROBER=false to /etc/default/grub.
So edit /etc/default/grub find the line #GRUB_DISABLE_OS_PROBER=true and change it to GRUB_DISABLE_OS_PROBER=false

After upgrading packages, I used Dotnew to update configuration files related to grub (among them, /etc/default/grub). This changed the line toSo I unless someone has a custom grub configuration, there is no need to manually edit /etc/default/grub; running Dotnew will do the same thing. Maybe that's because djemos changed the line already (given that the grub package ends with "dj")?

Oddly enough, grub loader still says "Grub 2.04" although it is actually 2.06. Other than that, update-grub worked as usual.

Yes i agree can use dotnew. I have just to mention that users have to be very careful to not update files as /etc/group, /etc/passwd, /etc/shadow etc.

Grub 2.06 cause a real problem on x86 systems making a grub loop reboot so no grub menu appeared and could not boot to system.
I had to recompile grub packages using -Os CFLAGS instead of -O2 to solve the problem.

grub loader says "Grub 2.06" here. I use the rebuilded package.

Debian and ubuntu use 2.04 version of grub.
Even the slackware grub package also has this problem. I did not update grub for long and when i decided to build the 2.06 version problem appeared.
Well i had to be careful for such critical packages before upgrade.