Are you using grub2?
There’s a known “problem” that the “Distributor” string will not get changed on upgrade, because it is user editable.
Enter YaST->System->Boot Loader->Boot Loader Options and change it to what you like.
Then the kernel. Since a while now, multiversion is enabled by default for kernel packages. It is configured to keep at least 2 kernels. Since you upgraded from 12.3 and there’s only 1 kernel yet for 13.1 (there has been no kernel update yet), and the latest 12.3 kernel is still installed therefore.
You should have an entry with kernel 3.11.6 as well in the menu, just boot that. (maybe have a look in “Advanced Options”)
If you want to, you can of course uninstall the old kernel in YaST->Software Management f.e. Just select the kernel package and click on “Versions” in the bottom-right area to uninstall just the old version.
I thought that by executing
(as Root) I would solve this little problem but the OS informs me that it does not recognize the command…
For grub2 the command is called grub2-mkconfig. But this called automatically by YaST.
Well, you can of course still use grub legacy on openSUSE.
It should work as well. If you change to GRUB in YaST->Boot Loader, its menu should get automatically updated when necessary.
But it will show all installed kernels, so the menu can get a bit crowded. You can of course edit it manually: /boot/grub/menu.cfg or also in YaST->Boot Loader.
And in openSUSE the command to update the boot loader is “update-bootloader” (applies to all supported boot loaders) or “grub-install” (specific to grub legacy). There is no “update-grub”.
> I just upgraded my desktop PC from v. 12.3 to v. 13.1 (64-bit).
> The upgrade was done via the DVD method by selecting to upgrade an
> existing version.
> Everything seems to have gone very well, except for a minor problem:
> When booting up GRUB presents the following choice:
> DESKTOP – OPENSUSE 12.3 - 3.7.10-1.16
> How do I get GRUB to let me boot up v. 13.1 (and whatever kernel comes
> with it!) instead?
> I thought that by executing
> (as Root) I would solve this little problem but the OS informs me that
> it does not recognize the command…
I had the same problem after updating 12.3->13.1 (DVD image on USB).
Looking at the log, I saw there was an error during the installation of the
new kernel (plymouth related). 13.1 booted OK with the old kernel.
Afterwards I re-installed the 3.11.6 kernel (with YaST) and the grub menu