O Iago :linux: :debian:<p>So, what to do? First, enter in the 3rd OS (Open SUSE) (before going in Windows!!!) and copy the contents being in /boot/grub/grub.cfg (to use in the 2nd OS, so use some Internet or USB or whatever). Second, in the 2nd OS (Debian-like) paste those contents in a new file /boot/grub/custom.cfg (see <a href="https://forums.debian.net/viewtopic.php?p=781500#p781500" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">forums.debian.net/viewtopic.ph</span><span class="invisible">p?p=781500#p781500</span></a>, <a href="https://forums.debian.net/viewtopic.php?t=159094" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">forums.debian.net/viewtopic.ph</span><span class="invisible">p?t=159094</span></a>) And 3rd, it is possible you have to replace in that file the entries /boot with entries /@/boot (<a href="https://forums.opensuse.org/t/trying-to-dualboot-opensuse-and-linux-mint-by-adding-mint-to-opensuse-grub-but-when-selecting-entry-i-get-error-you-need-to-load-kernel-first/179906" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">forums.opensuse.org/t/trying-t</span><span class="invisible">o-dualboot-opensuse-and-linux-mint-by-adding-mint-to-opensuse-grub-but-when-selecting-entry-i-get-error-you-need-to-load-kernel-first/179906</span></a>). </p><p>You can check this in the grub: press c to enter in the command line tool, press ls -l to see the partitions, and for example if (hd0,gpt1) is one of them, 'ls (hd0,gpt1)'+tab will show you the possible paths, being of the form '/boot' or being first '/@' and then '/@/boot'... (<a href="https://askubuntu.com/a/616821/830271" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">askubuntu.com/a/616821/830271</span><span class="invisible"></span></a>)</p><p>Anyway, I got Open SUSE Tumbleweed installed and accessible with Debian Grub2 after all the previous afternoon+evening+night looking for a solution.</p><p>2/2</p><p><a href="https://social.vivaldi.net/tags/OpenSUSE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OpenSUSE</span></a> <a href="https://social.vivaldi.net/tags/Debian" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Debian</span></a> <a href="https://social.vivaldi.net/tags/DualBoot" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DualBoot</span></a> <a href="https://social.vivaldi.net/tags/Grub" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Grub</span></a> <a href="https://social.vivaldi.net/tags/Grub2" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Grub2</span></a> <a href="https://social.vivaldi.net/tags/Linux" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Linux</span></a></p>