When using any option that generates a random UUID using sgdisk (e.g. sgdisk -G /dev/sda) you are presented with the warning: Warning! Unable to generate a proper UUID! Creating an improper one as a last resort! Windows 7 may crash if you save this partition table! This appears to stem from a change in libuuid where a #define was changed: https://github.com/util-linux/util-linux/commit/10f5f79485964ab52272ebe79c3b0047b1f84d82 Upstream gptfdisk has resolved this issue on 2022-04-16 (and a few others since) but these patches haven't yet made it into the buildroot package. Upstream commit: https://sourceforge.net/p/gptfdisk/code/ci/6a8416cbd12d55f882bb751993b94f72d338d96f/
Thank you for your report. The issue tracker for the Buildroot project has been moved to the Gitlab.com issue tracker: https://gitlab.com/buildroot.org/buildroot/-/issues We are taking this opportunity to close old issues in this old tracker. If you believe your issue is still relevant, please open one in the new issue tracker. Thank you!