lilith wrote:That's great! So you didn't uminstall anything and left also the kxstudio repo in the source list?
I had not installed any packages from the backports in Debian Stretch.
I would not update with a system relevant package from the backports such as a kernel.
I would always boot and update with the original Debian Stretch kernel or the original Debian Stretch RT kernel.
The "kxstudio-repos_9.5.1~kxstudio3_all.deb" and the "kxstudio-repos-gcc5_9.5.1~kxstudio3_all.deb"
(Gentoo is currently running gcc-9.1.0-r1 (https://gentoo.zugaina.org/sys-devel/gcc) by the way ) are installed and have no problems at all with dist-upgrade.