On Sun 15 Mar 2026 at 17:48:30 (-0700), Xiyue Deng wrote: > Gerard ROBIN <[email protected]> writes: > > After a recent upgrade, the linux-image-6.19.6+deb14+1-amd64 kernel was > > installed on my Forky laptop, but when I restart my machine, the old kernel, > > linux-image-6.19.6+deb14-amd64, is selected by default. So I have two > > questions: > > > > Q1: Why isn't 6.19.6+deb14+1 selected by default? > > (When I select it manually, it works fine.) > > > > This seems to be due to the alphabetic sorting order. Considering the 2 > kernel names: > > ,----[ Notice the place marked by ^ ] > | linux-image-6.19.6+deb14-amd64 > | ^ > | linux-image-6.19.6+deb14+1-amd64 > | ^ > `---- > > The ascii code of '+' is 43, and '-' is 45, so '-' is considered a > bigger value so it's placed in higher precedence. > > (I hope the kernel team can find a better naming scheme, as this is > really confusing for most users.)
Presumably, something in the process of writing grub.cfg ought to be using dpkg --compare-versions rather than plain ASCII sorting. (Not sure what that something would be.) For example: ~$ dpkg --compare-versions 6.19.6+deb14+1-amd64 gt 6.19.6+deb14-amd64 ~$ dpkg --compare-versions 6.19.6+deb14+1-amd64 lt 6.19.6+deb14-amd64 1 ~$ (My bash prompt includes the return code only when it's non-zero.) Cheers, David.
