$ sudo apt update
Hit:1 http://lv.archive.ubuntu.com/ubuntu lunar InRelease
Hit:2 http://lv.archive.ubuntu.com/ubuntu lunar-updates InRelease
Hit:3 http://lv.archive.ubuntu.com/ubuntu lunar-backports InRelease
Hit:4 https://dl.winehq.org/wine-builds/ubuntu kinetic InRelease
Get:5 http://security.ubuntu.com/ubuntu lunar-security InRelease [109 kB]
Hit:6 https://dl.google.com/linux/chrome/deb stable InRelease
Fetched 109 kB in 0s (280 kB/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
3 packages can be upgraded. Run 'apt list --upgradable' to see them.
$ apt list --upgradable
Listing... Done
linux-generic/lunar-updates 6.2.0.24.24 amd64 [upgradable from: 6.2.0.23.23]
linux-headers-generic/lunar-updates 6.2.0.24.24 amd64 [upgradable from: 6.2.0.23.23]
linux-image-generic/lunar-updates 6.2.0.24.24 amd64 [upgradable from: 6.2.0.23.23]
$ sudo apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
linux-generic linux-headers-generic linux-image-generic
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
$ sudo apt install linux-generic linux-headers-generic linux-image-generic
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
linux-headers-generic : Depends: linux-headers-6.2.0-24-generic but it is not installable
linux-image-generic : Depends: linux-image-6.2.0-24-generic but it is not going to be installed
Depends: linux-modules-extra-6.2.0-24-generic but it is not installable
E: Unable to correct problems, you have held broken packages.
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 23.04
Release: 23.04
Codename: lunar
答案1
我认为 canonical 只是忘记发布所需的软件包，几个小时后它应该会自行修复。你不是唯一遇到这个问题的人 :D
最新发布的版本是 6.2.0-23 https://packages.ubuntu.com/search?keywords=linux-headers-6.2.0-&searchon=names&suite=all§ion=all
答案2
现在已经修复，确实一定是‘尚未发布的包’。