when you boot debian select advanced options and you should have options of different kernels installed or before they have been upgraded and you just select that and boot
Seems like you still have 6.6.15 installed, so just remove/purge 6.7.9. You may want to hold linux-image-amd64 so it does not update it again on the next apt upgrade.
May I ask why are you running unstable?
If you use GRUB, you can just select the kernel you want to boot from (provided you did not remove all the previous kernel versions).
On Debian, downgrading a package is not a thing, the latest kernel becomes the `linux-image-amd64` package. But you can keep the `linux-image-amd64-6.6.15` if you installed it before.
There are some methods to downgrade specific or all packages that can work, but, more often than not, you end up with a borked system because you've neglected something. `unstable` is a development branch for a reason.
Kernels are different, as they are versioned by design. So a downgrade of a kernel package is just the same. Especially on unstable/testing where the distinction is a lot smaller as those packages were once unstable versions. My 6.6.15 kernel (currently in the one in testing) is still installed. You can also directly install it, no downgrade needed.
Yes. And it doesnt make any sense to have backports in your sources on unstable. Because those are rebuild for stable against packagds found in testing.
Are you running into issues with 6.7.9?
i had a problem when booting with 6.7.9 it gets stuck in the "VPR locked but not scrubber binary" log line in the booting process
I assume that's an Nvidia related issue; sorry to hear.
You just boot the version you want? Any reason why you want to run 6.6.15 over 6.7.9?
it gets stuck in line: vpr locked but no scrubber binary
Ok. Boot the other kernel and remember to file a bug.
when you boot debian select advanced options and you should have options of different kernels installed or before they have been upgraded and you just select that and boot
^ go into advanced options in GRUB
If you use GRUB, go into the Advanced Options and just select the older kernel
Seems like you still have 6.6.15 installed, so just remove/purge 6.7.9. You may want to hold linux-image-amd64 so it does not update it again on the next apt upgrade. May I ask why are you running unstable?
thank you for your response for trying new updated packages i want a bleeding edge releases
If you use GRUB, you can just select the kernel you want to boot from (provided you did not remove all the previous kernel versions). On Debian, downgrading a package is not a thing, the latest kernel becomes the `linux-image-amd64` package. But you can keep the `linux-image-amd64-6.6.15` if you installed it before. There are some methods to downgrade specific or all packages that can work, but, more often than not, you end up with a borked system because you've neglected something. `unstable` is a development branch for a reason.
Kernels are different, as they are versioned by design. So a downgrade of a kernel package is just the same. Especially on unstable/testing where the distinction is a lot smaller as those packages were once unstable versions. My 6.6.15 kernel (currently in the one in testing) is still installed. You can also directly install it, no downgrade needed.
Since that's exactly what I (tried to) say, I think there is a misunderstanding.
Add testing, stable, and/or backports to your sources. Then install/boot what you want.
Backports... on a unstable release. Backports is a rebuild of testing against stable. So why would one do this? Pick the testing version instead.
The post has testing in there and says "install whatever you want," not "install backports."
Yes. And it doesnt make any sense to have backports in your sources on unstable. Because those are rebuild for stable against packagds found in testing.