kernel version numbering

[Snowhog]

I'm just curious as to the reasoning behind the change in kernel version numbering. I had kernel version 4.4.0-33-generic and then a new kernel came down and installed: kernel version 4.4.0-9134-generic.

Why did the point release go from a two-digit (33) to a four-digit (9134), and why '91'?

[vinnywright]

where are you getting your kernels?

@hear I do not even see a .33 kernel ,,,,,,,,,,,,,,,,,,,,,

linux-image-4.4.0-22-generic/xenial-updates,xenial-security 4.4.0-22.40 amd64
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-22-lowlatency/xenial-updates,xenial-security 4.4.0-22.40 amd64
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-24-generic/xenial-updates,xenial-security,now 4.4.0-24.43 amd64 [installed]
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-24-lowlatency/xenial-updates,xenial-security 4.4.0-24.43 amd64
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-28-generic/xenial-updates,xenial-security 4.4.0-28.47 amd64
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-28-lowlatency/xenial-updates,xenial-security 4.4.0-28.47 amd64
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-31-generic/xenial-updates,xenial-security,now 4.4.0-31.50 amd64 [installed,automatic]
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-31-lowlatency/xenial-updates,xenial-security 4.4.0-31.50 amd64
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-34-generic/xenial-updates,xenial-security,now 4.4.0-34.53 amd64 [installed,automatic]
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

linux-image-4.4.0-34-lowlatency/xenial-updates,xenial-security 4.4.0-34.53 amd64
  Linux kernel image for version 4.4.0 on 64 bit x86 SMP

VINNY

[vinnywright]

OOPS ,,,,I just noticed you are in the yak,,,,,,,,,,,don't know nothing about this ,,,,,,,,,,,,,,,,,,,,,, guess I'v been lazy

VINNY

[acheron]

I'm just curious as to the reasoning behind the change in kernel version numbering. I had kernel version 4.4.0-33-generic and then a new kernel came down and installed: kernel version 4.4.0-9134-generic.

Why did the point release go from a two-digit (33) to a four-digit (9134), and why '91'?

IIRC proposed 4.6 version kernel in Yakkety was causing too many problems. To solve that and fix some problems where oddly new kernel was even blocking a large number of package migrations from proposed to release, the release team chose to revert back to and rebuild 4.4 kernel for now.

The different numbering for those rebuilds is to prevent them clashing with the Xenial kernels which otherwise would have identical numbering.

.i.e yakkety 4.4.0-9134 will always supersede xenial 4.4.0-34 on upgrade

Why '91'? I don't recall seeing a particular reason for those digits, though there may be one apart from just being higher.

[Snowhog]

My active sources:

deb http://us.archive.ubuntu.com/ubuntu/ yakkety main restricted
deb http://us.archive.ubuntu.com/ubuntu/ yakkety-updates main restricted
deb http://us.archive.ubuntu.com/ubuntu/ yakkety universe
deb http://us.archive.ubuntu.com/ubuntu/ yakkety-updates universe
deb http://us.archive.ubuntu.com/ubuntu/ yakkety multiverse
deb http://us.archive.ubuntu.com/ubuntu/ yakkety-updates multiverse
deb http://us.archive.ubuntu.com/ubuntu/ yakkety-backports main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu yakkety-security main restricted
deb http://security.ubuntu.com/ubuntu yakkety-security universe
deb http://security.ubuntu.com/ubuntu yakkety-security multiverse

[Snowhog]

Thank you for the explanation acheron.