From the Ubuntu Kernel FAQ ( https://wiki.ubuntu.com/Kernel/FAQ ) :
Given an Ubuntu kernel package version how do we find the release it is from? The kernel package version is of the following form 2.6.35-6.9. The numbers before the - represent the base upstream version from which this kernel was forked, the first number following the - represents the ABI number, the final number is an upload number.
This seems to contradict another item in the same FAQ:
Given an Ubuntu kernel package version how do we find the exact mainline release it is based on? The exact upstream mainline tag from which the Ubuntu kernels were forked can be found in the mainline kernel mapping table.
If we look at an excerpt from the mainline kernel mapping table we can see for example:
Ubuntu Kernel Version | Ubuntu Kernel Tag | Mainline Kernel Version
3.19.0-7.7 | Ubuntu-3.19.0-7.7 | 3.19.0
3.19.0-8.8 | Ubuntu-3.19.0-8.8 | 3.19.1
3.19.0-9.9 | Ubuntu-3.19.0-9.9 | 3.19.1
3.19.0-10.10 | Ubuntu-3.19.0-10.10 | 3.19.2
3.19.0-11.11 | Ubuntu-3.19.0-11.11 | 3.19.3
Here we see in the third column, as the mainline kernel version's third digit steps (3.19.0 -> 3.19.3) the Ubuntu kernel version's third digit does not step, it stays at 3.19.0. The third digit is the last digit before the "-" in the label. Does this not contradict the first FAQ answer above which says "The numbers before the - represent the base upstream version from which this kernel was forked..." ?