I added the packaging tag because this was a packaging error in the 20.04 and 20.04.1 images.
** Tags added: packaging ** Description changed: + Beginning about January 8th Focal users that installed Focal using + either the Ubuntu 20.04 or 20.04.1 installation media began getting + updated to the 5.8 series linux kernel. Those who had installed using + the Ubuntu Focal Beta were not effected. This is because Focal Beta was + properly built with ‘linux-generic’ but the 20.04 and 20.04.1 images + were built with ‘linux-generic-hwe-20.04‘. This can be easily verified + by looking at the iso manifest: + + https://releases.ubuntu.com/20.04.1/ubuntu-20.04.1-desktop- + amd64.manifest + + Note: old-release manifests (where 20.04 Beta and 20.04 reside) must be + downloaded here: + + https://old-releases.ubuntu.com/releases/20.04/ + + The expected behavior is for Ubuntu Focal users to remain on the 5.4 + series kernel unless they install with 20.04.2 or later images as + indicated here: + + https://wiki.ubuntu.com/Kernel/LTSEnablementStack + + While not entirely updated it says “if one wants to remain on the + original GA (General Availability) stacks, the options [include]; + Install from a previous + 12.04.0/12.04.1/14.04.0/14.04.1/16.04.0/16.04.1/18.04.0/18.04.1 point + release and update”. + + Jump just below that to the Focal specific notes and it says “The + 20.04.2 and newer point releases will ship with an updated kernel and X + stack by default for the desktop”. Since 20.04.2 is not even due for + release until next month it makes no sense for updates to the 5.8 series + kernel to be occurring unless the focal-proposed repos are enabled even + if HWE protocols had been changed. + + It’s also worth noting that thankfully no accompanying HWE X stack is + yet available in the repos. I say thankfully because my efforts at + downgrading the X stack in 16.04 and 18.04 were always successful! But + the lack of a matching X stack may explain the many complaints on the + forums about broken graphics??? + + It’s also worth noting that even the release notes say that “Ubuntu + 20.04 LTS is based on the long-term supported Linux release series 5.4“. + + https://wiki.ubuntu.com/FocalFossa/ReleaseNotes#Linux_Kernel + + Scroll to the bottom here and you’ll also see that 20.04 and 20.04.1 are + supposed to be supported with the 5.4 series kernel for the entire 5 + year life span: + + https://ubuntu.com/kernel/lifecycle + + The other flavors’ 20.04 and 20.04.1 images were all built correctly + with ‘linux-generic’ with the possible exception of Ubuntu Studio which + uses a kernel stack I’m not familiar with. I’m also uncertain about + Ubuntu server because I’m simply not familiar with it. + + Original bug description below: + + ################################################################## + Just as the title says, the 20.04 and 20.04.1 images use the HWE version of linux-generic resulting in upgrades to the 5.8 series kernel. This seems to effect Ubuntu only, or I should say I checked the Kubuntu, Ubuntu Mate, Xubuntu, and Lubuntu iso manifests which all correctly list linux-generic. Also HWE is not truly complete without the accompanying HWE Xstack. I checked all the documentation I could find and this was clearly not intentional. In fact the manifest for Ubuntu Focal Beta still used linux-generic, so this got messed up some time between April 3, 2020 and April 23, 2020. Here's just one example of the documentation for kernel support in Focal LTS: https://ubuntu.com/about/release-cycle#ubuntu-kernel-release-cycle Installations performed with 20.04 and 20.04.1 media were supposed to remain on the 5.4 series kernel throughout Focal's 5 year lifespan as had been the case since HWE was introduced. The first step in fixing this needs to be stopping fresh installs of Focal using the 20.04 and 20.04.1 media from immediately upgrading to the 5.8 series kernel. It might be a little tricky to revert users from 5.8 to 5.4, but there have been reports of breakage, particularly concerning Broadcom wifi drivers and some graphics problems. But the graphics problems could also be exacerbated by the lack of the matching HWE Xstack? At any rate it's a bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1911614 Title: Ubuntu 20.04 and 20.04.1 images use linux-generic-hwe-20.04 instead of linux-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-meta/+bug/1911614/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
