Ubuntu – Why did Bionic kernel update to 4.15.0-24 get removed from the repos

18.04kernel

This kernel update was pushed out on Monday, and I updated most of our systems to it.

Today I got around to updating the last system, and the kernel update was not available. It appears that it was yanked from the repos.

On the system I tried to update today:

apt policy linux-generic
linux-generic:
  Installed: 4.15.0.23.25
  Candidate: 4.15.0.23.25
  Version table:
 *** 4.15.0.23.25 500
        500 [my local mirror]

On the systems updated Monday

apt policy linux-generic
linux-generic:
  Installed: 4.15.0.24.26
  Candidate: 4.15.0.24.26
  Version table:
 *** 4.15.0.24.26 100
        100 /var/lib/dpkg/status

Also my one remaining 16.04 system got this update Monday, and now it shows local/obsolete in synaptic.

enter image description here

Where can I see why this was done, and what are the consequences of remaining on this LTS kernel that was bad enough to be pulled back?

Related: Strategy to deal with Canonical's increasingly poor QA?

Best Answer

See the bug report: https://bugs.launchpad.net/ubuntu/bionic/+source/linux/+bug/1779827

Once this Critical bug was reported with enough detail, Canonical engineers and community volunteer testers bisected the problem and had a patch within 36 hours.

Note that this bug was critical, and worthy of pulling because booting at GRUB from previous kernels wasn't a viable workaround. Some folks reporting had to reinstall to restore functionality.

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