On Fri, Jul 21, 2023 at 07:33:58PM +0100, Dimitri John Ledkov wrote: > If it is a concern that v5.15 jammy kernel may potentially be used > after partial / incomplete upgrade to Mantic, we can opt into using XZ > compressed firmware or I can backport ZSTD firmware support to jammy > GA kernel - it is a trivial patch (given that ZSTD itself is otherwise > available and used by the jammy kernel).
The scenario here is that the user has just upgraded to mantic, so they get the new linux firmware and the new kernel; they reboot to mantic, but there is a regression of some kind; they reboot back to the jammy kernel (which is the N-1 kernel on their system) to debug it, and that kernel has regressed support for their hardware because it can no longer load the needed firmware from the root filesystem. This is a realistic enough scenario that I think it is worth backporting the zstd support onto jammy's 5.15 kernel. Thanks, -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer https://www.debian.org/ slanga...@ubuntu.com vor...@debian.org
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