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When running sudo modprobe zram (or modinfo for that matter) I get the following error:

modprobe: FATAL: Module zram not found in directory /lib/modules/4.13.0-21-generic

Has zram been removed from Ubuntu 17.10?

muru
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Ru Hasha
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  • It works on my 17.10 system: filename: /lib/modules/4.13.0-21-generic/kernel/drivers/block/zram/zram.ko. – Jos Dec 24 '17 at 22:40
  • Is that on a live 17.10 / ISO? Maybe you installed/removed something that took out zram with it? – Xen2050 Dec 24 '17 at 23:53

1 Answers1

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No. Kernel modules are pretty rarely removed from the upstream kernel. However, many modules are split into a separate (versioned) linux-image-extra package in Ubuntu, and you may be missing said package for your kernel version.

dobey
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    And as expected, that's what the package index shows: https://packages.ubuntu.com/search?suite=artful&arch=amd64&mode=exactfilename&searchon=contents&keywords=zram.ko – muru Dec 25 '17 at 05:00
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    Thanks! I ended up doing sudo apt-get install linux-image-extra-virtual which installed the version specific linux-image-extra stuff too. :) – Ru Hasha Dec 25 '17 at 07:30
  • I'm on rpi ubuntu server 22 '5.15.0-1006-raspi' and used that official imager thingy. If I "install" an older version kernel/package that has zram module, does that replace/rollback the entire system (kernel?) and break everything else just to have zram? – Firsh - justifiedgrid.com May 16 '22 at 18:04
  • Solved it with sudo apt install linux-modules-extra-5.15.0-1006-raspi thanks to your help. I just realized this was in 2017 but found the newer stuff using that package search. – Firsh - justifiedgrid.com May 17 '22 at 07:22