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I recently have started dual booting my work laptop with Kubuntu 21.10 and Windows 11 and for some reason the WiFi signal when running Kubuntu is extremely poor and near unusable. I am experiencing around 0.2MBps compared to about 20MBps from my phone and when running Windows in the same room.

I have a Dell Vostro 15 7510 laptop and my WiFi chip is the Tiger Lake PCH CNVi WiFi. I am running Kubuntu 21.10 with Kernal 5.13.0-46-generic.

I have tried some suggestions I have found, such as changing my MTU settings to 1492 (it was at 1500 by default). I also disabled the power saving settings and secure boot. These solutions were outlined both here and here.

I'm a bit stumped as to what I should try next. Any help would be greatly appreciated.

Aiden Contini
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  • I would likely boot Ubuntu 22.04 LTS media & use the "*Try Ubuntu*" type option to use it in *live* mode and see if it works there.. [Ubuntu 21.10 EOL notices are already out](https://fridge.ubuntu.com/2022/06/01/ubuntu-21-10-impish-indri-reaches-end-of-life-on-july-14-2022/) which includes flavors like Kubuntu, so you'll be moving to a newer kernel (thus newer kernel modules, aka *drivers*) very soon anyway; and thus I'd get there first before spending time on the issue (*I'm assuming ethernet is available.. if your device doesn't have this my comment may be different..*) – guiverc Jun 07 '22 at 05:19
  • Thanks for your response! I will try out 22.04 and see if the issue persists with that OS. I do unfortunately want to keep my current install as I have it set up exactly how I want it, is there any way I can proceed with an update to the LTS version or an updated version of my current OS or do I just need to wait until Kubuntu pushes an update my way? Unfortunately ethernet is not really a viable option for me at work as we don't have any data points installed yet in my area (just fresh in a new office). – Aiden Contini Jun 07 '22 at 14:42
  • I suggest you read release announcements eg. https://fridge.ubuntu.com/2022/04/21/ubuntu-22-04-lts-jammy-jellyfish-released/ or the Ubuntu 22.04 LTS release notes as many links or a section on upgrading is provided (eg. https://ubuntu.com/tutorials/upgrading-ubuntu-desktop#1-before-you-start for desktop from prior link, it was a different link for servers). You can also *upgrade via re-install* and have your files untouched, and *manually installed* package re-installed (where from Ubuntu repositories) too (*my backup should I have issues with release-upgrade, or my goto if short on time*) – guiverc Jun 07 '22 at 22:36
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    FYI: I'd still run a *live* test, as the difference will primarily be related to the kernel stack, ie. on 21.10 you're using 5.13 where as 22.04 (*or 20.04.5 when that's reached*) can be easily tested using the *live* media without any install/change-to-your-system.. As it's possible to *test* without any changes it's why I'd do that first.. as if it solves the issue, it's an upgrade that's compulsory in days-weeks anyway. – guiverc Jun 07 '22 at 22:39

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Thanks for the recommendation to upgrade to 22.04. I just ran the update and this managed to fix everything. Glad this worked out! Thanks again

Aiden Contini
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