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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 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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