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I have a Dell XPS with Ubuntu 20.04 and kernel 5.4.0-33 smoothly running.

I've updated the kernel as suggested by the normal update process, but after rebooting the kernel is missing some modules, mainly the network ones (ath10k for wifi, and bluetooth too). sudo modprobe ath10k answers with a fatal error saying that the module file is missing.

I've attempted to update-initramfs by hand but nothing changed, so I had to go back using the previous version, 33.

What can I do to understand and fix the issue?

As requested by comments, info about my system: * I have installed 20.04 cleanly (no upgrade) and with full disk encryption

This is my wifi card under 5.4.0-33:

$ lspci -nnk | grep -i net -A2
02:00.0 Network controller [0280]: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter [168c:003e] (rev 32)
        Subsystem: Bigfoot Networks, Inc. QCA6174 802.11ac Wireless Network Adapter [1a56:1535]
        Kernel driver in use: ath10k_pci
        Kernel modules: ath10k_pci

[UPDATE] Under 5.4.0-37 the Kernel modules and Kernel driver in use entries are obviously missing, but the card is listed twice and a lot more other modules are missing (i915, processor_thermal_device, intel_pch_thermal, intel_lpss_pci, mei_me, snd_hda_intel, nouveau (but not the nvidia, which I'm using), ath10k_pci, rtsx_pci). You can look at the full lspci diff here: https://www.diffchecker.com/mVCbTzSL

I've also opened a Launchpad bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1883239

This is the modules that are present, notice that the module is missing for the 37 kernel:

$ find /usr/lib/modules -iname ath10k  
/usr/lib/modules/5.4.0-28-generic/kernel/drivers/net/wireless/ath/ath10k
/usr/lib/modules/5.4.0-31-generic/kernel/drivers/net/wireless/ath/ath10k
/usr/lib/modules/5.4.0-33-generic/kernel/drivers/net/wireless/ath/ath10k
Alessandro Lai
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  • separate /boot filesystem? df -h; df -i please. – nobody Jun 10 '20 at 07:28
  • @nobody I've added the info in the question, thank you. – Alessandro Lai Jun 10 '20 at 07:44
  • wrong system in my mind. find /usr/lib/modules -iname ath10k_* then you can see available modules for Atheros wlancards. for network cracks please (not me) lspci -nnk | grep -i net -A2 or if it is an usb device lsusb please. ` – nobody Jun 10 '20 at 08:03
  • @nobody question updated, the module is effectively missing for the newer kernel. – Alessandro Lai Jun 10 '20 at 08:10
  • this ath10k_pci is your module for the wlancard and it is loaded. Do you have problems with you internet connection? – nobody Jun 10 '20 at 08:13
  • @nobody not now but I rebooted under the 33 kernel to get the network back. IIRC under 37 lspci said disabled – Alessandro Lai Jun 10 '20 at 08:29
  • Might be related to the previous broken intel-microcode release that was released at the same bug. Although it has been since reverted, I also still need to boot with the 33 kernel, as with the 37 kernel networking is broken for me, too: https://askubuntu.com/a/1248853/117753 – Philipp Claßen Jun 12 '20 at 09:36
  • FTR, I've opened a bug on Launchpad; I'll edit the question with the same infos. – Alessandro Lai Jun 12 '20 at 10:55

1 Answers1

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I had the same problem, but using 18.04 lts. After installing 5.4.0-37 from apt, a specific package was not installed and I couldn't get Atheros kernel module.

I switched back to my working kernel and installed manually all other 5.4.0-37 packages found on repo. The Atheros wireless driver is in this one:

linux-modules-extra-5.4.0-37-generic

This is for 18.04 LTS; but maybe it also solve for 20.04 LTS. BTW, I've installed a fresh Kubuntu 20.04 LTS yesterday and the update to 5.4.0-37 worked fine, including Atheros wireless driver (ath10k*).

Hope this helps.

Eliah Kagan
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momenezes
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  • Thank you for the pointer. That package should be present as a dependency of the linux-modules-extra-generic metapackage, I'll check if that's present. – Alessandro Lai Jun 11 '20 at 18:23
  • I had a similar issue with HDMI port in my notebook after update to 5.4.0-37 and this resolved! Tks. – Lucas Polo Jun 25 '20 at 23:42