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Fenrir avatar Ubuntu

Kernel cannot see my AX500 Wi-Fi card

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Fenrir

I managed to have Wi-Fi enabled and working for some weeks on my Dell XPS 9500 first with Ubuntu 20.04 with a custom kernel, and then for some days after upgrading to Ubuntu 21.04/hirsute with the generic kernel.

I am currently running the kernel 5.11.0-31-generic

My Wi-Fi card does not show up anymore, and it is not listed with lspci.

Expected lspci output:

6c:00.0 Network controller [0280] Qualcomm Device [17cb:1101] (rev 01)
Subsystem Bigfoot Networks, Inc. Device [1a56:a501]

From the logs, the kernel does not seem to see my PCI card:

Correct log (before the issue):

Aug 17 14:44:58 XXX kernel: [    0.375432] pci 0000:6c:00.0: [17cb:1101] type 00 class 0x028000
Aug 17 14:44:58 XXX kernel: [    0.375452] pci 0000:6c:00.0: reg 0x10: [mem 0xb4200000-0xb42fffff 64bit]
Aug 17 14:44:58 XXX kernel: [    0.375568] pci 0000:6c:00.0: PME# supported from D0 D3hot D3cold
Aug 17 14:44:58 XXX kernel: [    0.375628] pci 0000:6c:00.0: 4.000 Gb/s available PCIe bandwidth, limited by 5.0 GT/s PCIe x1 link at 0000:00:1c.5 (capable of 7.876 Gb/s with 8.0 GT/s PCIe x1 link)

17cb:1101 being the VID/PID of my card: https://www.pcilookup.com/?ven=17cb&dev=1101&action=submit

I tried to switch off my computer for some time but the kernel still can´t see my card.

Any idea of what could cause this issue ?

BR.

Edit:

After shuting down and unpluging the computer for a longer period, Wi-Fi is working well again. The card was probably in a unstable state. I am wondering if the suspend triggered the issue or something else ... I will monitor this issue.

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heynnema avatar
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heynnema
Boot back into your previous custom kernel and see if the wifi works again.
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Fenrir avatar
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Fenrir
Custom kernel was not working as well. However I managed to fix the issue ... for now (see my edit in the original post).
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Fenrir avatar
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Fenrir
On this laptop It is soldered on the board. I have completely replaced Windows by Ubuntu.
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