Intel Corporation Cannon Point-LP CNVi [Wireless-AC]

I’m having trouble with my wireless adapter lately. That is: sometimes when I turn off and on my laptop (Aspire A515-52G-75QD), the wireless adapter just disappears and there’s no way to turn it on or off (bluetooth works, wifi does not). The only way I found to bring it back to life has been to reset the UEFI settings. Do you have a similar issue? How to solve it?

Here’s some info about my system.

uname -a

Linux Acer 5.8.11-1-MANJARO #1 SMP PREEMPT Wed Sep 23 14:35:40 UTC 2020 x86_64 GNU/Linux`

lspci -knn | grep Net -A3

00:14.3 Network controller [0280]: Intel Corporation Cannon Point-LP CNVi [Wireless-AC] [8086:9df0] (rev 30)
        Subsystem: Intel Corporation Device [8086:0034]
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi

sudo rfkill list

0: acer-wireless: Wireless LAN
        Soft blocked: no
        Hard blocked: no

There are errors in the kernel log:

sudo dmesg -k -l err

[  578.243474] pcieport 0000:00:1d.0: AER: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Transmitter ID)                                                                                                      
[  578.243482] pcieport 0000:00:1d.0: AER:   device [8086:9db0] error status/mask=00001000/00002000
[  578.243487] pcieport 0000:00:1d.0: AER:    [12] Timeout

lspci -knn | grep 9db0 -A3

00:1d.0 PCI bridge [0604]: Intel Corporation Cannon Point-LP PCI Express Root Port #9 [8086:9db0] (rev f0)
        Kernel driver in use: pcieport

Related info:

Yup: had the exact same thing happening on my Acer Predator a few months back and the solution was:

  • Buy a new WiFi card of the exact same specs
  • Remove old WiFi card
  • insert new WiFi card

Problem gone!

When dismantling the laptop, I could see that the airflow around the WiFi card was blocked by a dust ball and that probably overheated (and partly burnt out) the card although I regularly (every 6 months) vacuumed my laptop.

  • My short-term solution is that I’m going to increase that to every 3 months now.
  • My long-term solution is to never buy an Acer again!
  • Tuxedo computers is #1 on my list now…