WiFi not working Kubuntu 20.04 – Intel 8265 Network Interface

I have a problem with my WiFi card on Kubuntu. Sometimes the system doesn’t recognise it, but what is strange is that it doesn’t happen everytime, but just about one boot on four, and I can’t understand why. If I run lshw -C network I get:

*-network UNCLAIMED       
       description: Network controller
       product: Wireless 8265 / 8275
       vendor: Intel Corporation
       physical id: 0
       bus info: <a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="5a2a39331a6a6a6a6a">[email protected]</a>:03:00.0
       version: 78
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress cap_list
       configuration: latency=0
       resources: memory:ef200000-ef201fff
  *-network
       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: <a href="https://getridbug.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="59293a301969696969">[email protected]</a>:04:00.0
       logical name: enp4s0
       version: 15
       serial: 4c:ed:fb:07:64:b1
       size: 100Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.2.131 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
       resources: irq:19 ioport:d000(size=256) memory:ef104000-ef104fff memory:ef100000-ef103fff

Do anyone know how to make it work steadly?

Answers:

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Method 1

If you have a dual-boot machine with a recent version of Windows and started seeing problems during initialization of the WiFi device when booting Linux, the problem could be due to the “fast startup” feature on Windows.

dmesg | grep iwlwifi

[    6.540045] iwlwifi 0000:03:00.0: enabling device (0000 -> 0002)
[    7.388211] iwlwifi: probe of 0000:03:00.0 failed with error -110

With this feature enabled, Windows don’t really shut down the entire system, but leaves things partially running so you can start the machine faster again.

Try to disable this option. on Windows 10 go to Control Panel→Hardware and Sound→Power Options→System Settings, then disable the Fast Startup option in Shutdown Settings. This will cause Windows to fully shutdown and may solve the issue.

EDIT: To get to System Settings from the Power Options screen, you may have to click “Choose what closing the lid does”.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0