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I'm using Ubuntu and following the NetworkManager documentation to enable WoWLAN. I'm worried that my wireless card does not support it. I installed NM through snap and followed the instructions (it came pre-installed without snap, which is confusing to me but I assume isn't a problem because the instructions for installing with snap did not mention it). I have enabled "Wake on PCIE" in the BIOS, and ran

snap set network-manager wifi.wake-on-wlan=any

However, when checking whether it's enabled:

$  sudo iw phy phy0 wowlan show
command failed: Operation not supported (-95)

Does this mean that my wireless card just has no hope of supporting it? I don't know where to check, and the kernel docs do not mention which drivers are supported. But I know that not all wifi cards support WoWLAN.

I don't know what model my wireless card is, but it's a USB card and sudo lshw -C network gives driver=rtl8192cu. I can get the rest of the output if it's helpful, but I'm posting from another machine so will need to use a pastebin.

I found this unanswered question for AR9462, which shows similar results but is for a different driver.

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  • In the Debian firmware-realtek package there exist some realtek firmwares supporting WoWLAN, but RTL8192CU is not among them. It's probably not supported. Commented Dec 27, 2020 at 22:00
  • @Freddy To make sure I'm understanding this correctly, does that same page suggest that RTL8192EU and RTL8723BS do support WoWLAN, for example? I'm probably going to buy a new wifi card if this one doesn't support it, so it's helpful to be able to tell which ones do. Commented Dec 27, 2020 at 22:12
  • I can't test or confirm it, but that's how I interpret it. Maybe there are other chipsets and drivers that support it out-of-the-box, but I don't know... Commented Dec 27, 2020 at 22:20
  • Thanks, no problem. I'll ask a separate question if I'm unsure. I assume any reasonably modern card from a manufacturer who is usually well supported on Linux will support it. Commented Dec 27, 2020 at 22:39

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