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Wireless on Lenovo E570 / Realtek 8821CE

asked 2017-08-04 09:37:01 -0600

LordSpriggan gravatar image

updated 2017-08-23 03:19:19 -0600

I have a Lenovo E570, and unfortunately the wireless does not work out of the box with Fedora 26. I used lspci to identify the card - https://pastebin.com/kkhaQgbm - and someone from Stack Exchange identified it as a Realtek 8821CE ( https://unix.stackexchange.com/questi... ).

I have compiled the drivers and used modprobe, but I still do not get the option to configure a wireless network when I open network manager. iwlist scan also reports that no devices I have are capable of scanning for wireless networks.

Am I missing anything here? I suspect this might be a misidentified wireless card and I'm simply loading the wrong driver, but I'm not sure where people get these hardware IDs from - if I check the specs on the lenovo website it says it should be a "Intel® Dual Band Wireless AC (2x2) 8265 + Bluetooth® 4.1".

I've uploaded some lspci, ip, and nmcli output here: https://pastebin.com/st5jZkXH .

Any help greatly appreciated.


EDIT: Output of nmcli radio (see Edit 2): WIFI-HW WIFI WWAN-HW WWAN
enabled disabled enabled enabled

And the output of the NetworkManager logs from Journalctl: https://pastebin.com/MZQ5ebFh

Note i've since bought a USB WiFi adapter, but it wasn't plugged in this boot. WiFi was disabled in NetworkManager when the adapter was last attached, which would explain the nmcli output. As before, the WiFi option is just not showing up in the Network Manager interface at all unless I plug in my USB WiFi adapter.


EDIT 2: Thanks for the responses, but nmcli reporting the WiFi is off is not the issue. I plugged the USB adapter back in, then enabled WiFi from NetworkManager, and rebooted the machine without the USB adapter; nmcli now shows that WiFi is enabled. Updated nmcli / journalctl output can be found here: https://pastebin.com/XfXS9ASc .

WiFi is now enabled, but without the USB adapter I can't use the WiFi - there's no option in NetworkManager, and the only fn key that seems available on this laptop is for Airplane mode, which is definitely NOT enabled.

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Post the output of these.

nmcli radio

nmcli g log level debug
journalctl -b -u NetworkManager >> Journalctl_logs.txt
anishjp gravatar imageanishjp ( 2017-08-15 08:44:06 -0600 )edit

So how about rfkill unblock all?

ozeszty gravatar imageozeszty ( 2017-08-23 07:01:34 -0600 )edit

rfkill reports that everything is unblocked:

$ rfkill list all
0: tpacpi_bluetooth_sw: Bluetooth
    Soft blocked: no
    Hard blocked: no
1: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
LordSpriggan gravatar imageLordSpriggan ( 2017-08-24 05:40:00 -0600 )edit

rfkill reports only BT, so something is not right with the installed driver. Post output of lspci -vvs 05:00.0

ozeszty gravatar imageozeszty ( 2017-08-25 15:53:49 -0600 )edit

Output is here: https://pastebin.com/Desp0wpd (Apologies for the delay - last minute vacation :D )

LordSpriggan gravatar imageLordSpriggan ( 2017-09-13 06:33:59 -0600 )edit

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answered 2017-08-22 11:25:20 -0600

ozeszty gravatar image

Logs that anishjp requested are helpful:

WIFI-HW WIFI WWAN-HW WWAN

enabled disabled enabled enabled

Aug 22 08:56:26 zoidberg NetworkManager[8349]: <info>  [1503388586.9400] manager: rfkill: WiFi enabled by radio killswitch; disabled by state file

It looks like your WiFi is soft-blocked, you can unblock it using keyboard (key with antena or plane icon, probably F8 or Fn+F8) or using rfkill unblock 0 (use rfkill list to check if your wifi's index numer is actually 0 or rfkill unblock all to toggle all radio devices).

10ec:c821 from your lspci output unequivocally identifies your card as Realtek one. Intel 8265 would have worked without installing additional drivers, but you'd still have to enable (unblock) it, like on any other laptop.

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Asked: 2017-08-04 09:35:52 -0600

Seen: 1,677 times

Last updated: Aug 23 '17