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#1 2019-12-03 01:58:37

ohRealtek
New Member
Registered: 2019-12-03
Posts: 1

pc can't detect wifi hardware

i am using Ethernet at the moment

these are the post the output of some commands


lspci -k

03:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device c821
	Subsystem: Hewlett-Packard Company Device 831a

sudo dmesg | grep failed

user@debian:/$ sudo dmesg | grep failed
[    1.296702] pci 0000:01:00.0: BAR 6: failed to assign [mem size 0x00080000 pref]
[   12.802242] intel-vbtn INT33D6:00: failed to read Intel Virtual Button driver
[   13.318866] bluetooth hci0: firmware: failed to load rtl_bt/rtl8821a_config.bin (-2)
[   13.318890] bluetooth hci0: Direct firmware load for rtl_bt/rtl8821a_config.bin failed with error -2
[   23.500950] Bluetooth: hci0: download fw command failed (-110)
[10633.767028] usb 1-6:1.0: rebind failed: -517
[10633.767056] usb 1-6:1.1: rebind failed: -517
[10633.884420] bluetooth hci0: firmware: failed to load rtl_bt/rtl8821a_config.bin (-2)
[10633.884444] bluetooth hci0: Direct firmware load for rtl_bt/rtl8821a_config.bin failed with error -2
[10643.961012] Bluetooth: hci0: download fw command failed (-110)

sudo rfkill list

user@debian:/$ sudo rfkill list
1: hci0: Bluetooth
	Soft blocked: no
	Hard blocked: no


i tried this it s for ubuntu (worked for me before on ubuntu) Wi-Fi not working on Lenovo ThinkPad E570 (Realtek RTL8821CE)
i tried the first answear in the link but  i got an error

user@debian:~/Downloads/rtl8821ce$ sudo modprobe 8821ce
modprobe: FATAL: Module 8821ce not found in directory /lib/modules/4.9.0-9-amd64

and i tired  using dkms solution (in the same link 2nd answear) but i got this error

user@debian:~/Downloads/rtl8821ce-master$ sudo ./dkms-install.sh
About to run dkms install steps...
./dkms-install.sh: line 15: dkms: command not found
./dkms-install.sh: line 16: dkms: command not found
./dkms-install.sh: line 17: dkms: command not found
Finished running dkms install steps.

sorry for the long post, any help is appreciated

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#2 2019-12-04 06:59:20

ohnonot
...again
Registered: 2015-09-29
Posts: 4,165
Website

Re: pc can't detect wifi hardware

well that last error should be self-explanatory, no?

Assuming that you identified the device properly, and that your instructions are suitable for debian (I am not so sure about the latter) - something went wrong when building and installing it.
Sounds obvious, but with the information you gave it's all I can say.

Have a good look at this search. Maybe something is different for debian?
BTW, is this indeed a thinkpad e570?

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#3 2019-12-04 12:59:04

earlybird
ほやほや
Registered: 2015-12-16
Posts: 738
Website

Re: pc can't detect wifi hardware

@ohRealtek you should definitely use the DKMS-based flow since it will ensure that the module is rebuilt whenever you update the kernel.

I haven't had time to review this in depth but try following the instructions of this repository: https://github.com/tomaspinho/rtl8821ce.

It is the base of the rtl8821ce package in the Archlinux AUR and it is of reasonably good quality. Also has instructions for Debian in the README.

I suggest you check this one out.

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