Arch Linux

archnoooooooob

Member

Registered: 2021-08-31

Posts: 3

RTL8821CE Wifi Issues

Hi, (my first post here)

I have wifi issues on my hp laptop with rtl8821ce wifi device,

what I did,

1) installed driver mentioned in the arch wiki, tried many things which were listed in the github page

2) installed a driver mentioned in the comments

3) installed linux lts kernel

4) installed dhcpcd

5) tried disabling aspm

6) blacklisted the driver included in the kernel

7) tried checking whether issue persists when laptop is plugged in, it does persist

lspci -k

02:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter
        DeviceName: WLAN
        Subsystem: Hewlett-Packard Company Device 831a
        Kernel driver in use: rtl8821ce
        Kernel modules: rtw_8821ce, 8821ce

I can connect to the internet after doing the 1st step, but random disconnects happen i network speed is much slower than usual.

Thanks.

archnoooooooob

Member

Registered: 2021-08-31

Posts: 3

Re: RTL8821CE Wifi Issues

also i get acpi errors while booting

ACPI Error: No handler for Region [RCM0] (00000000bb5a8f65) [SystemCMOS] (20200925/evregion-129)
archlinux kernel: ACPI Error: Region SystemCMOS (ID=5) has no handler (20200925/exfldio-261)
archlinux kernel: ACPI Error: Aborting method \_SB.WMID.ESDT due to previous error (AE_NOT_EXIST) (20200925/psparse-529)
archlinux kernel: ACPI Error: Aborting method \_SB.PCI0.LPCB.EC0._Q42 due to previous error (AE_NOT_EXIST) (20200925/psparse-529)

Edit: I found this error too

wpa_supplicant[336]: bgscan simple: Failed to enable signal strength monitoring

Last edited by archnoooooooob (2021-08-31 14:30:37)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,081

Re: RTL8821CE Wifi Issues

With which method are you connecting? The ACPI errors are irrelevant, please post outputs in [ code ] [ /code ] tags without the spaces.

General disclaimer, realtek devices are more of a lottery than anything in terms of driver quality, and chances that this will plain not work as you'd expect it to are very high, but still mention which method you are currently using to actually connect. Something that is absolutely paramount regardless of your device is that you do no mix networking daemons. You mentioned installing dhcpcd but also that you could already connect after step 1. What are you using to connect here and did you do anything else other than just installing the dhcpcd package.

Post the output of

find /etc/systemd -type l -exec test -f {} \; -print | awk -F'/' '{ printf ("%-40s | %s\n", $(NF-0), $(NF-1)) }' | sort -f

Last edited by V1del (2021-08-31 14:36:37)

archnoooooooob

Member

Registered: 2021-08-31

Posts: 3

Re: RTL8821CE Wifi Issues

I am currently using , only the driver mentioned in the arch wiki, which is rtl8821ce-dkms-git on AUR and linux-lts. People recommended me to try these different methods, none of them worked, I just mentioned whatever I tried.

Output:

dbus-org.freedesktop.nm-dispatcher.service | system
dirmngr.socket                           | sockets.target.wants
display-manager.service                  | system
getty@tty1.service                       | getty.target.wants
gpg-agent-browser.socket                 | sockets.target.wants
gpg-agent-extra.socket                   | sockets.target.wants
gpg-agent-ssh.socket                     | sockets.target.wants
gpg-agent.socket                         | sockets.target.wants
NetworkManager-wait-online.service       | network-online.target.wants
NetworkManager.service                   | multi-user.target.wants
p11-kit-server.socket                    | sockets.target.wants
pipewire.socket                          | sockets.target.wants
pulseaudio.socket                        | sockets.target.wants
remote-fs.target                         | multi-user.target.wants
xdg-user-dirs-update.service             | default.target.wants

Edit: I found this error too, I guess this may help

wpa_supplicant[336]: bgscan simple: Failed to enable signal strength monitoring

Last edited by archnoooooooob (2021-08-31 14:52:40)