Wifi stop working (I think after kernel update)

wishmaster · 2020-10-19 19:12:14

Good morning.

My wifi connection is not working, yesterday I updated the arch linux kernel so I think that could be the reason.

$ lspci -k
01:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter
	Subsystem: Lenovo Device c024
	Kernel driver in use: rtw_8821ce
	Kernel modules: rtw88_8821ce, 8821ce

$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: wlp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DORMANT group default qlen 1000
    link/ether 6e:71:78:79:af:b9 brd ff:ff:ff:ff:ff:ff permaddr 28:39:26:33:cd:d5

Thanks for your help.

seth · 2020-10-19 19:50:45

The NIC is up but not associated to an AP - that can but is usually not kernel related.
Please post the complete system journal (sudo journalctl -b)

wishmaster · 2020-10-19 19:52:37

$ sudo journalctl -b
-- Logs begin at Sun 2020-10-18 07:27:47 -03, end at Mon 2020-10-19 16:49:17 -03. --
oct 19 15:52:40 Arch kernel: microcode: microcode updated early to revision 0xd6, date = 2020-04-23
oct 19 15:52:40 Arch kernel: Linux version 5.9.1-arch1-1 (linux@archlinux) (gcc (GCC) 10.2.0, GNU ld (GNU Binutils) 2.35.1) #1 SMP PRE>
oct 19 15:52:40 Arch kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=1d8ea04e-8170-4220-abe9-da972de698e9 rw loglevel=3>
oct 19 15:52:40 Arch kernel: KERNEL supported cpus:
oct 19 15:52:40 Arch kernel:   Intel GenuineIntel
oct 19 15:52:40 Arch kernel:   AMD AuthenticAMD
oct 19 15:52:40 Arch kernel:   Hygon HygonGenuine
oct 19 15:52:40 Arch kernel:   Centaur CentaurHauls
oct 19 15:52:40 Arch kernel:   zhaoxin   Shanghai
oct 19 15:52:40 Arch kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
oct 19 15:52:40 Arch kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
oct 19 15:52:40 Arch kernel: x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
oct 19 15:52:40 Arch kernel: x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers'
oct 19 15:52:40 Arch kernel: x86/fpu: Supporting XSAVE feature 0x010: 'MPX CSR'
oct 19 15:52:40 Arch kernel: x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
oct 19 15:52:40 Arch kernel: x86/fpu: xstate_offset[3]:  832, xstate_sizes[3]:   64
oct 19 15:52:40 Arch kernel: x86/fpu: xstate_offset[4]:  896, xstate_sizes[4]:   64
oct 19 15:52:40 Arch kernel: x86/fpu: Enabled xstate features 0x1f, context size is 960 bytes, using 'compacted' format.
oct 19 15:52:40 Arch kernel: BIOS-provided physical RAM map:
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009efff] usable
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x000000000009f000-0x00000000000fffff] reserved
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x0000000000100000-0x0000000073e86fff] usable
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x0000000073e87000-0x0000000074786fff] reserved
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x0000000074787000-0x000000008a99dfff] usable
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x000000008a99e000-0x000000008ab9dfff] type 20
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x000000008ab9e000-0x000000008b59dfff] reserved
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x000000008b59e000-0x000000008bc8dfff] ACPI NVS
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x000000008bc8e000-0x000000008bd0dfff] ACPI data
oct 19 15:52:40 Arch kernel: BIOS-e820: [mem 0x000000008bd0e000-0x000000008bd0efff] usable
lines 1-30

seth · 2020-10-19 19:53:52

Those are only the first 30 lines (in your pager)
Use the tip in the first link in my signature.

Arch Linux

#1 2020-10-19 19:12:14

Wifi stop working (I think after kernel update)

#2 2020-10-19 19:50:45

Re: Wifi stop working (I think after kernel update)

#3 2020-10-19 19:52:37

Re: Wifi stop working (I think after kernel update)

#4 2020-10-19 19:53:52

Re: Wifi stop working (I think after kernel update)

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