Comment 34 for bug 1807974

Just installed 20.10 and WiFi crashed in a few hours.

sudo dmesg --follow --human

[Dec 5 14:37] device-mapper: table: 253:2: linear: Device lookup failed
[ +0.000003] device-mapper: ioctl: error adding target to table
[Dec 5 14:38] ath10k_pci 0000:02:00.0: firmware crashed! (guid a21dbcfc-380d-40b9-8d18-2ab61792e770)
[ +0.000020] ath10k_pci 0000:02:00.0: qca6174 hw3.2 target 0x05030000 chip_id 0x00340aff sub 1a56:143a
[ +0.000006] ath10k_pci 0000:02:00.0: kconfig debug 0 debugfs 1 tracing 1 dfs 0 testmode 0
[ +0.002174] ath10k_pci 0000:02:00.0: firmware ver WLAN.RM.4.4.1-00140-QCARMSWPZ-1 api 6 features wowlan,ignore-otp,mfp crc32 29eb8ca1
[ +0.001569] ath10k_pci 0000:02:00.0: board_file api 2 bmi_id N/A crc32 4ac0889b
[ +0.000007] ath10k_pci 0000:02:00.0: htt-ver 3.60 wmi-op 4 htt-op 3 cal otp max-sta 32 raw 0 hwcrypto 1
[ +0.000149] ath10k_pci 0000:02:00.0: firmware register dump:
[ +0.000009] ath10k_pci 0000:02:00.0: [00]: 0x05030000 0x000015B3 0x009E2680 0x00955B31
[ +0.000006] ath10k_pci 0000:02:00.0: [04]: 0x009E2680 0x00060330 0x00000005 0x000000FF
[ +0.000005] ath10k_pci 0000:02:00.0: [08]: 0x0040A054 0x00000000 0x00000010 0x00429BE0
[ +0.000005] ath10k_pci 0000:02:00.0: [12]: 0x00000009 0x00000000 0x00952F6C 0x00952F77
[ +0.000005] ath10k_pci 0000:02:00.0: [16]: 0x00952CC4 0x00910712 0x00000000 0x0091080D
[ +0.000005] ath10k_pci 0000:02:00.0: [20]: 0x409E2680 0x0040E928 0x00000001 0x0049C444
[ +0.000005] ath10k_pci 0000:02:00.0: [24]: 0x809DDCEE 0x0040E988 0x0040E998 0xC09E2680
[ +0.000005] ath10k_pci 0000:02:00.0: [28]: 0x809E6F21 0x0040E9B8 0x0040A054 0x00000001
[ +0.000005] ath10k_pci 0000:02:00.0: [32]: 0x809F5C2D 0x0040E9E8 0x000003E8 0x00499EA8
[ +0.000005] ath10k_pci 0000:02:00.0: [36]: 0x809143A7 0x0040EA68 0x00499EB4 0x00429FC0
[ +0.000004] ath10k_pci 0000:02:00.0: [40]: 0x809F3A57 0x0040EA88 0x00411770 0x004117E0
[ +0.000005] ath10k_pci 0000:02:00.0: [44]: 0x809F37B2 0x0040EAA8 0x00000000 0x00000000
[ +0.000006] ath10k_pci 0000:02:00.0: [48]: 0x80911210 0x0040EAC8 0x00000008 0x00404130
[ +0.000009] ath10k_pci 0000:02:00.0: [52]: 0x80911154 0x0040EB28 0x00400000 0x00000000
[ +0.000005] ath10k_pci 0000:02:00.0: [56]: 0x8091122D 0x0040EB48 0x00000000 0x00400600
[ +0.000005] ath10k_pci 0000:02:00.0: Copy Engine register dump:
[ +0.000015] ath10k_pci 0000:02:00.0: [00]: 0x00034400 11 11 3 3
[ +0.000013] ath10k_pci 0000:02:00.0: [01]: 0x00034800 22 22 67 68
[ +0.000013] ath10k_pci 0000:02:00.0: [02]: 0x00034c00 27 27 26 27
[ +0.000013] ath10k_pci 0000:02:00.0: [03]: 0x00035000 13 13 15 13
[ +0.000013] ath10k_pci 0000:02:00.0: [04]: 0x00035400 805 805 205 148
[ +0.000013] ath10k_pci 0000:02:00.0: [05]: 0x00035800 0 0 64 0
[ +0.000013] ath10k_pci 0000:02:00.0: [06]: 0x00035c00 1 1 12 12
[ +0.000013] ath10k_pci 0000:02:00.0: [07]: 0x00036000 0 0 0 0
[ +0.095814] ieee80211 phy0: Hardware restart was requested
[ +0.310986] ath10k_pci 0000:02:00.0: device successfully recovered

Despite the last message, WiFi didn't recover. I had to toggle it in Settings in order to get back online.