Running 22.04 on a Lenovo ideapad 5-15ARE05 (4800u) my Wifi suddenly stopped working yesterday after an update and reboot.
The Intel card is still recognized.
sudo lshw -C network
*-network
description: Network controller
product: Wi-Fi 6 AX200
But it doesn't run.
syslog
[ 12.450481] iwlwifi 0000:01:00.0: Transport status: 0x00000042, valid: 7
[ 12.450485] iwlwifi 0000:01:00.0: 0x20100240 | ADVANCED_SYSASSERT
[ 12.450489] iwlwifi 0000:01:00.0: 0x00000000 | umac branchlink1
[ 12.450492] iwlwifi 0000:01:00.0: 0x80455E3C | umac branchlink2
[ 12.450495] iwlwifi 0000:01:00.0: 0x8046E886 | umac interruptlink1
[ 12.450498] iwlwifi 0000:01:00.0: 0x00000000 | umac interruptlink2
[ 12.450501] iwlwifi 0000:01:00.0: 0xDEADBEEF | umac data1
[ 12.450504] iwlwifi 0000:01:00.0: 0xDEADBEEF | umac data2
[ 12.450506] iwlwifi 0000:01:00.0: 0xDEADBEEF | umac data3
[ 12.450509] iwlwifi 0000:01:00.0: 0x00000048 | umac major
[ 12.450512] iwlwifi 0000:01:00.0: 0xDAA05125 | umac minor
[ 12.450515] iwlwifi 0000:01:00.0: 0x00021493 | frame pointer
[ 12.450518] iwlwifi 0000:01:00.0: 0xC0886AE4 | stack pointer
[ 12.450521] iwlwifi 0000:01:00.0: 0x00000000 | last host cmd
[ 12.450524] iwlwifi 0000:01:00.0: 0x00000000 | isr status reg
[ 12.450815] iwlwifi 0000:01:00.0: IML/ROM dump:
[ 12.450818] iwlwifi 0000:01:00.0: 0x00000003 | IML/ROM error/state
[ 12.450925] iwlwifi 0000:01:00.0: 0x00006201 | IML/ROM data1
[ 12.451037] iwlwifi 0000:01:00.0: 0x00000080 | IML/ROM WFPM_AUTH_KEY_0
[ 12.451146] iwlwifi 0000:01:00.0: Fseq Registers:
[ 12.451200] iwlwifi 0000:01:00.0: 0x20000000 | FSEQ_ERROR_CODE
[ 12.451253] iwlwifi 0000:01:00.0: 0x80290021 | FSEQ_TOP_INIT_VERSION
[ 12.451305] iwlwifi 0000:01:00.0: 0x00050008 | FSEQ_CNVIO_INIT_VERSION
[ 12.451360] iwlwifi 0000:01:00.0: 0x0000A503 | FSEQ_OTP_VERSION
[ 12.451414] iwlwifi 0000:01:00.0: 0x80000003 | FSEQ_TOP_CONTENT_VERSION
[ 12.451467] iwlwifi 0000:01:00.0: 0x4552414E | FSEQ_ALIVE_TOKEN
[ 12.451522] iwlwifi 0000:01:00.0: 0x00100530 | FSEQ_CNVI_ID
[ 12.451575] iwlwifi 0000:01:00.0: 0x00000532 | FSEQ_CNVR_ID
[ 12.451629] iwlwifi 0000:01:00.0: 0x00100530 | CNVI_AUX_MISC_CHIP
[ 12.451686] iwlwifi 0000:01:00.0: 0x00000532 | CNVR_AUX_MISC_CHIP
[ 12.451741] iwlwifi 0000:01:00.0: 0x05B0905B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
[ 12.451797] iwlwifi 0000:01:00.0: 0x0000025B | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[ 12.451849] iwlwifi 0000:01:00.0: Failed to start RT ucode: -110
[ 12.451854] iwlwifi 0000:01:00.0: WRT: Collecting data: ini trigger 13 fired (delay=0ms).
When I boot an Ubuntu Live USB 20.04, the Wifi card is working, so it seems to be a regression from a recent update.
It's a Linux only laptop.
Booting an older kernel (5.15) on 22.04 doesn't help.
UPDATE
I also noted this line in dmesg
Driver unable to support your firmware API. Driver supports v72, firmware is v73.
UPDATE 2
This was not caused by an update. I upgraded my SSD and reinstalled Ubuntu 22.04, with all updates Wifi is still working.
Something else must have been broken in my old configuration.
