Fedora 31 - issues with
Intel Corporation Dual Band Wireless-AC 3168NGW
Hardware: HP HP 250 G6 Notebook PC/832A, BIOS F.40 05/16/2018
1) kernel version 5.3.4-300.fc31.x86
2) error in dmesg after loading iwlwifi module
[ 532.645575] iwlwifi 0000:02:00.0 wlo1: renamed from wlan0
[ 536.245635] iwlwifi 0000:02:00.0: Microcode SW error detected. Restarting 0x82000000.
....
[ 536.246839] iwlwifi 0000:02:00.0: 0x00000000 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
[ 536.246871] iwlwifi 0000:02:00.0: Collecting data: trigger 2 fired.
[ 536.246879] ieee80211 phy2: Hardware restart was requested
[ 536.246892] iwlwifi 0000:02:00.0: FW Error notification: type 0x00000000 cmd_id 0x05
[ 536.246896] iwlwifi 0000:02:00.0: FW Error notification: seq 0x002D service 0x00000005
[ 536.246899] iwlwifi 0000:02:00.0: FW Error notification: timestamp 0x0000000000340F64
[ 536.246937] iwlwifi 0000:02:00.0: iwlwifi transaction failed, dumping registers
[ 536.246942] iwlwifi 0000:02:00.0: iwlwifi device config registers:
[ 536.247940] iwlwifi 0000:02:00.0: 00000000: 24fb8086 00100406 02800010 00000010 b1000004 00000000 00000000 00000000
[ 536.247946] iwlwifi 0000:02:00.0: 00000020: 00000000 00000000 00000000 21108086 00000000 000000c8 00000000 0000010b
...
536.248931] iwlwifi 0000:02:00.0: FW error in SYNC CMD GEO_TX_POWER_LIMIT
[ 536.248938] CPU: 2 PID: 145 Comm: kworker/2:1 Not tainted 5.3.4-300.fc31.x86_64 #1
[ 536.248940] Hardware name: HP HP 250 G6 Notebook PC/832A, BIOS F.40 05/16/2018
[ 536.248982] Workqueue: events iwl_mvm_async_handlers_wk [iwlmvm]
[ 536.248986] Call Trace:
[ 536.249004] dump_stack+0x5c/0x80
[ 536.249039] iwl_trans_pcie_send_hcmd+0x506/0x520 [iwlwifi]
[ 536.249053] ? finish_wait+0x80/0x80
[ 536.249088] iwl_trans_send_cmd+0x59/0xb0 [iwlwifi]
[ 536.249125] iwl_mvm_send_cmd+0x2e/0x80 [iwlmvm]
[ 536.249157] iwl_mvm_get_sar_geo_profile+0xa2/0x120 [iwlmvm]
[ 536.249195] iwl_mvm_rx_chub_update_mcc+0xff/0x190 [iwlmvm]
[ 536.249230] iwl_mvm_async_handlers_wk+0xa3/0x140 [iwlmvm]
[ 536.249243] process_one_work+0x19d/0x340
[ 536.249253] worker_thread+0x50/0x3b0
[ 536.249262] kthread+0xfb/0x130
[ 536.249271] ? process_one_work+0x340/0x340
[ 536.249277] ? kthread_park+0x80/0x80
[ 536.249287] ret_from_fork+0x35/0x40
[ 536.249320] iwlwifi 0000:02:00.0: Failed to get geographic profile info -5
[ 536.252948] ------------[ cut here ]------------
3) solution - remove or rename file: /lib/firmware/iwlwifi-3168-29.ucode
# mv /lib/firmware/iwlwifi-3168-29.ucode /lib/firmware/iwlwifi-3168-29.ucode.DISABLED
4) reload iwlwifi module
# rmmod iwlmvm
# rmmod iwlwifi
# modprobe iwlwifi
5) TODO: update bios firmware to latest one
