I have a Dell XPS 13 9360 with a this Intel wifi card: iwlwifi 0000:3a:00.0: Detected Intel(R) Dual Band Wireless AC 3160, REV=0x164 (Note that this laptop did not originally ship with this card. It shipped with a card from another vendor that was so unreliable for suspend/resume endurance testing that I had to replace it. And until now, this Intel card has been performing well) I recently installed Fedora 35, and the card worked fine. But when I built and booted a 5.15 or 5.16 upstream kernel from src, the card fails at initialization and I've not found a way to revive it. (dmesg below) Since the word "Microcode" was involved, I feared there was some mis-match between Fedora and upstream. So I installed Ubuntu 21.10 -- but the same thing happened. wifi worked for the Ubuntu kernel, but not for an upstream 5.16 kernel. (I use a config that starts with the distro config, and is updated with a "make localmodconfig", any any other tweaks to turn off distro-specific stuff that doesn't build upstream) Is this a known problem (with a known solution?) thanks, Len Brown, Intel Open Source Technology Center lenb@lenb-Dell-XPS-13-9360:~$ grep iwlwifi dmesg.ubuntu [ 2.018698] iwlwifi 0000:3a:00.0: enabling device (0000 -> 0002) [ 2.035549] iwlwifi 0000:3a:00.0: loaded firmware version 17.3216344376.0 3160-17.ucode op_mode iwlmvm [ 2.118226] iwlwifi 0000:3a:00.0: Detected Intel(R) Dual Band Wireless AC 3160, REV=0x164 [ 2.144883] iwlwifi 0000:3a:00.0: base HW address: e4:02:9b:c0:4d:f1 [ 3.049603] iwlwifi 0000:3a:00.0 wlp58s0: renamed from wlan0 [ 11.406530] iwlwifi 0000:3a:00.0: Microcode SW error detected. Restarting 0x2000000. [ 11.408338] iwlwifi 0000:3a:00.0: Start IWL Error Log Dump: [ 11.409829] iwlwifi 0000:3a:00.0: Transport status: 0x0000004B, valid: 6 [ 11.411533] iwlwifi 0000:3a:00.0: Loaded firmware version: 17.3216344376.0 3160-17.ucode [ 11.412815] iwlwifi 0000:3a:00.0: 0x00000038 | BAD_COMMAND [ 11.414597] iwlwifi 0000:3a:00.0: 0x000002F0 | trm_hw_status0 [ 11.416155] iwlwifi 0000:3a:00.0: 0x00000000 | trm_hw_status1 [ 11.417542] iwlwifi 0000:3a:00.0: 0x00000B30 | branchlink2 [ 11.419140] iwlwifi 0000:3a:00.0: 0x00014908 | interruptlink1 [ 11.420414] iwlwifi 0000:3a:00.0: 0x00000000 | interruptlink2 [ 11.421799] iwlwifi 0000:3a:00.0: 0xDEADBEEF | data1 [ 11.424074] iwlwifi 0000:3a:00.0: 0xDEADBEEF | data2 [ 11.425305] iwlwifi 0000:3a:00.0: 0xDEADBEEF | data3 [ 11.427531] iwlwifi 0000:3a:00.0: 0x003FE220 | beacon time [ 11.429713] iwlwifi 0000:3a:00.0: 0x00001DDE | tsf low [ 11.432221] iwlwifi 0000:3a:00.0: 0x00000000 | tsf hi [ 11.434755] iwlwifi 0000:3a:00.0: 0x00000000 | time gp1 [ 11.437282] iwlwifi 0000:3a:00.0: 0x00001DE0 | time gp2 [ 11.439847] iwlwifi 0000:3a:00.0: 0x00000000 | uCode revision type [ 11.441340] iwlwifi 0000:3a:00.0: 0x00000011 | uCode version major [ 11.443347] iwlwifi 0000:3a:00.0: 0xBFB58538 | uCode version minor [ 11.445820] iwlwifi 0000:3a:00.0: 0x00000164 | hw version [ 11.448265] iwlwifi 0000:3a:00.0: 0x00C89204 | board version [ 11.450758] iwlwifi 0000:3a:00.0: 0x001E0405 | hcmd [ 11.453217] iwlwifi 0000:3a:00.0: 0x00022080 | isr0 [ 11.455648] iwlwifi 0000:3a:00.0: 0x00000000 | isr1 [ 11.458300] iwlwifi 0000:3a:00.0: 0x00000002 | isr2 [ 11.460747] iwlwifi 0000:3a:00.0: 0x004000C0 | isr3 [ 11.463125] iwlwifi 0000:3a:00.0: 0x00000000 | isr4 [ 11.465510] iwlwifi 0000:3a:00.0: 0x01000112 | last cmd Id [ 11.467867] iwlwifi 0000:3a:00.0: 0x00000000 | wait_event [ 11.470215] iwlwifi 0000:3a:00.0: 0x000000D4 | l2p_control [ 11.472553] iwlwifi 0000:3a:00.0: 0x00000000 | l2p_duration [ 11.474865] iwlwifi 0000:3a:00.0: 0x00000000 | l2p_mhvalid [ 11.477236] iwlwifi 0000:3a:00.0: 0x00000000 | l2p_addr_match [ 11.479364] iwlwifi 0000:3a:00.0: 0x00000007 | lmpm_pmg_sel [ 11.481481] iwlwifi 0000:3a:00.0: 0x15041745 | timestamp [ 11.483595] iwlwifi 0000:3a:00.0: 0x00001828 | flow_handler [ 11.485692] iwlwifi 0000:3a:00.0: Fseq Registers: [ 11.487917] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_ERROR_CODE [ 11.490156] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_TOP_INIT_VERSION [ 11.492372] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_CNVIO_INIT_VERSION [ 11.494577] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_OTP_VERSION [ 11.496734] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_TOP_CONTENT_VERSION [ 11.498586] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_ALIVE_TOKEN [ 11.499921] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_CNVI_ID [ 11.501279] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_CNVR_ID [ 11.502465] iwlwifi 0000:3a:00.0: 0x00000000 | CNVI_AUX_MISC_CHIP [ 11.503572] iwlwifi 0000:3a:00.0: 0x00000000 | CNVR_AUX_MISC_CHIP [ 11.504681] iwlwifi 0000:3a:00.0: 0x00000000 | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM [ 11.505770] iwlwifi 0000:3a:00.0: 0x00000000 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR [ 11.506709] iwlwifi 0000:3a:00.0: Starting mac, retry will be triggered anyway [ 11.507645] iwlwifi 0000:3a:00.0: FW error in SYNC CMD PER_CHAIN_LIMIT_OFFSET_CMD [ 11.508634] iwl_trans_txq_send_hcmd+0x45c/0x470 [iwlwifi] [ 11.508657] iwl_trans_send_cmd+0x66/0xf0 [iwlwifi] [ 11.508926] iwlwifi 0000:3a:00.0: Failed to send MAC context (action:1): -5 [ 11.509884] iwlwifi 0000:3a:00.0: Failed to disable queue 1 (ret=-5) [ 11.510899] iwlwifi 0000:3a:00.0: Failed to remove station. Id=1 [ 11.511864] iwlwifi 0000:3a:00.0: Failed sending remove station [ 11.687220] iwlwifi 0000:3a:00.0: Microcode SW error detected. Restarting 0x2000000. [ 11.687472] iwlwifi 0000:3a:00.0: Start IWL Error Log Dump: [ 11.687475] iwlwifi 0000:3a:00.0: Transport status: 0x0000004B, valid: 6 [ 11.687479] iwlwifi 0000:3a:00.0: Loaded firmware version: 17.3216344376.0 3160-17.ucode [ 11.687481] iwlwifi 0000:3a:00.0: 0x00000038 | BAD_COMMAND [ 11.687484] iwlwifi 0000:3a:00.0: 0x000002F0 | trm_hw_status0 [ 11.687487] iwlwifi 0000:3a:00.0: 0x00000000 | trm_hw_status1 [ 11.687489] iwlwifi 0000:3a:00.0: 0x00000B30 | branchlink2 [ 11.687491] iwlwifi 0000:3a:00.0: 0x00014908 | interruptlink1 [ 11.687493] iwlwifi 0000:3a:00.0: 0x00000000 | interruptlink2 [ 11.687495] iwlwifi 0000:3a:00.0: 0xDEADBEEF | data1 [ 11.687496] iwlwifi 0000:3a:00.0: 0xDEADBEEF | data2 [ 11.687498] iwlwifi 0000:3a:00.0: 0xDEADBEEF | data3 [ 11.687499] iwlwifi 0000:3a:00.0: 0x003FD637 | beacon time [ 11.687501] iwlwifi 0000:3a:00.0: 0x000029C7 | tsf low [ 11.687502] iwlwifi 0000:3a:00.0: 0x00000000 | tsf hi [ 11.687504] iwlwifi 0000:3a:00.0: 0x00000000 | time gp1 [ 11.687506] iwlwifi 0000:3a:00.0: 0x000029C8 | time gp2 [ 11.687508] iwlwifi 0000:3a:00.0: 0x00000000 | uCode revision type [ 11.687509] iwlwifi 0000:3a:00.0: 0x00000011 | uCode version major [ 11.687511] iwlwifi 0000:3a:00.0: 0xBFB58538 | uCode version minor [ 11.687513] iwlwifi 0000:3a:00.0: 0x00000164 | hw version [ 11.687515] iwlwifi 0000:3a:00.0: 0x00C89204 | board version [ 11.687517] iwlwifi 0000:3a:00.0: 0x001D0405 | hcmd [ 11.687519] iwlwifi 0000:3a:00.0: 0x00022080 | isr0 [ 11.687522] iwlwifi 0000:3a:00.0: 0x00000000 | isr1 [ 11.687524] iwlwifi 0000:3a:00.0: 0x00000002 | isr2 [ 11.687526] iwlwifi 0000:3a:00.0: 0x004000C0 | isr3 [ 11.687527] iwlwifi 0000:3a:00.0: 0x00000000 | isr4 [ 11.687530] iwlwifi 0000:3a:00.0: 0x01000112 | last cmd Id [ 11.687532] iwlwifi 0000:3a:00.0: 0x00000000 | wait_event [ 11.687534] iwlwifi 0000:3a:00.0: 0x000000D4 | l2p_control [ 11.687536] iwlwifi 0000:3a:00.0: 0x00000000 | l2p_duration [ 11.687538] iwlwifi 0000:3a:00.0: 0x00000000 | l2p_mhvalid [ 11.687541] iwlwifi 0000:3a:00.0: 0x00000000 | l2p_addr_match [ 11.687543] iwlwifi 0000:3a:00.0: 0x00000007 | lmpm_pmg_sel [ 11.687544] iwlwifi 0000:3a:00.0: 0x15041745 | timestamp [ 11.687546] iwlwifi 0000:3a:00.0: 0x00001828 | flow_handler [ 11.687549] iwlwifi 0000:3a:00.0: Fseq Registers: [ 11.687694] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_ERROR_CODE [ 11.687749] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_TOP_INIT_VERSION [ 11.687804] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_CNVIO_INIT_VERSION [ 11.687859] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_OTP_VERSION [ 11.687914] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_TOP_CONTENT_VERSION [ 11.687964] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_ALIVE_TOKEN [ 11.688019] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_CNVI_ID [ 11.688074] iwlwifi 0000:3a:00.0: 0x00000000 | FSEQ_CNVR_ID [ 11.688130] iwlwifi 0000:3a:00.0: 0x00000000 | CNVI_AUX_MISC_CHIP [ 11.688185] iwlwifi 0000:3a:00.0: 0x00000000 | CNVR_AUX_MISC_CHIP [ 11.688240] iwlwifi 0000:3a:00.0: 0x00000000 | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM [ 11.688295] iwlwifi 0000:3a:00.0: 0x00000000 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR [ 11.688299] iwlwifi 0000:3a:00.0: Starting mac, retry will be triggered anyway [ 11.688317] iwlwifi 0000:3a:00.0: FW error in SYNC CMD PER_CHAIN_LIMIT_OFFSET_CMD [ 11.688339] iwl_trans_txq_send_hcmd+0x45c/0x470 [iwlwifi] [ 11.688366] iwl_trans_send_cmd+0x66/0xf0 [iwlwifi] ...
