Xubuntu 22.04.1を実行するDell Latitute 5420があります。デュアルバンドWiFiネットワーク（2.4/5Ghz）に接続されています。
WiFi接続が切断され続けます。自動的に再接続されないことがよくあります。いくつかのトラブルシューティングを行いましたが、当時複数のコンピュータを使用して発見したものは次のとおりです。
- Xubuntu 22.04.1 がインストールされている Dell Latitute 5420 の接続が失われると、Windows 11 がインストールされているノートブックは切断されません。これは、自動帯域、2.4GHz帯、5GHz帯で発生します。
- XubuntuがインストールされているDell Latitute 5420が切断された場合、Xubuntu 22.04.1がインストールされているDell XPS15（以前のノートブック）も切断されません。これは、自動帯域、2.4GHz帯、5GHz帯で発生します。
これはハードウェアの問題のようです。
私が考えるイベントのsyslog出力は次のとおりです。
Jan 27 12:22:20 lucho-dell wpa_supplicant[940]: wlp0s20f3: CTRL-EVENT-SCAN-FAILED ret=-5
Jan 27 12:22:20 lucho-dell kernel: [249880.171155] iwlwifi 0000:00:14.3: Microcode SW error detected. Restarting 0x0.
Jan 27 12:22:20 lucho-dell kernel: [249880.171256] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
Jan 27 12:22:20 lucho-dell kernel: [249880.171259] iwlwifi 0000:00:14.3: Transport status: 0x0000004B, valid: 6
Jan 27 12:22:20 lucho-dell kernel: [249880.171262] iwlwifi 0000:00:14.3: Loaded firmware version: 66.f1c864e0.0 QuZ-a0-hr-b0-66.ucode
Jan 27 12:22:20 lucho-dell kernel: [249880.171266] iwlwifi 0000:00:14.3: 0x00000071 | NMI_INTERRUPT_UMAC_FATAL
Jan 27 12:22:20 lucho-dell kernel: [249880.171269] iwlwifi 0000:00:14.3: 0x0000A200 | trm_hw_status0
Jan 27 12:22:20 lucho-dell kernel: [249880.171272] iwlwifi 0000:00:14.3: 0x00000000 | trm_hw_status1
Jan 27 12:22:20 lucho-dell kernel: [249880.171275] iwlwifi 0000:00:14.3: 0x004CB01A | branchlink2
Jan 27 12:22:20 lucho-dell kernel: [249880.171277] iwlwifi 0000:00:14.3: 0x004C183E | interruptlink1
Jan 27 12:22:20 lucho-dell kernel: [249880.171279] iwlwifi 0000:00:14.3: 0x004C183E | interruptlink2
Jan 27 12:22:20 lucho-dell kernel: [249880.171281] iwlwifi 0000:00:14.3: 0x0000B278 | data1
Jan 27 12:22:20 lucho-dell kernel: [249880.171284] iwlwifi 0000:00:14.3: 0x00001000 | data2
Jan 27 12:22:20 lucho-dell kernel: [249880.171286] iwlwifi 0000:00:14.3: 0x00000000 | data3
Jan 27 12:22:20 lucho-dell kernel: [249880.171288] iwlwifi 0000:00:14.3: 0x10807465 | beacon time
Jan 27 12:22:20 lucho-dell kernel: [249880.171291] iwlwifi 0000:00:14.3: 0xDE4E1E30 | tsf low
Jan 27 12:22:20 lucho-dell kernel: [249880.171293] iwlwifi 0000:00:14.3: 0x00000038 | tsf hi
Jan 27 12:22:20 lucho-dell kernel: [249880.171295] iwlwifi 0000:00:14.3: 0x00000000 | time gp1
Jan 27 12:22:20 lucho-dell kernel: [249880.171297] iwlwifi 0000:00:14.3: 0x07D1C197 | time gp2
Jan 27 12:22:20 lucho-dell kernel: [249880.171300] iwlwifi 0000:00:14.3: 0x00000001 | uCode revision type
Jan 27 12:22:20 lucho-dell kernel: [249880.171302] iwlwifi 0000:00:14.3: 0x00000042 | uCode version major
Jan 27 12:22:20 lucho-dell kernel: [249880.171305] iwlwifi 0000:00:14.3: 0xF1C864E0 | uCode version minor
Jan 27 12:22:20 lucho-dell kernel: [249880.171307] iwlwifi 0000:00:14.3: 0x00000351 | hw version
Jan 27 12:22:20 lucho-dell kernel: [249880.171309] iwlwifi 0000:00:14.3: 0x00489004 | board version
Jan 27 12:22:20 lucho-dell kernel: [249880.171312] iwlwifi 0000:00:14.3: 0x80CBFC03 | hcmd
Jan 27 12:22:20 lucho-dell kernel: [249880.171314] iwlwifi 0000:00:14.3: 0x24020000 | isr0
Jan 27 12:22:20 lucho-dell kernel: [249880.171316] iwlwifi 0000:00:14.3: 0x00400000 | isr1
Jan 27 12:22:20 lucho-dell kernel: [249880.171318] iwlwifi 0000:00:14.3: 0x08F00002 | isr2
Jan 27 12:22:20 lucho-dell kernel: [249880.171320] iwlwifi 0000:00:14.3: 0x00C00008 | isr3
Jan 27 12:22:20 lucho-dell kernel: [249880.171323] iwlwifi 0000:00:14.3: 0x00000000 | isr4
Jan 27 12:22:20 lucho-dell kernel: [249880.171325] iwlwifi 0000:00:14.3: 0x057E001C | last cmd Id
Jan 27 12:22:20 lucho-dell kernel: [249880.171327] iwlwifi 0000:00:14.3: 0x0000B278 | wait_event
Jan 27 12:22:20 lucho-dell kernel: [249880.171329] iwlwifi 0000:00:14.3: 0x000000B4 | l2p_control
Jan 27 12:22:20 lucho-dell kernel: [249880.171331] iwlwifi 0000:00:14.3: 0x00018034 | l2p_duration
Jan 27 12:22:20 lucho-dell kernel: [249880.171334] iwlwifi 0000:00:14.3: 0x0000000F | l2p_mhvalid
Jan 27 12:22:20 lucho-dell kernel: [249880.171336] iwlwifi 0000:00:14.3: 0x000000C7 | l2p_addr_match
Jan 27 12:22:20 lucho-dell kernel: [249880.171338] iwlwifi 0000:00:14.3: 0x00000009 | lmpm_pmg_sel
Jan 27 12:22:20 lucho-dell kernel: [249880.171340] iwlwifi 0000:00:14.3: 0x00000000 | timestamp
Jan 27 12:22:20 lucho-dell kernel: [249880.171343] iwlwifi 0000:00:14.3: 0x00001070 | flow_handler
Jan 27 12:22:20 lucho-dell kernel: [249880.171387] iwlwifi 0000:00:14.3: Start IWL Error Log Dump:
Jan 27 12:22:20 lucho-dell kernel: [249880.171389] iwlwifi 0000:00:14.3: Transport status: 0x0000004B, valid: 7
Jan 27 12:22:20 lucho-dell kernel: [249880.171392] iwlwifi 0000:00:14.3: 0x20003463 | ADVANCED_SYSASSERT
Jan 27 12:22:20 lucho-dell kernel: [249880.171394] iwlwifi 0000:00:14.3: 0x00000000 | umac branchlink1
Jan 27 12:22:20 lucho-dell kernel: [249880.171397] iwlwifi 0000:00:14.3: 0x80455AE6 | umac branchlink2
Jan 27 12:22:20 lucho-dell kernel: [249880.171399] iwlwifi 0000:00:14.3: 0x804631C0 | umac interruptlink1
Jan 27 12:22:20 lucho-dell kernel: [249880.171402] iwlwifi 0000:00:14.3: 0x00000000 | umac interruptlink2
Jan 27 12:22:20 lucho-dell kernel: [249880.171404] iwlwifi 0000:00:14.3: 0xDE4E1E24 | umac data1
Jan 27 12:22:20 lucho-dell kernel: [249880.171406] iwlwifi 0000:00:14.3: 0x07D1C18A | umac data2
Jan 27 12:22:20 lucho-dell kernel: [249880.171408] iwlwifi 0000:00:14.3: 0xDE43B249 | umac data3
Jan 27 12:22:20 lucho-dell kernel: [249880.171411] iwlwifi 0000:00:14.3: 0x00000042 | umac major
Jan 27 12:22:20 lucho-dell kernel: [249880.171413] iwlwifi 0000:00:14.3: 0xF1C864E0 | umac minor
Jan 27 12:22:20 lucho-dell kernel: [249880.171415] iwlwifi 0000:00:14.3: 0x07D1C191 | frame pointer
Jan 27 12:22:20 lucho-dell kernel: [249880.171417] iwlwifi 0000:00:14.3: 0xC0885DEC | stack pointer
Jan 27 12:22:20 lucho-dell kernel: [249880.171419] iwlwifi 0000:00:14.3: 0x0074010D | last host cmd
Jan 27 12:22:20 lucho-dell kernel: [249880.171422] iwlwifi 0000:00:14.3: 0x00000000 | isr status reg
Jan 27 12:22:20 lucho-dell kernel: [249880.171445] iwlwifi 0000:00:14.3: IML/ROM dump:
Jan 27 12:22:20 lucho-dell kernel: [249880.171447] iwlwifi 0000:00:14.3: 0x00000003 | IML/ROM error/state
Jan 27 12:22:20 lucho-dell kernel: [249880.171475] iwlwifi 0000:00:14.3: 0x000059EB | IML/ROM data1
Jan 27 12:22:20 lucho-dell kernel: [249880.171486] iwlwifi 0000:00:14.3: 0x00000080 | IML/ROM WFPM_AUTH_KEY_0
Jan 27 12:22:20 lucho-dell kernel: [249880.171511] iwlwifi 0000:00:14.3: Fseq Registers:
Jan 27 12:22:20 lucho-dell kernel: [249880.171533] iwlwifi 0000:00:14.3: 0x60000000 | FSEQ_ERROR_CODE
Jan 27 12:22:20 lucho-dell kernel: [249880.171538] iwlwifi 0000:00:14.3: 0x80290033 | FSEQ_TOP_INIT_VERSION
Jan 27 12:22:20 lucho-dell kernel: [249880.171560] iwlwifi 0000:00:14.3: 0x00090006 | FSEQ_CNVIO_INIT_VERSION
Jan 27 12:22:20 lucho-dell kernel: [249880.171565] iwlwifi 0000:00:14.3: 0x0000A482 | FSEQ_OTP_VERSION
Jan 27 12:22:20 lucho-dell kernel: [249880.171587] iwlwifi 0000:00:14.3: 0x00000003 | FSEQ_TOP_CONTENT_VERSION
Jan 27 12:22:20 lucho-dell kernel: [249880.171592] iwlwifi 0000:00:14.3: 0x4552414E | FSEQ_ALIVE_TOKEN
Jan 27 12:22:20 lucho-dell kernel: [249880.171614] iwlwifi 0000:00:14.3: 0x20000302 | FSEQ_CNVI_ID
Jan 27 12:22:20 lucho-dell kernel: [249880.171637] iwlwifi 0000:00:14.3: 0x01300504 | FSEQ_CNVR_ID
Jan 27 12:22:20 lucho-dell kernel: [249880.171660] iwlwifi 0000:00:14.3: 0x20000302 | CNVI_AUX_MISC_CHIP
Jan 27 12:22:20 lucho-dell kernel: [249880.171686] iwlwifi 0000:00:14.3: 0x01300504 | CNVR_AUX_MISC_CHIP
Jan 27 12:22:20 lucho-dell kernel: [249880.171710] iwlwifi 0000:00:14.3: 0x05B0905B | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
Jan 27 12:22:20 lucho-dell kernel: [249880.171734] iwlwifi 0000:00:14.3: 0x0000025B | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
Jan 27 12:22:20 lucho-dell kernel: [249880.171900] iwlwifi 0000:00:14.3: WRT: Collecting data: ini trigger 4 fired (delay=0ms).
Jan 27 12:22:20 lucho-dell kernel: [249880.171909] ieee80211 phy0: Hardware restart was requested
Jan 27 12:22:20 lucho-dell kernel: [249880.171931] iwlwifi 0000:00:14.3: FW error in SYNC CMD SCAN_REQ_UMAC
Jan 27 12:22:20 lucho-dell kernel: [249880.171944] CPU: 4 PID: 940 Comm: wpa_supplicant Tainted: G W 5.15.0-56-generic #62-Ubuntu
Jan 27 12:22:20 lucho-dell kernel: [249880.171950] Hardware name: Dell Inc. Latitude 5420/0HC01N, BIOS 1.15.1 12/20/2021
Jan 27 12:22:20 lucho-dell kernel: [249880.171952] Call Trace:
Jan 27 12:22:20 lucho-dell kernel: [249880.171955] <TASK>
Jan 27 12:22:20 lucho-dell kernel: [249880.171959] show_stack+0x52/0x5c
Jan 27 12:22:20 lucho-dell kernel: [249880.171966] dump_stack_lvl+0x4a/0x63
Jan 27 12:22:20 lucho-dell kernel: [249880.171975] dump_stack+0x10/0x16
Jan 27 12:22:20 lucho-dell kernel: [249880.171981] iwl_trans_txq_send_hcmd_sync+0x349/0x360 [iwlwifi]
Jan 27 12:22:20 lucho-dell kernel: [249880.172015] ? wait_woken+0x70/0x70
Jan 27 12:22:20 lucho-dell kernel: [249880.172021] iwl_trans_txq_send_hcmd+0xae/0x150 [iwlwifi]
Jan 27 12:22:20 lucho-dell kernel: [249880.172050] iwl_trans_send_cmd+0x84/0x110 [iwlwifi]
Jan 27 12:22:20 lucho-dell kernel: [249880.172081] iwl_mvm_send_cmd+0x38/0x80 [iwlmvm]
Jan 27 12:22:20 lucho-dell kernel: [249880.172107] iwl_mvm_reg_scan_start+0x2ec/0x400 [iwlmvm]
Jan 27 12:22:20 lucho-dell kernel: [249880.172141] iwl_mvm_mac_hw_scan+0x50/0x80 [iwlmvm]
Jan 27 12:22:20 lucho-dell kernel: [249880.172161] drv_hw_scan+0x43/0x130 [mac80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172216] __ieee80211_start_scan+0x166/0x690 [mac80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172265] ? __free_pages+0xad/0xc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172271] ieee80211_request_scan+0x30/0x60 [mac80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172320] ieee80211_scan+0x66/0x100 [mac80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172379] rdev_scan+0x2a/0xb0 [cfg80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172430] cfg80211_scan+0xe3/0x120 [cfg80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172473] nl80211_trigger_scan+0x47e/0x930 [cfg80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172526] genl_family_rcv_msg_doit+0xe4/0x150
Jan 27 12:22:20 lucho-dell kernel: [249880.172533] genl_rcv_msg+0xe2/0x1f0
Jan 27 12:22:20 lucho-dell kernel: [249880.172536] ? nl80211_send_scan_start+0xb0/0xb0 [cfg80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172586] ? genl_get_cmd+0xe0/0xe0
Jan 27 12:22:20 lucho-dell kernel: [249880.172589] netlink_rcv_skb+0x53/0x100
Jan 27 12:22:20 lucho-dell kernel: [249880.172593] genl_rcv+0x29/0x40
Jan 27 12:22:20 lucho-dell kernel: [249880.172596] netlink_unicast+0x220/0x340
Jan 27 12:22:20 lucho-dell kernel: [249880.172599] netlink_sendmsg+0x24b/0x4c0
Jan 27 12:22:20 lucho-dell kernel: [249880.172603] sock_sendmsg+0x66/0x70
Jan 27 12:22:20 lucho-dell kernel: [249880.172608] ____sys_sendmsg+0x252/0x290
Jan 27 12:22:20 lucho-dell kernel: [249880.172611] ? import_iovec+0x31/0x40
Jan 27 12:22:20 lucho-dell kernel: [249880.172618] ? sendmsg_copy_msghdr+0x7f/0xa0
Jan 27 12:22:20 lucho-dell kernel: [249880.172623] ___sys_sendmsg+0x81/0xc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172628] ? unix_ioctl+0x168/0x1e0
Jan 27 12:22:20 lucho-dell kernel: [249880.172633] ? __check_object_size.part.0+0x3a/0x150
Jan 27 12:22:20 lucho-dell kernel: [249880.172639] ? sock_do_ioctl+0x42/0x100
Jan 27 12:22:20 lucho-dell kernel: [249880.172643] ? __check_object_size.part.0+0x3a/0x150
Jan 27 12:22:20 lucho-dell kernel: [249880.172647] __sys_sendmsg+0x62/0xc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172652] __x64_sys_sendmsg+0x1d/0x30
Jan 27 12:22:20 lucho-dell kernel: [249880.172657] do_syscall_64+0x59/0xc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172662] ? exit_to_user_mode_prepare+0x37/0xb0
Jan 27 12:22:20 lucho-dell kernel: [249880.172667] ? syscall_exit_to_user_mode+0x27/0x50
Jan 27 12:22:20 lucho-dell kernel: [249880.172671] ? __x64_sys_setsockopt+0x1f/0x30
Jan 27 12:22:20 lucho-dell kernel: [249880.172676] ? do_syscall_64+0x69/0xc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172679] ? exit_to_user_mode_prepare+0x37/0xb0
Jan 27 12:22:20 lucho-dell kernel: [249880.172683] ? syscall_exit_to_user_mode+0x27/0x50
Jan 27 12:22:20 lucho-dell kernel: [249880.172687] ? __x64_sys_getsockopt+0x1f/0x30
Jan 27 12:22:20 lucho-dell kernel: [249880.172691] ? do_syscall_64+0x69/0xc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172694] ? do_syscall_64+0x69/0xc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172697] ? do_syscall_64+0x69/0xc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172700] entry_SYSCALL_64_after_hwframe+0x61/0xcb
Jan 27 12:22:20 lucho-dell kernel: [249880.172706] RIP: 0033:0x7f8b34585b17
Jan 27 12:22:20 lucho-dell kernel: [249880.172712] Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
Jan 27 12:22:20 lucho-dell kernel: [249880.172715] RSP: 002b:00007fff99e79138 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
Jan 27 12:22:20 lucho-dell kernel: [249880.172720] RAX: ffffffffffffffda RBX: 0000564942aa1ac0 RCX: 00007f8b34585b17
Jan 27 12:22:20 lucho-dell kernel: [249880.172723] RDX: 0000000000000000 RSI: 00007fff99e79170 RDI: 0000000000000006
Jan 27 12:22:20 lucho-dell kernel: [249880.172725] RBP: 0000564942aa1da0 R08: 0000000000000004 R09: 0000564942bd4bc0
Jan 27 12:22:20 lucho-dell kernel: [249880.172727] R10: 00007fff99e79250 R11: 0000000000000246 R12: 0000564942aa3380
Jan 27 12:22:20 lucho-dell kernel: [249880.172729] R13: 00007fff99e79170 R14: 0000000000000000 R15: 0000000000000000
Jan 27 12:22:20 lucho-dell kernel: [249880.172733] </TASK>
Jan 27 12:22:20 lucho-dell kernel: [249880.172737] iwlwifi 0000:00:14.3: Scan failed! ret -5
Jan 27 12:22:20 lucho-dell kernel: [249880.172824] ------------[ cut here ]------------
Jan 27 12:22:20 lucho-dell kernel: [249880.172827] WARNING: CPU: 5 PID: 64910 at net/mac80211/scan.c:436 __ieee80211_scan_completed+0x342/0x360 [mac80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.172895] Modules linked in: ccm rfcomm cmac algif_hash algif_skcipher af_alg snd_hda_codec_hdmi bnep ip6t_REJECT nf_reject_ipv6 xt_hl ip6_tables ip6t_rt btusb uvcvideo btrtl btbcm videobuf2_vmalloc videobuf2_memops btintel videobuf2_v4l2 bluetooth videobuf2_common videodev ipt_REJECT nf_reject_ipv4 ecdh_generic xt_LOG mc ecc snd_ctl_led snd_hda_codec_realtek snd_hda_codec_generic nf_log_syslog nft_limit intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp snd_sof_pci_intel_tgl snd_sof_intel_hda_common soundwire_intel soundwire_generic_allocation soundwire_cadence snd_sof_intel_hda snd_sof_pci snd_sof_xtensa_dsp snd_sof snd_soc_hdac_hda snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi soundwire_bus snd_soc_core xt_limit xt_addrtype snd_compress ac97_bus xt_tcpudp snd_pcm_dmaengine snd_hda_intel xt_conntrack snd_intel_dspcfg dell_rbtn coretemp snd_intel_sdw_acpi nf_conntrack mei_hdcp snd_hda_codec nf_defrag_ipv6 nf_defrag_ipv4 snd_hda_core nft_compat joydev dell_laptop
Jan 27 12:22:20 lucho-dell kernel: [249880.172995] snd_hwdep kvm_intel intel_rapl_msr nft_counter binfmt_misc kvm snd_pcm dell_wmi ledtrig_audio i915 crct10dif_pclmul snd_seq_midi snd_seq_midi_event ghash_clmulni_intel snd_rawmidi iwlmvm aesni_intel crypto_simd cryptd mac80211 snd_seq nf_tables snd_seq_device ttm libcrc32c nfnetlink intel_cstate dell_smbios input_leds libarc4 drm_kms_helper snd_timer dcdbas serio_raw dell_wmi_sysman firmware_attributes_class iwlwifi dell_wmi_descriptor nls_iso8859_1 wmi_bmof cec snd rc_core processor_thermal_device_pci_legacy mei_me i2c_algo_bit processor_thermal_device processor_thermal_rfim hid_multitouch soundcore mei cfg80211 cros_ec_ishtp fb_sys_fops ucsi_acpi processor_thermal_mbox cros_ec syscopyarea processor_thermal_rapl typec_ucsi sysfillrect intel_rapl_common typec sysimgblt intel_soc_dts_iosf igen6_edac mac_hid int3403_thermal int340x_thermal_zone intel_hid sparse_keymap int3400_thermal acpi_thermal_rel acpi_pad acpi_tad sch_fq_codel msr parport_pc ppdev lp drm ramoops parport
Jan 27 12:22:20 lucho-dell kernel: [249880.173116] reed_solomon pstore_blk pstore_zone efi_pstore ip_tables x_tables autofs4 usbhid hid_sensor_custom hid_sensor_hub intel_ishtp_loader intel_ishtp_hid hid_generic nvme rtsx_pci_sdmmc nvme_core crc32_pclmul psmouse e1000e i2c_i801 intel_lpss_pci i2c_smbus intel_lpss rtsx_pci ahci idma64 xhci_pci libahci intel_ish_ipc thunderbolt intel_ishtp vmd xhci_pci_renesas i2c_hid_acpi wmi i2c_hid hid video pinctrl_tigerlake
Jan 27 12:22:20 lucho-dell kernel: [249880.173181] CPU: 5 PID: 64910 Comm: kworker/u16:0 Tainted: G W 5.15.0-56-generic #62-Ubuntu
Jan 27 12:22:20 lucho-dell kernel: [249880.173188] Hardware name: Dell Inc. Latitude 5420/0HC01N, BIOS 1.15.1 12/20/2021
Jan 27 12:22:20 lucho-dell kernel: [249880.173191] Workqueue: phy0 ieee80211_scan_work [mac80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.173278] RIP: 0010:__ieee80211_scan_completed+0x342/0x360 [mac80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.173354] Code: 0f a3 05 71 8a fc c3 0f 83 d3 fe ff ff 48 8b 05 44 29 0e 00 48 85 c0 74 0c 48 8b 78 08 4c 89 e6 e8 13 27 04 00 e9 b6 fe ff ff <0f> 0b 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 66 66 2e 0f 1f
Jan 27 12:22:20 lucho-dell kernel: [249880.173358] RSP: 0018:ffffb0edc0ba7dd8 EFLAGS: 00010246
Jan 27 12:22:20 lucho-dell kernel: [249880.173363] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff9c494820bf00
Jan 27 12:22:20 lucho-dell kernel: [249880.173367] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff9c49479d8820
Jan 27 12:22:20 lucho-dell kernel: [249880.173370] RBP: ffffb0edc0ba7e00 R08: 0000000000000000 R09: 0000000000000000
Jan 27 12:22:20 lucho-dell kernel: [249880.173372] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9c49479d8820
Jan 27 12:22:20 lucho-dell kernel: [249880.173375] R13: ffff9c49479d9ab8 R14: 0000000000000000 R15: 0000000000000001
Jan 27 12:22:20 lucho-dell kernel: [249880.173378] FS: 0000000000000000(0000) GS:ffff9c4cbfb40000(0000) knlGS:0000000000000000
Jan 27 12:22:20 lucho-dell kernel: [249880.173382] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 27 12:22:20 lucho-dell kernel: [249880.173385] CR2: 00007feb4f1c4000 CR3: 00000004556c6005 CR4: 0000000000770ee0
Jan 27 12:22:20 lucho-dell kernel: [249880.173389] PKRU: 55555554
Jan 27 12:22:20 lucho-dell kernel: [249880.173391] Call Trace:
Jan 27 12:22:20 lucho-dell kernel: [249880.173393] <TASK>
Jan 27 12:22:20 lucho-dell kernel: [249880.173397] ieee80211_scan_work+0x161/0x660 [mac80211]
Jan 27 12:22:20 lucho-dell kernel: [249880.173494] ? finish_task_switch.isra.0+0x7e/0x280
Jan 27 12:22:20 lucho-dell kernel: [249880.173504] process_one_work+0x228/0x3d0
Jan 27 12:22:20 lucho-dell kernel: [249880.173510] worker_thread+0x53/0x420
Jan 27 12:22:20 lucho-dell kernel: [249880.173515] ? process_one_work+0x3d0/0x3d0
Jan 27 12:22:20 lucho-dell kernel: [249880.173521] kthread+0x127/0x150
Jan 27 12:22:20 lucho-dell kernel: [249880.173528] ? set_kthread_struct+0x50/0x50
Jan 27 12:22:20 lucho-dell kernel: [249880.173535] ret_from_fork+0x1f/0x30
Jan 27 12:22:20 lucho-dell kernel: [249880.173545] </TASK>
Jan 27 12:22:20 lucho-dell kernel: [249880.173548] ---[ end trace f9de41dca055e0f8 ]---
Jan 27 12:22:21 lucho-dell wpa_supplicant[940]: wlp0s20f3: CTRL-EVENT-REGDOM-CHANGE init=DRIVER type=WORLD
Jan 27 12:22:33 lucho-dell wpa_supplicant[940]: wlp0s20f3: CTRL-EVENT-SIGNAL-CHANGE above=0 signal=-69 noise=9999 txrate=73100
Jan 27 12:25:42 lucho-dell kernel: [250081.392050] kauditd_printk_skb: 15 callbacks suppressed
Jan 27 12:25:42 lucho-dell kernel: [250081.392055] audit: type=1400 audit(1674833142.077:1582): apparmor="ALLOWED" operation="connect" profile="libreoffice-oosplash" name="/tmp/OSL_PIPE_1000_SingleOfficeIPC_a378c46f207014c8c028212a44a032d6" pid=72189 comm="oosplash" requested_mask="wr" denied_mask="wr" fsuid=1000 ouid=1000
Jan 27 12:25:42 lucho-dell kernel: [250081.392065] audit: type=1400 audit(1674833142.077:1583): apparmor="ALLOWED" operation="file_perm" profile="libreoffice-oosplash" name="/tmp/OSL_PIPE_1000_SingleOfficeIPC_a378c46f207014c8c028212a44a032d6" pid=72189 comm="oosplash" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000
Jan 27 12:25:42 lucho-dell kernel: [250081.392071] audit: type=1400 audit(1674833142.077:1584): apparmor="ALLOWED" operation="file_perm" profile="libreoffice-oosplash" name="/tmp/OSL_PIPE_1000_SingleOfficeIPC_a378c46f207014c8c028212a44a032d6" pid=72189 comm="oosplash" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000
Jan 27 12:25:42 lucho-dell kernel: [250081.392140] audit: type=1400 audit(1674833142.077:1585): apparmor="ALLOWED" operation="file_perm" profile="libreoffice-oosplash" name="/tmp/OSL_PIPE_1000_SingleOfficeIPC_a378c46f207014c8c028212a44a032d6" pid=72189 comm="oosplash" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000
Jan 27 12:25:42 lucho-dell kernel: [250081.392146] audit: type=1400 audit(1674833142.077:1586): apparmor="ALLOWED" operation="file_perm" profile="libreoffice-oosplash" name="/tmp/OSL_PIPE_1000_SingleOfficeIPC_a378c46f207014c8c028212a44a032d6" pid=72189 comm="oosplash" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000
ネットワークデバイス情報は次のとおりです。
Device-1: Intel Wi-Fi 6 AX201 driver: iwlwifi
IF: wlp0s20f3
ログファイルには、CTRL-EVENT-SCAN-FAILED ret=-5後続のハードウェア再起動要求に関する情報が表示されます。何が問題なのかわかりますか？