Recently I have come across a bug where my WiFi disconnects, and I am unable to find a network until I reboot my computer. I run Lubuntu only and didn't start having this issue for several months of use. I have not had the opportunity to test if this same issue exists over a wired connection.
The only temporary fix I have found to this problem is to reboot my computer, but even then, it only starts working again around 75% of the time. When the WiFi is working, it typically lasts around 0-15 minutes before disconnecting. I've noticed that when I leave the computer on but don't open Chrome/Firefox it tends to last longer before crashing.
When I get disconnected I get a notification such as this on my taskbar.
10/23/21 10:59 AM - NetworkManager(nm-tray): Connection Lost
I've only been able to trace the issue to my Network Controller becoming Unclaimed and my computer failing to recognize my wireless device, phy0. But obviously it's not that simple.
This is seen when comparing sudo lshw -C network and rfkill list before and after the WiFi disconnects.
sudo lshw -C network before crash
*-network
description: Wireless interface
product: Wireless 8265 / 8275
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:3f:00.0
logical name: wlp63s0
version: 78
serial: ac:ed:5c:d9:2a:06
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.11.0-38-generic firmware=36.77d01142.0 8265-36.ucode ip=10.10.79.178 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:135 memory:8a200000-8a201fff
sudo lshw -C network after crash
*-network UNCLAIMED
description: Network controller
product: Wireless 8265 / 8275
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:3f:00.0
version: 78
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress cap_list
configuration: latency=0
resources: memory:8a200000-8a201fff
rfkill list before crash
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
3: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
rfkill list after crash
0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no
1: ideapad_bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
What I've tried
I have tried too many random solutions to keep track of, but here are some recent ones I feel confident in describing:
Reinstalled a fresh copy of Lubuntu 21.10. Problem persisted before making any changes to the system.
Reinstalled a fresh copy of Lubuntu 20.04.3 LTS. Problem persisted before making any changes to the system.
Disabling wifi power management as seen here. I didn't notice any improvements so I reverted this change.
Removing and reinserting wifi module with sudo modprobe -r iwlwifi and sudo modprobe iwlwifi
Stopping/disabling/starting/enabling NetworkManager.service and network-manager.service
sudo systemctl stop NetworkManager.service
sudo systemctl disable NetworkManager.service
sudo systemctl start NetworkManager.service
sudo systemctl enable NetworkManager.service
sudo systemctl stop network-manager.service
sudo systemctl disable network-manager.service
sudo systemctl start network-manager.service
sudo systemctl enable network-manager.service
If this is a driver issue that will be solved by uninstalling/installing different drivers, I'm worried I will break something and I won't be able to connect at all. The fact that I even get a few minutes of connection has kept me hopeful.
Some extra, hopefully relevant information
lspci -k
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
Subsystem: Lenovo Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers
Kernel driver in use: skl_uncore
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
Subsystem: Lenovo HD Graphics 620
Kernel driver in use: i915
Kernel modules: i915
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/ E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 02)
Subsystem: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Proces sor Thermal Subsystem
Kernel driver in use: proc_thermal
Kernel modules: processor_thermal_device
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
Subsystem: Lenovo Sunrise Point-LP USB 3.0 xHCI Controller
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
Subsystem: Lenovo Sunrise Point-LP Thermal subsystem
Kernel driver in use: intel_pch_thermal
Kernel modules: intel_pch_thermal
00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
Subsystem: Lenovo Sunrise Point-LP Serial IO I2C Controller
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 (rev 21)
Subsystem: Lenovo Sunrise Point-LP Serial IO I2C Controller
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:15.2 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #2 (rev 21)
Subsystem: Lenovo Sunrise Point-LP Serial IO I2C Controller
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
Subsystem: Lenovo Sunrise Point-LP CSME HECI
Kernel driver in use: mei_me
Kernel modules: mei_me
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1)
Kernel driver in use: pcieport
00:1c.2 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #3 (rev f1)
Kernel driver in use: pcieport
00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 (rev f1)
Kernel driver in use: pcieport
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1)
Kernel driver in use: pcieport
00:1e.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO UART Controller #0 (rev 21)
Subsystem: Lenovo Sunrise Point-LP Serial IO UART Controller
Kernel driver in use: intel-lpss
Kernel modules: intel_lpss_pci
00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC Controller/eSPI Controller (rev 21)
Subsystem: Lenovo Sunrise Point LPC Controller/eSPI Controller
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
Subsystem: Lenovo Sunrise Point-LP PMC
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
Subsystem: Lenovo Sunrise Point-LP HD Audio
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel, snd_soc_skl
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
Subsystem: Lenovo Sunrise Point-LP SMBus
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
3f:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
Subsystem: Intel Corporation Dual Band Wireless-AC 8265
Kernel modules: iwlwifi
40:00.0 Non-Volatile memory controller: Intel Corporation SSD 600P Series (rev 03)
Subsystem: Intel Corporation SSD 600P Series
Kernel driver in use: nvme
Kernel modules: nvme
ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
uname -sr
Linux 5.11.0-38-generic
Thank you so much for any help/insights. I'll do my best to be responsive and supply any requested info/etc.
Requested command outputs
inxi -n before crash
Network: Device-1: Intel Wireless 8265 / 8275 driver: iwlwifi
IF: wlp63s0 state: up mac: ac:ed:5c:d9:2a:06
inxi -n after crash
Network: Device-1: Intel Wireless 8265 / 8275 driver: N/A
sudo dmesg | grep iwl before crash
[ 5.140125] iwlwifi 0000:3f:00.0: Found debug destination: EXTERNAL_DRAM
[ 5.140130] iwlwifi 0000:3f:00.0: Found debug configuration: 0
[ 5.140744] iwlwifi 0000:3f:00.0: loaded firmware version 36.77d01142.0 8265-36.ucode op_mode iwlmvm
[ 5.184742] iwlwifi 0000:3f:00.0: Detected Intel(R) Dual Band Wireless AC 8265, REV=0x230
[ 5.193588] iwlwifi 0000:3f:00.0: Applying debug destination EXTERNAL_DRAM
[ 5.194155] iwlwifi 0000:3f:00.0: Allocated 0x00400000 bytes for firmware monitor.
[ 5.250297] iwlwifi 0000:3f:00.0: base HW address: ac:ed:5c:d9:2a:06
[ 5.325343] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[ 5.340260] iwlwifi 0000:3f:00.0 wlp63s0: renamed from wlan0
[ 5.861219] iwlwifi 0000:3f:00.0: Applying debug destination EXTERNAL_DRAM
[ 5.994119] iwlwifi 0000:3f:00.0: Applying debug destination EXTERNAL_DRAM
[ 6.061098] iwlwifi 0000:3f:00.0: FW already configured (0) - re-configuring
sudo dmesg | grep iwl after crash
[ 6.141845] iwlwifi 0000:3f:00.0: FW already configured (0) - re-configuring
[ 162.126250] iwlwifi 0000:3f:00.0: Error sending STATISTICS_CMD: time out after 2000ms.
[ 162.126266] iwlwifi 0000:3f:00.0: Current CMD queue read_ptr 1 write_ptr 2
[ 162.143880] WARNING: CPU: 2 PID: 549 at drivers/net/wireless/intel/iwlwifi/pcie/trans.c:2013 iwl_trans_pcie_grab_nic_access+0x1ab/0x1e0 [iwlwifi]
[ 162.143896] Modules linked in: ccm rfcomm cmac algif_hash algif_skcipher af_alg bnep snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_soc_skl snd_soc_hdac_hda snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_soc_acpi_intel_match snd_soc_acpi snd_hda_intel snd_intel_dspcfg soundwire_intel soundwire_generic_allocation soundwire_cadence snd_hda_codec snd_hda_core snd_hwdep soundwire_bus snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq nls_iso8859_1 mei_hdcp iwlmvm mac80211 libarc4 intel_rapl_msr iwlwifi snd_seq_device snd_timer input_leds uvcvideo x86_pkg_temp_thermal hid_sensor_als intel_powerclamp videobuf2_vmalloc videobuf2_memops coretemp hid_sensor_accel_3d hid_sensor_trigger videobuf2_v4l2 rapl industrialio_triggered_buffer kfifo_buf intel_cstate snd wmi_bmof serio_raw videobuf2_common intel_wmi_thunderbolt hid_sensor_iio_common efi_pstore btusb btrtl cfg80211 industrialio btbcm
[ 162.143987] RIP: 0010:iwl_trans_pcie_grab_nic_access+0x1ab/0x1e0 [iwlwifi]
[ 162.144014] iwl_write_prph_delay+0x41/0xb0 [iwlwifi]
[ 162.144023] iwl_force_nmi+0x59/0x60 [iwlwifi]
[ 162.144030] iwl_trans_pcie_sync_nmi+0x1f8/0x270 [iwlwifi]
[ 162.144040] iwl_pcie_send_hcmd_sync+0x2f0/0x390 [iwlwifi]
[ 162.144051] iwl_trans_pcie_send_hcmd+0x34/0xf0 [iwlwifi]
[ 162.144060] iwl_trans_send_cmd+0x55/0xc0 [iwlwifi]
[ 162.144071] iwl_mvm_send_cmd+0x1f/0x40 [iwlmvm]
[ 162.144081] iwl_mvm_request_statistics+0x72/0xd0 [iwlmvm]
[ 162.144090] iwl_mvm_mac_sta_statistics+0x17d/0x3c0 [iwlmvm]
[ 162.144277] iwlwifi 0000:3f:00.0: iwlwifi transaction failed, dumping registers
[ 162.162022] WARNING: CPU: 2 PID: 549 at drivers/net/wireless/intel/iwlwifi/mvm/../iwl-trans.h:1342 iwl_mvm_dump_lmac_error_log+0x4f7/0x550 [iwlmvm]
[ 162.162118] RIP: 0010:iwl_mvm_dump_lmac_error_log+0x4f7/0x550 [iwlmvm]
[ 162.162142] iwl_mvm_dump_nic_error_log+0x28/0x130 [iwlmvm]
[ 162.162150] iwl_mvm_nic_error+0x35/0x40 [iwlmvm]
[ 162.162158] iwl_trans_pcie_sync_nmi+0xbf/0x270 [iwlwifi]
[ 162.162170] iwl_pcie_send_hcmd_sync+0x2f0/0x390 [iwlwifi]
[ 162.162182] iwl_trans_pcie_send_hcmd+0x34/0xf0 [iwlwifi]
[ 162.162191] iwl_trans_send_cmd+0x55/0xc0 [iwlwifi]
[ 162.162201] iwl_mvm_send_cmd+0x1f/0x40 [iwlmvm]
[ 162.162209] iwl_mvm_request_statistics+0x72/0xd0 [iwlmvm]
[ 162.162217] iwl_mvm_mac_sta_statistics+0x17d/0x3c0 [iwlmvm]
[ 162.162394] iwlwifi 0000:3f:00.0: HW error, resetting before reading
[ 162.220661] iwlwifi 0000:3f:00.0: Collecting data: trigger 2 fired.
[ 164.833034] iwlwifi 0000:3f:00.0: Applying debug destination EXTERNAL_DRAM
[ 164.937153] iwlwifi 0000:3f:00.0: Could not load the [0] uCode section
[ 164.937159] iwlwifi 0000:3f:00.0: Failed to start INIT ucode: -5
[ 164.937161] iwlwifi 0000:3f:00.0: Failed to run INIT ucode: -5
[ 164.937163] iwlwifi 0000:3f:00.0: Failed to start RT ucode: -5
[ 164.937174] iwlwifi 0000:3f:00.0: Collecting data: trigger 16 fired.
[ 164.971939] WARNING: CPU: 2 PID: 39 at drivers/net/wireless/intel/iwlwifi/mvm/../iwl-trans.h:1342 iwl_mvm_dump_lmac_error_log+0x4f7/0x550 [iwlmvm]
[ 164.972072] RIP: 0010:iwl_mvm_dump_lmac_error_log+0x4f7/0x550 [iwlmvm]
[ 164.972099] iwl_mvm_dump_nic_error_log+0x28/0x130 [iwlmvm]
[ 164.972108] iwl_mvm_nic_error+0x35/0x40 [iwlmvm]
[ 164.972116] iwl_trans_pcie_sync_nmi+0xbf/0x270 [iwlwifi]
[ 164.972128] ? iwl_fw_dbg_collect_desc+0xde/0x190 [iwlwifi]
[ 164.972140] iwl_fw_dbg_error_collect+0x59/0xc0 [iwlwifi]
[ 164.972151] iwl_mvm_up+0xf0/0xca0 [iwlmvm]
[ 164.972185] __iwl_mvm_mac_start+0x2b/0x180 [iwlmvm]
[ 164.972193] iwl_mvm_mac_start+0x2a/0x40 [iwlmvm]
[ 165.030282] iwlwifi 0000:3f:00.0: Firmware error during reconfiguration - reprobe!
[ 167.142128] iwlwifi 0000:3f:00.0: enabling device (0000 -> 0002)
[ 167.142251] iwlwifi 0000:3f:00.0: HW_REV=0xFFFFFFFF, PCI issues?
[ 167.142318] iwlwifi: probe of 0000:3f:00.0 failed with error -5
sudo journalctl -b 0 -u NetworkManager after crash
Oct 24 14:24:39 sanguine NetworkManager[542]: <info> [1635099879.8878] ifupdown: management mode: unmanaged
Oct 24 14:24:39 sanguine NetworkManager[542]: <warn> [1635099879.8880] ifupdown: interfaces file /etc/network/interfaces doesn't exist
Oct 24 14:24:39 sanguine NetworkManager[542]: <info> [1635099879.8920] device (wlp63s0): driver supports Access Point (AP) mode
Oct 24 14:24:39 sanguine NetworkManager[542]: <info> [1635099879.8927] manager: (wlp63s0): new 802.11 Wi-Fi device (/org/freedesktop/NetworkManager/Devices/2)
Oct 24 14:24:39 sanguine NetworkManager[542]: <info> [1635099879.8964] device (wlp63s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Oct 24 14:24:40 sanguine NetworkManager[542]: <warn> [1635099880.1283] Error: failed to open /run/network/ifstate
Oct 24 14:24:40 sanguine NetworkManager[542]: <info> [1635099880.2347] Wi-Fi P2P device controlled by interface wlp63s0 created
Oct 24 14:24:40 sanguine NetworkManager[542]: <info> [1635099880.2353] manager: (p2p-dev-wlp63s0): new 802.11 Wi-Fi P2P device (/org/freedesktop/NetworkManager/Devices/3)
Oct 24 14:24:40 sanguine NetworkManager[542]: <info> [1635099880.2362] device (p2p-dev-wlp63s0): state change: unmanaged -> unavailable (reason 'managed', sys-iface-state: 'external')
Oct 24 14:24:40 sanguine NetworkManager[542]: <info> [1635099880.2381] device (p2p-dev-wlp63s0): state change: unavailable -> disconnected (reason 'none', sys-iface-state: 'managed')
Oct 24 14:24:40 sanguine NetworkManager[542]: <info> [1635099880.2389] device (wlp63s0): state change: unavailable -> disconnected (reason 'supplicant-available', sys-iface-state: 'managed')
Oct 24 14:24:40 sanguine NetworkManager[542]: <warn> [1635099880.2437] sup-iface: failed to cancel p2p connect: P2P cancel failed
Oct 24 14:24:43 sanguine NetworkManager[542]: <info> [1635099883.6603] policy: auto-activating connection 'Bard-secure' (836a0586-f3f8-4fea-8951-9373634d6567)
Oct 24 14:24:43 sanguine NetworkManager[542]: <info> [1635099883.6608] device (wlp63s0): Activation: starting connection 'Bard-secure' (836a0586-f3f8-4fea-8951-9373634d6567)
Oct 24 14:24:43 sanguine NetworkManager[542]: <info> [1635099883.6610] device (wlp63s0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Oct 24 14:36:14 sanguine NetworkManager[542]: <warn> [1635100574.8515] sup-iface[0x55611c431120,wlp63s0]: connection disconnected (reason -3)
Oct 24 14:36:14 sanguine NetworkManager[542]: <info> [1635100574.8534] device (wlp63s0): state change: activated -> unmanaged (reason 'removed', sys-iface-state: 'removed')
Oct 24 14:36:14 sanguine NetworkManager[542]: <info> [1635100574.8851] dhcp4 (wlp63s0): canceled DHCP transaction
Oct 24 14:36:14 sanguine NetworkManager[542]: <info> [1635100574.8852] dhcp4 (wlp63s0): state changed bound -> done
Oct 24 14:36:14 sanguine NetworkManager[542]: <info> [1635100574.8948] manager: NetworkManager state is now DISCONNECTED
Oct 24 14:36:14 sanguine NetworkManager[542]: <info> [1635100574.9042] device (p2p-dev-wlp63s0): state change: disconnected -> unmanaged (reason 'removed', sys-iface-state: 'removed')
Oct 24 14:36:14 sanguine NetworkManager[542]: <info> [1635100574.9068] radio killswitch /sys/devices/pci0000:00/0000:00:1c.5/0000:3f:00.0/ieee80211/phy0/rfkill3 disappeared
Oct 24 14:36:14 sanguine NetworkManager[542]: <warn> [1635100574.9071] dns-sd-resolved[4cf74bac7d90a488]: send-updates failed to update systemd-resolved: GDBus.Error:org.freedesktop.resolve1.NoSuchLink: Link 2 not known
