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Wifi randomly disappeared permanantly

Linux Kernel, Network, and Services configuration.
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abdullahkhalids
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Wifi randomly disappeared permanantly

#1 Post by abdullahkhalids »

This morning I had the wifi working, as it has been for the past year on this system. Later in the day, when I opened up my laptop, wifi was missing and I can't get it back.

I have a Thinkpad T470 with Intel Dual Band Wireless AC(2x2) 8265.
On Debian testing, and firmware-linux-nonfree and firmware-iwlwifi are installed.

lspci output does not show the network adapter

Code: Select all

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point LPC Controller/eSPI Controller (rev 21)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (4) I219-LM (rev 21)
dmesg | grep firmware has no information

Code: Select all

[    0.090205] Spectre V2 : Enabling Restricted Speculation for firmware calls
[    1.796829] i915 0000:00:02.0: firmware: direct-loading firmware i915/kbl_dmc_ver1_04.bin
[    1.797370] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[    3.397419] psmouse serio2: trackpoint: IBM TrackPoint firmware: 0x0e, buttons: 3/3
[    5.838938] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[    5.843389] bluetooth hci0: firmware: direct-loading firmware intel/ibt-12-16.sfi
[    5.843404] Bluetooth: hci0: Found device firmware: intel/ibt-12-16.sfi
[    7.362571] Bluetooth: hci0: Waiting for firmware download to complete
[    7.380672] bluetooth hci0: firmware: direct-loading firmware intel/ibt-12-16.ddc
[   48.867835] usb 1-4: device firmware changed
Obviously lsmod etc has no wireless modules loaded. On the other hand, bluetooth is fully functional and working.

I booted up a live usb with non-free firmware, and that too did not show me the wireless adapter.

What could be the problem here? Did my hardware randomly die?
Last edited by abdullahkhalids on 2021-09-12 06:24, edited 2 times in total.

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Re: Wifi randomly disappeared permanantly

#2 Post by FreewheelinFrank »

Hardware does fail sometimes.

Not something I have experienced, but I read somewhere that network cards can sometimes fail to wake up from sleep mode. Taking out the laptop battery (when it's shut down, obviously) for a few minutes can apparently reset the card if this happens. Worth a try? Some modern laptops don't have a clack battery, and rely on the main battery to power the clock, so you may have to reset system time.

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Re: Wifi randomly disappeared permanantly

#3 Post by reinob »

Could you run "rfkill" from a terminal and post the output here?
It could be that you (or something) has disabled the wlan interface.

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Re: Wifi randomly disappeared permanantly

#4 Post by abdullahkhalids »

rfkill output

Code: Select all

ID TYPE      DEVICE                   SOFT      HARD
 0 bluetooth tpacpi_bluetooth_sw unblocked unblocked
 4 bluetooth hci0                unblocked unblocked
So, it's not even being detected.

I did some more digging. On 9 sep, I restarted my computer, and according to kern.log (and my experience) wifi loaded fine:

Code: Select all

Sep  9 13:26:50 jupiter kernel: [    5.791176] Intel(R) Wireless WiFi driver for Linux
Sep  9 13:26:50 jupiter kernel: [    5.791529] iwlwifi 0000:04:00.0: enabling device (0000 -> 0002)
Sep  9 13:26:50 jupiter kernel: [    5.801795] resource sanity check: requesting [mem 0xfed10000-0xfed15fff], which spans more than pnp 00:07 [mem 0xfed10000-0xfed13fff]
Sep  9 13:26:50 jupiter kernel: [    5.801804] caller snb_uncore_imc_init_box+0x78/0xc0 [intel_uncore] mapping multiple BARs
Sep  9 13:26:50 jupiter kernel: [    5.815752] iwlwifi 0000:04:00.0: firmware: direct-loading firmware iwlwifi-8265-36.ucode
Sep  9 13:26:50 jupiter kernel: [    5.816246] iwlwifi 0000:04:00.0: loaded firmware version 36.ad812ee0.0 8265-36.ucode op_mode iwlmvm
Sep  9 13:26:50 jupiter kernel: [    5.816877] iwlwifi 0000:04:00.0: firmware: failed to load iwl-debug-yoyo.bin (-2)
The last is a harmless error message apparently.

I suspended the computer a couple of times till the next day (10 sep), when I resumed, and kern.log had the following errors

Code: Select all

Sep 10 14:45:28 jupiter kernel: [63338.685786] pcieport 0000:00:1c.0: can't change power state from unknown to D0 (config space inaccessible)
Sep 10 14:45:28 jupiter kernel: [63338.686918] pcieport 0000:00:1c.6: can't change power state from D3hot to D0 (config space inaccessible)
Sep 10 14:45:28 jupiter kernel: [63338.703520] iwlwifi 0000:04:00.0: can't change power state from D3hot to D0 (config space inaccessible)
----------------
Sep 10 14:45:28 jupiter kernel: [63338.814434] iwlwifi 0000:04:00.0: iwlwifi transaction failed, dumping registers
Sep 10 14:45:28 jupiter kernel: [63338.814441] iwlwifi 0000:04:00.0: iwlwifi device config registers:
Sep 10 14:45:28 jupiter kernel: [63338.814808] iwlwifi 0000:04:00.0: 00000000: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814817] iwlwifi 0000:04:00.0: 00000020: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814826] iwlwifi 0000:04:00.0: 00000040: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814834] iwlwifi 0000:04:00.0: 00000060: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814842] iwlwifi 0000:04:00.0: 00000080: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814850] iwlwifi 0000:04:00.0: 000000a0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814858] iwlwifi 0000:04:00.0: 000000c0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814866] iwlwifi 0000:04:00.0: 000000e0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814874] iwlwifi 0000:04:00.0: 00000100: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814883] iwlwifi 0000:04:00.0: 00000120: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814891] iwlwifi 0000:04:00.0: 00000140: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814896] iwlwifi 0000:04:00.0: iwlwifi device memory mapped registers:
Sep 10 14:45:28 jupiter kernel: [63338.814968] iwlwifi 0000:04:00.0: 00000000: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.814976] iwlwifi 0000:04:00.0: 00000020: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.816693] iwlwifi 0000:04:00.0: iwlwifi parent port (0000:00:1c.6) config registers:
Sep 10 14:45:28 jupiter kernel: [63338.817206] iwlwifi 0000:00:1c.6: 00000000: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817214] iwlwifi 0000:00:1c.6: 00000020: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817223] iwlwifi 0000:00:1c.6: 00000040: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817230] iwlwifi 0000:00:1c.6: 00000060: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817238] iwlwifi 0000:00:1c.6: 00000080: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817246] iwlwifi 0000:00:1c.6: 000000a0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817254] iwlwifi 0000:00:1c.6: 000000c0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817262] iwlwifi 0000:00:1c.6: 000000e0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817270] iwlwifi 0000:00:1c.6: 00000100: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817279] iwlwifi 0000:00:1c.6: 00000120: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817287] iwlwifi 0000:00:1c.6: 00000140: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817295] iwlwifi 0000:00:1c.6: 00000160: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817303] iwlwifi 0000:00:1c.6: 00000180: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817311] iwlwifi 0000:00:1c.6: 000001a0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817319] iwlwifi 0000:00:1c.6: 000001c0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817341] iwlwifi 0000:00:1c.6: 000001e0: ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63338.817346] iwlwifi 0000:00:1c.6: 00000200: ffffffff ffffffff ffffffff
Sep 10 14:45:28 jupiter kernel: [63339.001966] usb 2-3: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
Sep 10 14:45:28 jupiter kernel: [63339.088096] ata3: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
Sep 10 14:45:28 jupiter kernel: [63339.102110] ata3.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
Sep 10 14:45:28 jupiter kernel: [63339.102112] ata3.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
Sep 10 14:45:28 jupiter kernel: [63339.102305] ata3.00: supports DRM functions and may not be fully accessible
Sep 10 14:45:28 jupiter kernel: [63339.103046] ata3.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded
Sep 10 14:45:28 jupiter kernel: [63339.103047] ata3.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out
Sep 10 14:45:28 jupiter kernel: [63339.103135] ata3.00: supports DRM functions and may not be fully accessible
Sep 10 14:45:28 jupiter kernel: [63339.103486] ata3.00: configured for UDMA/133
Sep 10 14:45:28 jupiter kernel: [63339.153651] usb 1-7: reset full-speed USB device number 2 using xhci_hcd
Sep 10 14:45:28 jupiter kernel: [63339.429593] usb 1-8: reset high-speed USB device number 3 using xhci_hcd
Sep 10 14:45:28 jupiter kernel: [63339.904678] iwlwifi 0000:04:00.0: Could not load the [0] uCode section
Sep 10 14:45:28 jupiter kernel: [63339.904684] iwlwifi 0000:04:00.0: Failed to start INIT ucode: -5
Sep 10 14:45:28 jupiter kernel: [63339.904685] iwlwifi 0000:04:00.0: Failed to run INIT ucode: -5
Sep 10 14:45:28 jupiter kernel: [63339.904686] iwlwifi 0000:04:00.0: Failed to start RT ucode: -5
Sep 10 14:45:28 jupiter kernel: [63339.904687] iwlwifi 0000:04:00.0: Collecting data: trigger 16 fired.
Sep 10 14:45:28 jupiter kernel: [63339.961017] ------------[ cut here ]------------
Sep 10 14:45:28 jupiter kernel: [63339.961023] WARNING: CPU: 3 PID: 32706 at drivers/net/wireless/intel/iwlwifi/mvm/../iwl-trans.h:1391 iwl_mvm_dump_lmac_error_log+0x4eb/0x540 [iwlmvm]
Sep 10 14:45:28 jupiter kernel: [63339.961023] Modules linked in: wacom hid_generic usbhid hid uinput acpi_call(OE) ctr ccm rfcomm cmac algif_hash algif_skcipher af_alg snd_seq_dummy snd_hrtimer snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device bnep btusb btrtl btbcm btintel bluetooth uvcvideo videobuf2_vmalloc jitterentropy_rng videobuf2_memops videobuf2_v4l2 drbg videobuf2_common videodev mc ansi_cprng ecdh_generic ecc nls_ascii nls_cp437 snd_hda_codec_hdmi vfat intel_rapl_msr snd_soc_skl intel_rapl_common fat snd_soc_hdac_hda intel_pmc_core_pltdrv snd_hda_codec_realtek intel_pmc_core snd_hda_ext_core snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_codec_generic snd_soc_acpi_intel_match snd_soc_acpi x86_pkg_temp_thermal snd_hda_intel intel_powerclamp snd_intel_dspcfg coretemp mei_hdcp mei_wdt soundwire_intel soundwire_generic_allocation ghash_clmulni_intel snd_soc_core snd_compress aesni_intel iwlmvm soundwire_cadence libaes crypto_simd mac80211 snd_hda_codec cryptd glue_helper libarc4 snd_hda_core rapl
Sep 10 14:45:28 jupiter kernel: [63339.961050]  intel_cstate snd_hwdep soundwire_bus intel_uncore snd_pcm_oss joydev iwlwifi snd_mixer_oss efi_pstore serio_raw pcspkr snd_pcm iTCO_wdt intel_pmc_bxt iTCO_vendor_support wmi_bmof intel_wmi_thunderbolt watchdog snd_timer ee1004 cfg80211 mei_me ucsi_acpi intel_xhci_usb_role_switch sg typec_ucsi roles mei intel_pch_thermal typec thinkpad_acpi nvram ledtrig_audio snd soundcore tpm_crb ac evdev rfkill tpm_tis tpm_tis_core tpm rng_core acpi_pad parport_pc ppdev lp parport fuse configfs efivarfs ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic sd_mod t10_pi crc_t10dif crct10dif_generic uas usb_storage i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul crct10dif_common xhci_pci crc32_pclmul e1000e cec ahci crc32c_intel libahci psmouse xhci_hcd libata drm ptp scsi_mod pps_core i2c_i801 usbcore i2c_smbus usb_common wmi battery video button
--------------
Sep 10 14:45:28 jupiter kernel: [63339.961214] iwlwifi 0000:04:00.0: HW error, resetting before reading
Sep 10 14:45:28 jupiter kernel: [63339.996772] iwlwifi 0000:04:00.0: Start IWL Error Log Dump:
Sep 10 14:45:28 jupiter kernel: [63339.996774] iwlwifi 0000:04:00.0: Status: 0x00000000, count: 3072
Sep 10 14:45:28 jupiter kernel: [63339.996775] iwlwifi 0000:04:00.0: Loaded firmware version: 36.ad812ee0.0 8265-36.ucode
-------------
Sep 10 14:45:30 jupiter kernel: [63344.915798] iwlwifi 0000:04:00.0: Could not load the [0] uCode section
Sep 10 14:45:30 jupiter kernel: [63344.915814] iwlwifi 0000:04:00.0: Failed to start INIT ucode: -5
Sep 10 14:45:30 jupiter kernel: [63344.915815] iwlwifi 0000:04:00.0: Failed to run INIT ucode: -5
Sep 10 14:45:30 jupiter kernel: [63344.915816] iwlwifi 0000:04:00.0: Failed to start RT ucode: -5
Sep 10 14:45:30 jupiter kernel: [63344.915819] iwlwifi 0000:04:00.0: Collecting data: trigger 16 fired.
------------
Sep 10 14:45:34 jupiter kernel: [63348.625521] iwlwifi 0000:04:00.0: can't change power state from D3cold to D0 (config space inaccessible)
Sep 10 14:45:34 jupiter kernel: [63348.625564] iwlwifi 0000:04:00.0: can't change power state from D3hot to D0 (config space inaccessible)
Sep 10 14:45:34 jupiter kernel: [63348.625856] iwlwifi 0000:04:00.0: HW_REV=0xFFFFFFFF, PCI issues?
Sep 10 14:45:34 jupiter kernel: [63348.635076] iwlwifi: probe of 0000:04:00.0 failed with error -5
After that I restarted and iwlwifi doesn't appear in kern.log again.

Here is the full kern.log https://pastebin.com/CSt72s2b
Last edited by abdullahkhalids on 2021-09-12 06:24, edited 1 time in total.

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Re: Wifi randomly disappeared permanantly

#5 Post by cds60601 »

I'm curious - can you take the time and boot a lived ISO that you knew the wifi worked? That would be a way to help determine if hardware failed or not.
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Re: Wifi randomly disappeared permanantly

#6 Post by FreewheelinFrank »

Wait! You're on Testing? Is that right? You're probably getting a heap of updates right now as Testing is unfrozen. That would explain why wifi has been working for the last year and suddenly stopped working: a firmware, microcode or kernel update has introduced a new bug. You could try downgrading relevant packages until the problem is fixed.

Oh, and also please put output in code tags - it makes the thread more readable.

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Re: Wifi randomly disappeared permanantly

#7 Post by abdullahkhalids »

I just booted up from a debian-live-10.10.0-amd64-xfce+nonfree, where everything should work. However, it did not detect the wifi card either. No mention of anything related to the wifi card in kern.log of reported by lshw etc.

I am gonna try the battery reset thing suggested by FreewheelinFrank. Otherwise, I guess, this is a hardware failure. At least I am on a thinkpad and can replace the chip easily.

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Re: Wifi randomly disappeared permanantly

#8 Post by cds60601 »

abdullahkhalids wrote: 2021-09-12 07:21 I just booted up from a debian-live-10.10.0-amd64-xfce+nonfree, where everything should work. However, it did not detect the wifi card either. No mention of anything related to the wifi card in kern.log of reported by lshw etc.

I am gonna try the battery reset thing suggested by FreewheelinFrank. Otherwise, I guess, this is a hardware failure. At least I am on a thinkpad and can replace the chip easily.
By chance, does that Lenovo happen to have a WiFi switch on the side of it? It may have what looks like little monitors on each side of the switch or maybe try the Fn key + F8
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Re: Wifi randomly disappeared permanantly

#9 Post by abdullahkhalids »

By chance, does that Lenovo happen to have a WiFi switch on the side of it? It may have what looks like little monitors on each side of the switch
I wish it did. It does not.

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Re: Wifi randomly disappeared permanantly

#10 Post by cds60601 »

abdullahkhalids wrote: 2021-09-12 08:28
By chance, does that Lenovo happen to have a WiFi switch on the side of it? It may have what looks like little monitors on each side of the switch
I wish it did. It does not.
maybe try the Fn key + F8
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Re: Wifi randomly disappeared permanantly

#11 Post by abdullahkhalids »

maybe try the Fn key + F8
That has never worked on any of my thinkpads on linux. But I did try it now to no avail.

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Re: Wifi randomly disappeared permanantly

#12 Post by FreewheelinFrank »

I managed to disable wifi on my laptop the other day by wiping same dust off the keyboard and accidentally hitting F12 (on a Toshiba), but I assumed the network adapter would still be visible with lspci even if turned off - I checked and it is on my laptop.

At least Testing is off the hook if Debian live doesn't see it.

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Re: Wifi randomly disappeared permanantly

#13 Post by abdullahkhalids »

Thanks everyone for the answers and the help. I finally disconnected main power, open up the laptop, removed both batteries, removed the wifi card, and then put it back in.

That did the trick. My wifi is working again!

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Re: Wifi randomly disappeared permanantly

#14 Post by bester69 »

Wifi's are trashing linux.. mine neither works properly in new HP computer ; also dissapears from time to time..I need to reload module in suspend-wakeup script to workaround that, such like this.: :? ... I also got simmilar troubles when started using wheezy

Code: Select all

#!/bin/sh
case $1 in
    post)
su root -c "modprobe  8821ce"
        ;;       
     pre)    
su root -c "modprobe -r 8821ce"
     ;;
esac
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Re: Wifi randomly disappeared permanantly

#15 Post by Fig »

I've been having issues with wifi stopping after twenty minutes. I reset my modem to no effect and tried a new firewall but still it just fades out within half an hour. My wifi is a harvested usb type dongle from an old laptop now using in a pc.

Anyway today I upgraded to Debian 11 and so far so good.
https://www.makeuseof.com/upgrade-debia ... eye-linux/

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Re: Wifi randomly disappeared permanantly

#16 Post by bester69 »

I have same trouble with RTL8821CE (wifi driver its not available in debian yet)
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