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BottleNeck

Member

Registered: 2019-03-12

Posts: 35

[solved] wifi "mysteriously" stopped working (iwlwifi)

Hi all,

After not really doing anything special, i find my wifi to have stopped working. I believe it is a driver issue as the dmesg indicates:

[    8.304324] iwlwifi 0000:00:14.3: Failed to load firmware chunk!
[    8.304332] iwlwifi 0000:00:14.3: iwlwifi transaction failed, dumping registers

I have unfortunately no idea how to debug this. I do notice that after driver crash naturally the device is not created if i look for the command "ip link"

Additionally, "rfkill list all" does no longer show the adapter. However with "lspci -k" it still shows up as:

00:14.3 Network controller: Intel Corporation Wireless-AC 9560 [Jefferson Peak] (rev 10)
	Subsystem: Intel Corporation Wireless-AC 9560 [Jefferson Peak]
	Kernel driver in use: iwlwifi
	Kernel modules: iwlwifi

I have included my recent update history (https://paste.ubuntu.com/p/ySBVJTtSpq/) and full dmesg log (http://dpaste.com//16HV2WJ)

It's pretty hard for me to say when this problem occurred. I noticed it today after not really doing anything special or doing anything special. Perhaps a reboot somewhere that i was not fully aware off. In order to attempt a fix, a fallback to old kernel did not seem to work. Additionally i have downloaded a new driver but that also does either lot load or is equally corrupted.

The laptop i am running on is a Y540-15IRH-PG0 (lenovo)

Can one of you masters help me along a bit? I probably am missing a heap of info but i have no idea how to troubleshoot further (hence no clue what info might be useful)

Last edited by BottleNeck (2020-02-23 14:47:06)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 76,056

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

iommu issue?
https://bbs.archlinux.org/viewtopic.php?id=243691

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BottleNeck

Member

Registered: 2019-03-12

Posts: 35

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

I fear not:

#cat /proc/cmdline 
BOOT_IMAGE=/boot/vmlinuz-linux-lts root=UUID=0dca9317-1800-416d-bd3c-9288c4960d8f rw loglevel=3 intel_iommu=off

also maybe handy to know kernel:

uname -a
Linux leno 5.4.21-1-lts #1 SMP Thu, 20 Feb 2020 18:23:19 +0000 x86_64 GNU/Linux

loqs

Member

Registered: 2014-03-06

Posts: 18,928

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

Can you reproduce the issue using the kernel from the linux package?

BottleNeck

Member

Registered: 2019-03-12

Posts: 35

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

Can you reproduce the issue using the kernel from the linux package?

I am asuming you mean the non-lts version? Yes i can.

loqs

Member

Registered: 2014-03-06

Posts: 18,928

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

I can see in pacman.log you tried downgrading to linux-firmware 20191220.6871bff and linux-lts 5.4.20-1
Did you check in the journal that wifi was working under linux-lts 5.4.20?  In which case there is no point checking even older kernels.

Last edited by loqs (2020-02-22 20:09:30)

BottleNeck

Member

Registered: 2019-03-12

Posts: 35

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

Unfortunately under the old kernel it was also not working. I do not think it would be useful to check many older ones. For my feeling it "just stopped working"  but it is reasonable to assume i rebooted somewhere. I can however not imagine that i have 2 lts updates sins last reboot, but it would be good to check i guess.... not really enthusiastic to go that far back

So what do you guys recon? Is this kernel or driver related? Would it be useful to just see what happens in a week or so (updates update updated )

<edit>
Screw it, went back to 4.19.something. Also not working. It must be either a hardware issue or something in the driver i guess. However, i also rolled back the linux-firmware package before, so i am rather confused at this point.

Last edited by BottleNeck (2020-02-22 21:17:01)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 76,056

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

rfkill?

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

BottleNeck

Member

Registered: 2019-03-12

Posts: 35

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

where initiall it was not showing with rfkill it is now:

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: yes
	Hard blocked: no

issue seems comparable to: https://bbs.archlinux.org/viewtopic.php?id=252676

<edit>
booted into linux (non lts kernel) removed all iwlwifi* files in /lib/firmware reinstalled the linux-firmware package, rebooted and all works again. I have no idea why this worked.... Perhaps a file corruption somewhere?

Last edited by BottleNeck (2020-02-23 14:46:44)

giacombum

Member

Registered: 2011-08-03

Posts: 94

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

Hello, which version of kernel you're talking about?

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,642

Re: [solved] wifi "mysteriously" stopped working (iwlwifi)

booted into linux (non lts kernel) removed all iwlwifi* files in /lib/firmware reinstalled the linux-firmware package, rebooted and all works again. I have no idea why this worked.... Perhaps a file corruption somewhere?

My guess is that the kernel module for the kernel from which you booted were no longer available.

Last edited by ewaller (2020-02-25 15:03:10)

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