[SOLVED] IWD crashing my system

mezutelni · 2022-02-18 08:33:28

Hello,
I've been using arch happily for 2-3 months, but since last wednesday i'm affected by strange IWD bug.

Sometimes, when i boot my laptop from Hibernation, sleep or normally (from power off), it boot normaly into my Gnome X11 session, and then, after like 2 minutes my network-manager crashes, after this i can't use `sudo` and start basically anything, when i let's say start chrome - It's just loads for eternity.
Also, booting isn't only "initiator" of this bug, sometimes, when i switch my Wi-Fi from 2.4GhZ to 5GhZ one, or when i'm connected with ethernet and then i switch to Wi-Fi - It can happen.
Sadly - it's not happening everytime and i can't recreate it on will, so i'm not sure what is it's trigger.

After this occurs, when i switch to root session, i can't even see status of NetworkManager service, because it's just loads for eternity, just like other programs (i can't even ctrl+c this proccess). Only option is reboot - And it's not great, because even reboot hangs before unmounting disks, and i need to hard power off my laptop with power button so obviously, i'm afraid that my ext4 root and home will break.

When i looked to journalctl -b -1 i found about IWD crash, so i'm betting it's related, here is snippet

 lut 18 08:48:20 szymon-arch systemd-coredump[3240]: [?] Process 449 (iwd) of user 0 dumped core.
                                                    
                                                    Module linux-vdso.so.1 with build-id e70f128dc93a0ce4141b994b2bf8b52a8ba40f28
                                                    Module ld-linux-x86-64.so.2 with build-id c09c6f50f6bcec73c64a0b4be77eadb8f7202410
                                                    Module libc.so.6 with build-id 85766e9d8458b16e9c7ce6e07c712c02b8471dbc
                                                    Module libgcc_s.so.1 with build-id 5d817452a709ca3a213341555ddcf446ecee37fa
                                                    Module libell.so.0 with build-id 964169963666de7b2e9dcda90fedc2d3cac8468e
                                                    Module iwd with build-id 1f1ffb2da98d28599dcadfea13ccfa00849ce2df
                                                    Stack trace of thread 449:
                                                    #0  0x0000562dbf4e91d5 n/a (iwd + 0x391d5)
                                                    #1  0x0000562dbf4e9af8 n/a (iwd + 0x39af8)
                                                    #2  0x00007faf9f03e09b n/a (libell.so.0 + 0x1a09b)
                                                    #3  0x00007faf9f03a741 n/a (libell.so.0 + 0x16741)
                                                    #4  0x00007faf9f03986d l_main_iterate (libell.so.0 + 0x1586d)
                                                    #5  0x00007faf9f03993e l_main_run (libell.so.0 + 0x1593e)
                                                    #6  0x00007faf9f039b84 l_main_run_with_signal (libell.so.0 + 0x15b84)
                                                    #7  0x0000562dbf4c3aba n/a (iwd + 0x13aba)
                                                    #8  0x00007faf9ee2c310 __libc_start_call_main (libc.so.6 + 0x2d310)
                                                    #9  0x00007faf9ee2c3c1 __libc_start_main@@GLIBC_2.34 (libc.so.6 + 0x2d3c1)
                                                    #10 0x0000562dbf4c439e n/a (iwd + 0x1439e)
                                                    ELF object binary architecture: AMD x86-64

My Wi-Fi card is

 02:00.0 Network controller: Intel Corporation Dual Band Wireless-AC 3168NGW [Stone Peak] (rev 10)

Also, i don't belive it's some kind of GNOME issue, because it started happening on KDE and then i Switched to GNOME (not because of this issue of course).
Im running Arch with stock kernel

 linux 5.16.9.arch1-1

other packages are up to date - i'm updating daily, but if you need specific version of something at this moment - of course i'll provide.

Also i have said coredump, but i'm not sure what kind of info is inside and if i can safely upload it here.

Last edited by mezutelni (2022-02-21 08:07:35)

V1del · 2022-02-18 10:13:42

Mentioning NetworkManager and iwd at the same time while omitting that you have configured NetworkManager to use iwd is a guaranteed give away that you run conflicting networking services. NetworkManager uses wpa_supplicant by default for setting up the wireless connection, if you combine that with iwd you get two services fighting for the same interface which can lead to all sorts of desaster, either disable/remove iwd or configure networkmanager to use iwd as it's backend: https://wiki.archlinux.org/title/Networ … Fi_backend

mezutelni · 2022-02-18 11:10:47

V1del wrote:

Mentioning NetworkManager and iwd at the same time while omitting that you have configured NetworkManager to use iwd is a guaranteed give away that you run conflicting networking services. NetworkManager uses wpa_supplicant by default for setting up the wireless connection, if you combine that with iwd you get two services fighting for the same interface which can lead to all sorts of desaster, either disable/remove iwd or configure networkmanager to use iwd as it's backend: https://wiki.archlinux.org/title/Networ … Fi_backend

Yeah, you are right - To be honest, i believe that i installed iwd first because (before installing X server and DE) to be able to connect to wifi from TTY, and after this I installed networkmanager - I'm not sure why i did it this way, but I'm sure, that at the time i installed Arch, I didn't found any info, that iwd will conflict with nm, also it was working for all this time without problem.
That's totally on me, I just removed iwd from my system and hope that this helps, if it does, i'll mark thread as solved.

Thanks.

@edit
Seems, that removing IWD fixed it for me, it also made my system switch Wi-Fi Faster, and now, i'm connecting to 5G automatically (which wasn't the case before). So it's look like there was some indicators before, that something is wrong, but I ignored them.
Thank you, marking as solved, will reopen if needed.

Last edited by mezutelni (2022-02-21 08:07:20)

Arch Linux

#1 2022-02-18 08:33:28

[SOLVED] IWD crashing my system

#2 2022-02-18 10:13:42

Re: [SOLVED] IWD crashing my system

#3 2022-02-18 11:10:47

Re: [SOLVED] IWD crashing my system

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