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Author Topic: Wifi issue on 9.0 (armv6/armv7)  (Read 3454 times)

Offline ZeroG

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Wifi issue on 9.0 (armv6/armv7)
« on: May 29, 2017, 09:54:19 AM »
I'm new to picore, so I may have made a mistake anywhere, anyway, I can't connect to wifi on my raspberry pi zero W, I have an issue when loading module. It works as expected under raspbian.

My onboot.lst (for armv6 9.0, almost the same for armv7 9.0 except for the wireless tcz version):
---
openssh.tcz
wireless_tools.tcz
firmware-rpi3-wireless.tcz
wireless-4.9.22-piCore.tcz
wpa_supplicant.tcz
---

When I start wpa_supplicant in my bootlocal.sh with :
wpa_supplicant -B -c/etc/wpa_supplicant/wpa_supplicant.conf -iwlan0

I get :
Successfully initialized wpa_supplicant
nl80211: 'nl80211' generic netlink not found
Failed to initialize driver 'nl80211'

In my syslog, I keep having the following line :
Jan  1 00:00:19 box user.warn kernel: [   19.877097] cfg80211: disagrees about version of symbol module_layout

Any idea ?

Offline Misalf

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #1 on: May 29, 2017, 10:21:54 AM »
Try loading the firmware first. Otherwise rmmod the module and then modprobe it again.
Download a copy and keep it handy: Core book ;)

Offline ZeroG

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #2 on: May 29, 2017, 11:47:43 AM »
I missed something, when I tried to modprobe my module, it's not found even if I do have the modules in the onboot.lst file :
wireless-4.9.22-piCore.tcz (module file in the tcz as /usr/local/lib/modules/4.9.22-piCore/kernel/drivers/net/wireless/broadcom/brcm80211/brcmfmac/brcmfmac.ko)

When I do :
modprobe brcmfmac
I get :
modprobe: module brcmfmac not found in modules.dep

Is there something special to do with modules tcz to register them other than in the onboot.lst ?

It seems to be mounted
$ mount
/mnt/mmcblk0p2/tce/optional/wireless-4.9.22-piCore.tcz on /tmp/tcloop/wireless-4.9.22-piCore type squashfs (ro,relatime)

Offline ZeroG

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #3 on: May 29, 2017, 01:45:38 PM »
To myself

I had an issue resulting from my tests between the armv6l and armv7l versions, fixed now (my kernel.tclocal symlink was pointing to nothing)

now when I modprobe brcmfmac.ko, I get :
modprobe: can't load module cfg80211 (kernel.tclocal/net/wireless/cfg80211.ko): invalid module format

I'll continue my investigations

Offline bmarkus

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #4 on: May 29, 2017, 10:06:32 PM »
@ZeroG

I will check moduels and symlink, thanks for reporting.

Béla
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"Amateur Radio: The First Technology-Based Social Network."

Offline ZeroG

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #5 on: June 01, 2017, 10:11:09 AM »
@bmarkus

- using the armv6 version and wireless-4.9.22-piCore.tcz

kernel.tclocal points to :
 kernel.tclocal -> /usr/local/lib/modules/4.9.22-piCore-v7/kernel

(is it normal to have v7 in it ?)

I cannot modprobe my module
modprobe: module brcmfmac not found in modules.dep

- using the armv7 version and wireless-4.9.22-piCore-v7.tcz
kernel.tclocal points to :
 kernel.tclocal -> /usr/local/lib/modules/4.9.22-piCore-v7/kernel

And I can modprobe my module, but i have an issue with its dependency
modprobe: can't load module cfg80211 (kernel.tclocal/net/wireless/cfg80211.ko): invalid module format


Offline bmarkus

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #6 on: June 01, 2017, 10:25:01 AM »
It is a bug in the 9.0 armv6. I will fix it in 9.0.1 in few days.
Béla
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"Amateur Radio: The First Technology-Based Social Network."

Offline ZeroG

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #7 on: June 03, 2017, 01:35:50 AM »
@bmarkus

Regarding the armv7 version piCore 9.0 image, the kernel is not built for armv7, it's armv6

Trying on any of the base modules, I get :
modinfo /lib/modules/4.9.22-piCore/kernel/drivers/i2c/busses/i2c-bcm2835.ko -F vermagic
4.9.22-piCore mod_unload modversions ARMv6 p2v8

whereas the wireless-4.9.22-piCore-v7.tcz is indeed built for armv7
modinfo ./squashfs-root-v7/usr/local/lib/modules/4.9.22-piCore-v7/kernel/net/wireless/cfg80211.ko -F vermagic
4.9.22-piCore-v7 SMP mod_unload modversions ARMv7 p2v8

That's why I always have in syslog the fillowing when trying to load any module from wireless-4.9.22-piCore-v7.tcz
 cfg80211: disagrees about version of symbol module_layout

Will wait for 9.0.1 to be rebuilt :)

Offline ZeroG

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #8 on: June 03, 2017, 01:44:23 AM »
Well both released files are the same, that explains the armv6 only kernel in my previous post :

md5sum piCore*.zip
69bfb57427025da8caad4fc859a40464  piCore-9.0.zip
69bfb57427025da8caad4fc859a40464  piCore-9.0-v7.zip

files downloaded from http://tinycorelinux.net/9.x/armv6/releases/RPi/piCore-9.0.zip and http://tinycorelinux.net/9.x/armv7/releases/RPi/piCore-9.0.zip
« Last Edit: June 03, 2017, 01:52:22 AM by ZeroG »

Offline ctor

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Re: Wifi issue on 9.0 (armv6/armv7)
« Reply #9 on: June 04, 2017, 01:30:43 PM »
I think I have the same issue with piCore 9.0, a Tenda usb wireless adapter and a Pi 1 B computer. The issue is that the modprobe command could not find the necessary driver, rt2800usb,  in /lib/modules/4.9.22-piCore/modules.dep. Note: wireless worked flawlessly under piCore 8.0.

I found that the symbolic link kernel.tclocal in /lib/modules/4.9.22-piCore was pointing to /usr/local/lib/modules/4.9.22-piCore-v7/kernel. The link should point to usr/local/lib/modules/4.9.22-piCore/kernel instead for a Pi 1 B computer. After changing the link, running depmod to regenerate modules.dep, I could run modprobe. It now loads the required firmware and linux drivers and wireless now works in piCore 9.0 on my Pi 1 B.

Question: How does the software determine which hardware it is running on for that symbolic link?


« Last Edit: June 04, 2017, 01:34:58 PM by ctor »