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After working with Arch for years and using for Internet connection
a wireless usb adaptor (BELKIN F7D2101) with netctl (static) profile,
I lost network and Internet connection after the 4.0 kernel upgrade.
The error message from booting 4.0 kernel (linux):
"WPA association/authentication failed for interface 'wlan0'
Failed to bring the network up for profile 'wlan0-conn-x193C79'
Failed to start A simple WPA encrypted wireless connection using a static IP"
The adaptor blinks while booting and stops blinking at the end of booting,
and wlan0 interface is down, although it is loading module r8712u and
rtlwifi/rtl871u.bin. Manually removing and loading module and seting up
wlan0 interface has no result for netctl (static) profile to work.
The new 4.0 kernel Arch installation cd can't set up working network
interface although it's loading the same module and firmware.
I managed to get network and internet connection with the old installation cd
and with chroot I downloaded the two other official kernels but in vain.
Especially the linux-lts kernel, which is 3.x.x series kernel never loads driver
and firmware not even manually with modprobe (fatal error) and gives error message:
"Timed out waiting for device sys-subsystem-net-devices-wlan0.device
Dependency failed for A simple WPA encrypted wireless connection using a static IP".
Finally I managed to download compile and install linux-mainline from AUR (many thanks
guys), and booting this kernel I had network and Internet connection working again.
As you see I have found a solution for my problem, but I would like to solve the problem
with more staight solutions like working linux (official) kernel and it may be help for
other users, or is it a kernel bug?
I should appreciate any help.
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I must say I'm experiencing the exact same problem with a D-Link DWA-131 which uses the same chipset and staging driver r8712u.
It worked wonders before my recent reinstall though (which probably had an outdated kernel).
I've tried nearly everything, from switching network managers to the unfinished kernel driver that's on github and it never occured to me that the kernel distribution was tainted.
I'm installing linux-mainline at this very moment and if it works you'll have made my day.
Here's hoping that we can get that particular problem reported and fixed.
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linux-mainline worked for a while then stopped.
So I was forced to change (buy) the wireless addapter.
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