wifi connection failed after change of hdmi-mode

[mloeher5635]

Hi all,

first of all, I am not an linux expert!.
I installed archlinux on my RPI, got a wifi connection with wifi-menu, installed and ran lxde, everything was fine. But the default resolution was not adequate for my video display. I modified /boot/config.txt to an allowed hdmi-mode for my display (hdmi_mode=23). After reboot the resolution was as defined but, very strange, the wifi-connection with the wifi-menu generated profile (wpa-security) failed.
I got a bunch of error messages, e.g.
ioctl[SIOCSIWAP]: Operation not permitted (which is documented in other posts)
and authentication failure although there was no change of the passphrase in between.
Also, manual start by netctl start wlan0-essid didn't work.

If I reset the changes to the /boot/config.txt and reboot, the connection is established again.

What the hell, /boot/config.txt has to do with the wifi connection? Is there any explanation for that?

regards

Manni

[mloeher5635]

Now I am a little bit further. WLAN could be started manually by netctl start wlan0-essid. I had a mistake in locale.gen' which i corrected.
But during reboot the problem reoccured. May be a timing problem.

Regards
Manni