Op woensdag 25 februari 2015 23:33:31 schreef Andreas Färber:

Hi,

Am 25.02.2015 um 22:11 schrieb Freek de Kruijf:

...

I have a strange problem with Wi-Fi connections to two somewhat different Access Points. Both use the same configuration in "YaST network", apart from SSID and IP address. Still the connection does succeed with one AP, but to the other AP it always fails.

In my experience the most frequent cause of inexplicable AP connection problems is a misconfigured RTC. If you're using Ethernet too, make sure NTP is configured.

What do you mean by RTC? And NTP means Network Tine Protocol? What I am really looking for are means to get more debug output than "ifup wlan0 -o debug" delivers. So I can see what goes wrong. -- fr.gr. member openSUSE Freek de Kruijf -- To unsubscribe, e-mail: opensuse-arm+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-arm+owner@opensuse.org

Op donderdag 26 februari 2015 10:44:17 schreef Andreas Färber:

Am 26.02.2015 um 10:12 schrieb Freek de Kruijf:

...

Op woensdag 25 februari 2015 23:33:31 schreef Andreas Färber:

...

Am 25.02.2015 um 22:11 schrieb Freek de Kruijf:

...

I have a strange problem with Wi-Fi connections to two somewhat different Access Points. Both use the same configuration in "YaST network", apart from SSID and IP address. Still the connection does succeed with one AP, but to the other AP it always fails.

In my experience the most frequent cause of inexplicable AP connection problems is a misconfigured RTC. If you're using Ethernet too, make sure NTP is configured.

What do you mean by RTC?

Real time clock, i.e. `date`.

...

And NTP means Network Tine Protocol?

Yes. Can be configured through the yast time(zone) settings.

Andreas

I have a test set up with the RPi connected via the UTP port and two different Wi-Fi USB dongles in the two USB ports of the RPi. The clock is synchronized using NTP via the wired connection. So there is nothing wrong with the RTC and NTP. The two Wi-Fi interfaces are configured the same way apart from the SSID and IP address. I exchanged the SSIDs of these interfaces and both connect to one AP and not to the other AP. -- fr.gr. Freek de Kruijf -- To unsubscribe, e-mail: opensuse-arm+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-arm+owner@opensuse.org

Am 26.02.2015 um 17:37 schrieb Larry Finger:

On 02/26/2015 05:47 AM, Freek de Kruijf wrote:

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Op donderdag 26 februari 2015 10:44:17 schreef Andreas Färber:

...

Am 26.02.2015 um 10:12 schrieb Freek de Kruijf:

...

Op woensdag 25 februari 2015 23:33:31 schreef Andreas Färber:

...

Am 25.02.2015 um 22:11 schrieb Freek de Kruijf:

...

I have a strange problem with Wi-Fi connections to two somewhat different Access Points. Both use the same configuration in "YaST network", apart from SSID and IP address. Still the connection does succeed with one AP, but to the other AP it always fails.

In my experience the most frequent cause of inexplicable AP connection problems is a misconfigured RTC. If you're using Ethernet too, make sure NTP is configured.

What do you mean by RTC?

Real time clock, i.e. `date`.

...

And NTP means Network Tine Protocol?

Yes. Can be configured through the yast time(zone) settings.

Andreas

I have a test set up with the RPi connected via the UTP port and two different Wi-Fi USB dongles in the two USB ports of the RPi. The clock is synchronized using NTP via the wired connection. So there is nothing wrong with the RTC and NTP. The two Wi-Fi interfaces are configured the same way apart from the SSID and IP address. I exchanged the SSIDs of these interfaces and both connect to one AP and not to the other AP.

I see a number of red herrings in this thread. The first is that time has anything to do with it.

I can assure you that connecting to the SUSE Wifi (WPA2 Enterprise?) does not work when the clock is significantly off. I've seen that on both my AC100's internal Wifi and on my Chromebook with a Wifi dongle. Both use NetworkManager. At home with WPA2 Personal (?) it works without problems, independent of the clock.

I also doubt that this has anything to do with RPi or ARM.

Yep. However, ARM boards differ from a PC in often not having a battery-backed RTC and thus causing certain known issues, so that it's not entirely wrong to ask on the -arm list. When sufficient info is known about the non-working setup, a Bugzilla entry might be better though. Regards, Andreas -- SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany GF: Felix Imendörffer, Jane Smithard, Jennifer Guild, Dilip Upmanyu, Graham Norton; HRB 21284 (AG Nürnberg) -- To unsubscribe, e-mail: opensuse-arm+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-arm+owner@opensuse.org