NetworkManager can' t connect on WiFi if laptop is without power connection

[pepeyomat]

When I suspend and resume if laptop work with battery, network manager try to connect to WiFi, and try again but it fails. When i connect power wired, immediately Network Manager can to connect!!! My Wireless network is unprotected and work perfectly with my other computer. I use kubuntu 11.10 but the same happens on ubuntu 11.10. My laptop is a DELL XPS L702X and my Wireless device is:
03:00.0 Network controller: Intel Corporation Centrino Wireless-N 1030 (rev 34)

Sorry for my bad english.
Thankyou in advance,
Matteo P

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sean DS (se4n-1)]

this seems to be related to bugs Bug #957683 and Bug #888672

if you think that's the case then mark as duplicate would you?

[Sean DS (se4n-1)]

On precise daily build I have this issue may be related to bugs Bug #957683 and Bug #888672 .

probably something to do with power saving settings in precise. I havent tried to fix by changing ACPI or power saving settings yet.

will report back.

[Sean DS (se4n-1)]

I've tried to reproduce this with my Vaio laptop. The Inspiron that had problems used a Broadcom wifi card, as does another laptop that can reproduce this.

This seems to be simply a problem with the broadcom wifi drivers in this case.

[Launchpad Janitor (janitor)]

[Expired for plasma-widget-networkmanagement (Ubuntu) because there has been no activity for 60 days.]