Wifi keeps disconnecting after resume and won't connect to wifi

[Iain Howard]

Recently upgraded my Dell 1720 Laptop from Ubuntu 12.04 to 14.04

Results: Flaky wifi disconnects after being on standby and will not reconnect.

Eventually after several reboots it connects or suggested command on the internet on how to resolve this.

The card is a BCM4321 wireless card.
I have been through every article and forum post looking for an answer.

I cannot connect to my work's public wifi. Can connect at home but only in certain curcumstances like if the plugs in.

Tried various scripts to kick it into life after resume. Tried re-installing drivers. NOTHING.

Please can someone suggest what this could be and is there an actual answerable fix?

Tried all these:
https://gsuartana.wordpress.com/2014/06/26/how-to-fix-unstable-wifi-connection-after-14-04-upgrade/
http://ubuntuforums.org/showthread.php?t=2220294
http://zeroset.mnim.org/2014/04/22/unstable-wifi-connection-on-ubuntu-14-04-trusty-tahr-ctrl-event-disconnected-reason4-locally_generated1/

To no avail. Any more answers on this greatly appreciated.

Iain

[Iain Howard (iainje)]

Also tried upgrading kernel from 3.13 to 3.16 & 3.18 - These only give me more problems.

Some good and helpful advice on this would be great!

Thanks

Iain

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1460339/+editstatus and add the package name in the text box next to the word Package.

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