Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.16 kernel[0].
If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.16-rc7-utopic/ ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1340729 Title: WiFi network connection unstable after upgrading from 12.04 to 14.04 Status in “linux” package in Ubuntu: Incomplete Bug description: After upgrading from 12.04 to 14.04 on a Dell Vostro 3400 the Wi-Fi network connection became unstable: no automatic connection on start up and no network at all after resuming from an hibernation. Both of them were working previously. More information on further reports. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: ubuntu-release-upgrader-core 1:0.220.2 ProcVersionSignature: Ubuntu 3.13.0-30.55-generic 3.13.11.2 Uname: Linux 3.13.0-30-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 CrashDB: ubuntu CurrentDesktop: GNOME Date: Fri Jul 11 09:42:25 2014 InstallationDate: Installed on 2010-09-25 (1385 days ago) InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100901.1) PackageArchitecture: all SourcePackage: ubuntu-release-upgrader Symptom: dist-upgrade UpgradeStatus: Upgraded to trusty on 2014-07-07 (3 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1340729/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp