I would recommend against following the instructions in #29. For me it causes a kernel panic I had to fix by blacklisting the rtl8723be driver in recovery mode, and the makefile also seemed to delete the existing driver already in the kernel, so I ended up reinstalling the OS to fix it.
As for how I got my wifi working: Installed 14.04 from the live disk. Did a full update and upgrade of packages while connected via ethernet. This should give you the 3.13.0-29-generic #53-Ubuntu kernel. When you reboot into this kernel, you will see the error in #19 in your dmesg about missing firmware. As mentioned in #20, you will need to download the rtl8723befw.bin firmware and then copy it to /lib/firmware/rtlwifi/ Reboot and wifi will work. So two questions- Will this firmware be included in a future kernel update for Trusty? Will there be an updated iso for Trusty at some point with a newer kernel, so that this wifi card will work out of the box? -- 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/1320070 Title: Realtek Wifi card RTL8723BE drops connection with MSI enabled Status in “linux” package in Ubuntu: Fix Released Status in “linux” source package in Trusty: Fix Released Status in “linux” source package in Utopic: Fix Released Bug description: As my testing result with ThinkPad E540 and other users' report[1], RTL8723BE drops connection with MSI enabled, need to backport 329d6e299f92a591acb3a80f6d597a5f9dce7e6d "rtlwifi: rtl8723be: disable MSI interrupts mode" [1] https://bugs.launchpad.net/bugs/1240940 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1320070/+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