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[Bug 1320070] Re: Realtek Wifi card RTL8723BE drops connection with MSI enabled

 

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?

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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

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References