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[Enrico <enricobe@xxxxxxxxxxx>]

Yes, but I've not tried with 14.10. I've tested it on 15.10 with kernel
3.16.

We can say:
15.04(3.16): Stable bug always slow.
15.04(3.19): Unstable and slow.
15.04(4.0-rc3) stable again, but still slow.

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https://bugs.launchpad.net/bugs/1430509

Title:
  Realtek RTL8723AE can't connect and it's slow

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Vivid:
  Confirmed

Bug description:
  My wireless card "Realtek RTL8723AE PCIe Wireless Network Adapter" doesn't work fine on 15.04. It works pretty fine on 14.10 and previous versions, but it's unstable on 15.04 and the most of times it can't connect to my WiFi network. Sometimes I can solve deleting the network from "Edit connections", but when i can connect the connection is unstable and really slow (40-50 kb/s in download).
  The same wifi card with the same wifi networks worked fine until I've updated to Ubuntu 15.04 so i can suppose that it's a Vivid's bug

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-7-generic 3.19.0-7.7
  ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
  Uname: Linux 3.19.0-7-generic x86_64
  ApportVersion: 2.16.2-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  enrico     1890 F.... pulseaudio
   /dev/snd/controlC1:  enrico     1890 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Tue Mar 10 20:49:22 2015
  InstallationDate: Installed on 2015-02-15 (23 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: TOSHIBA SATELLITE C855-2J5
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-7-generic.efi.signed root=UUID=0a5b817b-470d-4af2-9e2b-e621bd3d341f ro quiet splash vt.handoff=7
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-03-01 (9 days ago)
  dmi.bios.date: 10/01/2013
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: 6.80
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: PLCSF8
  dmi.board.vendor: Intel
  dmi.board.version: Type2 - Board Version
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: OEM Chassis Manufacturer
  dmi.chassis.version: OEM Chassis Version
  dmi.modalias: dmi:bvnInsydeCorp.:bvr6.80:bd10/01/2013:svnTOSHIBA:pnSATELLITEC855-2J5:pvrPSCBYE-04F00RIT:rvnIntel:rnPLCSF8:rvrType2-BoardVersion:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion:
  dmi.product.name: SATELLITE C855-2J5
  dmi.product.version: PSCBYE-04F00RIT
  dmi.sys.vendor: TOSHIBA

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