kernel-packages team mailing list archive

[Kai Petzke <petzke@xxxxxxxxxxx>]

Just a short note: I have problems, too, with this card on Vivid.
Usually, in less than one hour after going online  the connection just
gets stuck. Sometimes, the connection recovers after a few seconds or
minutes, and data flows again. Sometimes it doesn't until the wireless
is switched off and on, or the machine is rebooted. The behaviour is
very erratic and random. When the connection is stuck, turning the
wireless off via kubuntu's NetworkManager graphical client takes quite
some time (10 seconds or so).

Fortunately, loading the driver with the option fwlps=0 solved the issue for me! Since I wrote the line:
    options rtl8723be fwlps=0
into the file /etc/modprobe.d/rtl8723be.conf , I've had 36 hours of trouble-free wireless experience. As it was hard to survive 36 minutes online before without that line, this is already a great improvement for me!

Apart from the unstable WiFi, I was also fighting with unstable suspend-
to-RAM on my Laptop (Lenovo Yoga 2 with 13 inch screen). Once in a
while, the computer would just crash or hang, when turned to suspend-to-
RAM by closing the display. In that state it still consumes battery, so
the CPU is not turned off correctly then. When re-opened later, the
display stays dark. That problem has also disappeared since I added the
beforementioned option to the rtl8732be driver.

So I assume from my observations, that with fwlps=1 (the default), the driver or the card or both after some time get into an inconsistent state with the following symptoms:
A) No more packets are received and/or transmitted
B) Turning off the wireless LAN and unloading the driver takes a rather long time (a few seconds instead of a fraction of a second)
C) suspend-to-RAM crashes or fails, and leaves the laptop in an unusable state (display off)

-- 
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https://bugs.launchpad.net/bugs/1461174

Title:
  Realtek Wifi card rtl8723be [10ec:b723] WiFi has an issue

Status in HWE Next:
  Triaged
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  My WiFi has an issue.

  ---
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  u          1785 F.... pulseaudio
   /dev/snd/controlC0:  u          1785 F.... pulseaudio
  DistroRelease: Ubuntu 14.04
  HibernationDevice: RESUME=UUID=c2a5715c-c92c-47fa-9aa2-c6f6e03f21bf
  InstallationDate: Installed on 2015-06-09 (0 days ago)
  InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  MachineType: Hewlett-Packard HP 455 G2
  Package: linux (not installed)
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-30-generic root=UUID=97d2645a-a2be-49ec-b1bd-37c43ab4eeb1 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.16.0-30-generic N/A
   linux-backports-modules-3.16.0-30-generic  N/A
   linux-firmware                             1.127.11
  Tags:  trusty
  Uname: Linux 3.16.0-30-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  _MarkForUpload: True
  dmi.bios.date: 07/25/2014
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: M75 Ver. 01.06
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: 2235
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 66.19
  dmi.chassis.asset.tag: 73612P10CU
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvrM75Ver.01.06:bd07/25/2014:svnHewlett-Packard:pnHP455G2:pvrA3009CD10002:rvnHewlett-Packard:rn2235:rvrKBCVersion66.19:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP 455 G2
  dmi.product.version: A3009CD10002
  dmi.sys.vendor: Hewlett-Packard

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