kernel-packages team mailing list archive

[TJ <ubuntu@xxxxxx>]

Your IRC conversation indicates the PC also experiences intermittent
issues with the Ps/2 connected Synaptic Touchpad. Hopefully that issue
can be solved with some i8042.XXX kernel parameter.

If not, and combined with this issue, I would suggest a boot-time RAM
test using memtest86+ (available from the GRUB boot manager menu). It is
just possible that memory corruption is the root cause of both issues.

However, when the signal is lost capturing recent entries in the syslog
and kern.log might be helpful here:

sudo tail -n 300 /var/log/syslog /var/log/kern.log | tee /tmp/rtl8188ee-
lost-signal.log

And then attach "/tmp/rtl8188ee-lost-signal.log" to this bug report.

The issue could well be caused by some power-saving feature. The
rtl8188ee kernel module has several PARaMeters that can affect power
state so it might be worth doing some tests with different values. To
see the parameters the module supports use the "modinfo <module-name>"
command. The range of supported PARMs may differ for different versions
of the Linux kernel.

For v4.1.6 I see:

$ modinfo rtl8188ee
filename:       /lib/modules/4.1.0-3-lowlatency/kernel/drivers/net/wireless/rtlwifi/rtl8188ee/rtl8188ee.ko
firmware:       rtlwifi/rtl8188efw.bin
description:    Realtek 8188E 802.11n PCI wireless
license:        GPL
author:         Larry Finger	<Larry.Finger@xxxxxxxxxxxx>
author:         Realtek WlanFAE	<wlanfae@xxxxxxxxxxx>
author:         zhiyuan_yang	<zhiyuan_yang@xxxxxxxxxxxxxx>
srcversion:     14A7C9ABC9B1C044E6EBB43
alias:          pci:v000010ECd00008179sv*sd*bc*sc*i*
depends:        rtlwifi,rtl_pci,mac80211
intree:         Y
vermagic:       4.1.0-3-lowlatency SMP preempt mod_unload modversions 
signer:         Build time autogenerated kernel key
sig_key:        B5:F9:90:FB:D3:8C:30:BA:EA:DB:EF:46:F8:6E:90:E1:9C:A7:5B:14
sig_hashalgo:   sha512
parm:           swenc:Set to 1 for software crypto (default 0)
 (bool)
parm:           ips:Set to 0 to not use link power save (default 1)
 (bool)
parm:           swlps:Set to 1 to use SW control power save (default 0)
 (bool)
parm:           fwlps:Set to 1 to use FW control power save (default 1)
 (bool)
parm:           msi:Set to 1 to use MSI interrupts mode (default 1)
 (bool)
parm:           debug:Set debug level (0-5) (default 0) (int)
parm:           disable_watchdog:Set to 1 to disable the watchdog (default 0)
 (bool)

In order of preference I'd try "ips=0" then "fwlps=0" since both default
to enabling power-save features.

It is best to test these options manually before adding them to the
system configuration. This can be done by disabling the Wireless
Networking then in a terminal unloading the module and re-loading it
with the parameter, e.g:

sudo modprobe --remove rtl8188ee

sudo modprobe rtl8188ee ips=0

Re-enable Wireless Networking and test. If the failure still occurs
repeat the process with another param. Multiple params can be added to
the modprobe options separated by spaces, e.g.

sudo modprobe rtl8188ee ips=0 fwlps=0


You can check the module has loaded correctly with:

sudo tail  /var/log/kern.log


If none of these tests offer improvements with the Ubuntu kernel versions then testing with the latest v4.2 mainline kernel from the Kernel Team's PPA would be the next step.

-- 
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https://bugs.launchpad.net/bugs/1437988

Title:
  10ec:8179 wireless network and browser issues

Status in linux package in Ubuntu:
  In Progress

Bug description:
  My wireless adapter connecting to my Linsksys wrt120N (firmware
  version 1.0.07) that constantly drops, only when running Ubuntu. Also
  no matter which browser I use it will arbitrarily max out the CPU
  usage and lock me up at times.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-48-generic 3.13.0-48.80
  ProcVersionSignature: Ubuntu 3.13.0-48.80-generic 3.13.11-ckt16
  Uname: Linux 3.13.0-48-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  karl       2708 F.... pulseaudio
   /dev/snd/controlC1:  karl       2708 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sun Mar 29 22:45:34 2015
  HibernationDevice: RESUME=UUID=e720cd76-77cb-4087-bfcc-876f10ecb858
  InstallationDate: Installed on 2015-02-13 (44 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  Lsusb:
   Bus 001 Device 002: ID 8087:8000 Intel Corp.
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 002 Device 002: ID 0c45:6516 Microdia
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Hewlett-Packard HP 15 Notebook PC
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-48-generic.efi.signed root=UUID=fd43416e-9f3d-47f8-826d-37ffc7fdf565 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-48-generic N/A
   linux-backports-modules-3.13.0-48-generic  N/A
   linux-firmware                             1.127.11
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/25/2014
  dmi.bios.vendor: Insyde
  dmi.bios.version: F.04
  dmi.board.asset.tag: Type2 - Board Asset Tag
  dmi.board.name: 8014
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: 10.02
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnInsyde:bvrF.04:bd08/25/2014:svnHewlett-Packard:pnHP15NotebookPC:pvr0974100002405F00000620180:rvnHewlett-Packard:rn8014:rvr10.02:cvnHewlett-Packard:ct10:cvrChassisVersion:
  dmi.product.name: HP 15 Notebook PC
  dmi.product.version: 0974100002405F00000620180
  dmi.sys.vendor: Hewlett-Packard

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