Public bug reported:
I have an Lenovo X220 Laptop. It has the following wireless card (as
shown by lshw)
description: Wireless interface
product: RTL8188CE 802.11b/g/n WiFi Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlan0
version: 01
serial: ec:55:f9:c0:a1:e5
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet
physical wireless
configuration: broadcast=yes driver=rtl8192ce
driverversion=3.2.0-38-generic firmware=N/A ip=192.168.11.10 latency=0 link=yes
multicast=yes wireless=IEEE 802.11bgn
resources: irq:17 ioport:5000(size=256) memory:d2400000-d2403fff
I am running kernel 3.2.0-38-generic.
Recently (in the last week or two) I noticed long dropouts in my internet
connectivity. At first I assumed the unreliability was due to my ISP. We often
have problems during seasons changing but then I noticed the following details,
times are estimated:
1) I would have fairly random dropouts several times (5-20) an hour. Each would
last somewhere around 1-4 minutes.
2) The network manager still showed strong signal (3-4 "bars")
3) My other devices (iPod, other computers, etc) in the house were able to use
the internet fine during these times.
4) I found my laptop unable to ping my network gateway, a router in my house.
These lead me to suspect the problem was with my laptop as nothing else was
having troubles. The logs showed no messages that appeared to relevant. In the
end I downloaded the latest driver. Support for the "rt8188ce" is provided by
the rt8192ce driver from realtek's website
http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PFid=48&Level=5&Conn=4&ProdID=272&DownTypeID=3&GetDown=false&Downloads=true
The version I downloaded was 0012.0207.2013
Here is a direct link to the driver package. I know it looks sketchy but it is
what "US2" points to.
ftp://WebUser:wK9xBuD5@207.232.93.28/cn/wlan/linux_mac80211_0012.0207.2013.tar.bz2
I compiled and installed it with the following commands
make
make install
and my networking has not shown dropouts over the last 12 hours, a vast
improvement.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-38-generic 3.2.0-38.61 [modified:
lib/modules/3.2.0-38-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192ce/rtl8192ce.ko
lib/modules/3.2.0-38-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192de/rtl8192de.ko
lib/modules/3.2.0-38-generic/kernel/drivers/net/wireless/rtlwifi/rtl8192se/rtl8192se.ko
lib/modules/3.2.0-38-generic/kernel/drivers/net/wireless/rtlwifi/rtlwifi.ko]
ProcVersionSignature: Ubuntu 3.2.0-38.61-generic 3.2.37
Uname: Linux 3.2.0-38-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu17.2
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: tim 2170 F.... pulseaudio
CRDA:
country EC:
(2402 - 2482 @ 40), (N/A, 20)
(5170 - 5250 @ 20), (3, 17)
(5250 - 5330 @ 20), (3, 23), DFS
(5735 - 5835 @ 20), (3, 30)
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xd2520000 irq 46'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:14f1506e,17aa21da,00100000
HDA:80862805,80860101,00100000'
Controls : 27
Simple ctrls : 9
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
unknown'
Mixer name : 'ThinkPad EC (unknown)'
Components : ''
Controls : 1
Simple ctrls : 1
Card29.Amixer.values:
Simple mixer control 'Console',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Tue Apr 23 01:24:41 2013
HibernationDevice: RESUME=UUID=ebd0934b-1b74-48c7-b0eb-53871de2b014
MachineType: LENOVO 4286CTO
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-38-generic
root=/dev/mapper/VG00-root ro quiet splash pcie_aspm=force vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.2.0-38-generic N/A
linux-backports-modules-3.2.0-38-generic N/A
linux-firmware 1.79.1
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-05-24 (333 days ago)
dmi.bios.date: 04/01/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET42WW (1.12 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4286CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvr8DET42WW(1.12):bd04/01/2011:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4286CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug precise staging
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https://bugs.launchpad.net/bugs/1171708
Title:
Unreliable wireless connectivity with Realtek 8188ce - Solved
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