Lenovo ThinkPad L R/SL :: L440 - WiFi Works For 5 To 30 Minutes Then Kills Network
Jan 3, 2015
I bought Lenovo L440 few days ago.
I have problem with wifi connection. Wifi works perfect with other devices: phones, tablets, laptops. When I connect to wifi with L440, wifi works 5-30 min. and then crash. L440 kills wifi network. All devices can't connect to wifi until I restart router.
I have read about this problem, but in task manager I can't find "discovery.exe" or LenovoEMC Storage Connector in Contral Panel.
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Jan 20, 2014
The issue was in regards to WiFi not working properly on my Lenovo ThinkPad Yoga S1. After a restart my computer's internet (with WiFi on) would work for a few minutes then it would stop. Long story short, I tried various things, and even uninstalled Norton and other software which I thought may have been a culprit but still the same issue. I also used a USB to Ethernet port (since there is no built in Ethernet port in the ThinkPad Yoga) and connected my computer with a cable and disabled the WiFi to see if it was the wireless hardware not working. Unfortunately still the same issue.
Finally I noticed in the Windows Task Manager a process called "Discover.exe". It turned out this was using some noticeable amount of CPU and wondered what this was doing as I hadn't seen that before. I found out that this was a piece of software bundled in with my computer called Lenovo EMC Storage Connector. I'm not sure why it was running but I ended this process.
Suddenly my internet was working again! This time no problems. I uninstalled this software utility to make sure this doesn't cause this issue again.
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Feb 4, 2014
After i uninstalled Lenovo's Access Connection SW my WIFI does not work anymore.
1. My laptop does not see any WIF newtork (even though available)
2. In the mobility center there is no WIFI option (to switch on/of)
Link to picture
3. In device manager all is fine (I even reinstalled the driver several time)
Link to picture
4. If I use the Intel diagnosis tool fails the hardware test
5. using the FN F9 key, i have the information that WIFI is on
6. wifi is enabled in BIOS
7. in the Network connections. WIFI adapter shows enabled and on properties says that is working properly
Link to picture
Unfortunately i do not have a previous restore point. I reinstalled Lenovo's Access Connections but did not work.
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Nov 5, 2014
I have a Thinkpad L440 with 4GB of RAM.
1. Is it OK to add 8GB (so I will have 12GB in total) or it would be better to add 4GB in order to have two similar SODIMMs?
2. Are there any known incompatibilities for specific brands? I found two SODIMMs from Kingston (part numbers KVR16S11/8 and KVR16LS11/8) and one from Crucial (part number CT102464BF160B). All are clocked at 1600MHz.
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Sep 29, 2010
There are a few configurations of L440 laptops with Nvidia GT 720M grafic cards and Optimus (e. g. 20ASS01G00). Is it possible to change the used graphic system in the BIOS (Intel only/NVidia only/Optimus)? And which card is hardwired to the external ports (VGA, mDP)?
(Do this differ from the T440p or the Edge Series, E540?)
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May 12, 2014
I have the Lenovo L440 (20AT002YGE) with the integrated Intel Graphics.
I have turned off the automatic dimming of the screen brightnes in the windows energy settings and also turned off the energy saver settings in the Intel driver but the screen keeps beeing dimmed when the background is black or dark. This is very annoying when you work outdoor and the sun keeps shining on your display and than it dimms the brightness.
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Sep 9, 2014
I have L440 with 64-bit Win7. Earlier experienced major WiFi connection problems, which were fixed with BIOS and WiFi card driver update.
Briefly after that Wireless Radios Master Control no longer lists Mobile Broadband, it only shows 802.11 Wireless/Wimax and Bluetooth.
Windows Network Connections lists "Mobile Broadband Connection" as "Not connected, N5321 gw Mobile Broadband Driver. Diagnosing this connection suggests to "Turn on mobile broadband capability", which I cannot do as it is not listed in the Wireless Radios Master Control.
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Oct 28, 2014
I manage to pair my 2-in-1 pc Acer Switch 10 with an externat Bluetooth (bt) device only when the tablet is connected to my home wifi network. As soon as I disconnect from the wifi network, the pairing with the bt device is disabled. If I try to pair the bt device when wifi connection is off, the pairing succeeds just for a few seconds (1 or 2) and then it disconnects.
The support assistance of the bt device, since it actually manages to pair with the pc in such wifi wird conditions, suggested that it probably can be a problem due to the chip of the pc that probably manages both the wifi and the bt connections and is not able to manage them separately.
[URL]
and updating the bt driver downloaded from the ACER Drivers and Manuals webpage. However, the installation procedure were interrupted as the installed bt driver appears to be "later".
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Nov 24, 2014
Customer has three L440 with Docking station PRO and Samsung 22" S22C45 on DVI
* W7 64BIT Sp1 Lenovo version not VL
* Latest BIOS
* Latest GFX Driver
* All Windows WSUS Updates (Standard Image from lenovo with all Hotfixes)
* Power Options set to Performance (lenovo Power manager deinstalled)
* Office 2010 SP2, PDF24, APPV client 4.6+
* Dameware 6.X Agent
problem:
Laptop is in docking station with external 22" Samsung DVI and working in Winword, IE or others. Suddenly screen from Samsung turns black (laptop TFT from people who use dual stays on). After 1-10 seconds the samsung screen comes back. We fiest thought this was some RDP issue with other users connecting to the device. (Not the case)
NO > BIOS and GFX is latest and MADE it worser with updating to the latest (happens more often).
NO > MHz change from 59/60 or slighty modify did not solve
NO > It's not a screensaver problem
NO > All three Samsung are from diffrent shippments and even Distributors
NO > All three L440 are from different time periods 2-3 Months split
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Apr 7, 2014
I have a Lenovo L440 laptop with a think pad pro dock. The HDD is encrypted with TrueCrypt and needs a password before windows will boot. The laptop will not display out to the monitor attached to the dock before windows loads. I have changed the bios setting Config > Display > Boot Display Device, as well as all the other display options, but it does not make a difference. I have tried with a VGA cable and a DVI cable and neither works. I have tried with 2 different L440s and 2 docking stations with the same problem occuring on both. I have successfully used a Lenovo L540 laptop with the same model of docking station. I have also updated to the most current bios version.
I'm wondering if I'm missing something or if the L440 model simply does not support this function?
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Mar 1, 2014
When I pause playback of an .mp3, there's permanent white noise coming from the internal speakers.
Stopping the playback stops the white noise after approximately 4 seconds. I never had this issue with any laptop / soundcard. Can this be fixed?
I have the latest BIOS and drivers installed. Headphones are fine (no white noise).
Maybe the inbuilt L440 soundcard has a problem. I had to return my first L440 because there was a loud plop when starting playback and the left speaker was way quieter than the right one.
In the German part of this forum people are reporting problems realted to the internal speaker (cracking sound, white noise).
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Dec 30, 2012
I purchased the Lenovo Z580 laptop last month. It is a very good laptop, very silent and well built. Coupled with Windows 8 (64 bit), its a very new experience all together, especially the uptime after restart, connectivity etc. Superfast!
I've been traveling around the world offlate and after I was back home recently, uunfortunately, I'm facing a wired problem with the Wifi since then.
Nature of the problem: After restart, sleep, turn PC on:
1/ Wifi shows full signal status at the start screen.
2/ I enter password to login and it takes to W8 start screen. I then goto the desktop mode.
3/ When I launch a browser I can't connect to internet but the wifi status says 'Internet access'. But after few seconds, I see grey wireless symbol (without any signal bar) with a star on the left corner of the wifi symbol (Not connected mode).
4/ The network I connect to is no longer visible. Only 2 networks are detected. One is an open network and the other one is a different network. Usually several networks are within the range when I'm connected to my network.
5/ After 4-5 minutes, everything becomes normal i.e. the wifi adapter connects to the network.
I've tried router/modem power cycle, disable/enable wireless network adapter and they haven't solved the problem yet. Also noticed something in the Wi-Fi Status (wireless adapter settings window) accessed via Control Panel. Speed initially was 39.0Mbps and eventually changes to 72.0Mbps, drops to 65.0Mbps...
I don't have this problem with the other laptop and tablet I own.
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Sep 17, 2013
So, I have B590 Lenovo Notebook with Windows 8 and the Wi-Fi doesn't work well.
When I try connect at home, my Wi-fi works fine. Not problem. But when I try another one - e.g. In School or somewhere in the city, the others wi-fis don't work. Windows 8 tell me something like "It's not possible to connect" .....
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Jul 6, 2008
I am trying to connect my E520 to a wireless router. The router isn't connected to a modem, it will just be used so I can transfer files between two wireless devices. The wifi router is functioning properly as I can cannect to it with the wifi on my phone. However my laptop doesn't even see any wifi networks to connect to. The wirless "radio" button (F9) is on.
What happens.....
- There us is no visible wifi network.
- I can connect and access the router and its settings using the ethernet cable.
- 1st method - When I go to "Network and Sharing Center" I select "Setup a new connection or network". From the box that appears I select "Setup a new connection". The next box asks me to choose a wireless router from the list and informs me it may take up to 90sec for a router to show up. However no routers show up at all even after 30min.
-2nd method - I go to "Network and Sharing Center" I select "Setup a new connection or network". From the box that appears I this time select "Manually connect to a wireless network". Thsi time I get a box with an error "An unexpected error occured". It doesn't give any more information than this and I have looked in the logs and though I don't know what I am looking for nothing jumps out.
-3rd method - I go to "Manage wireless networks" and click on the "add" button. The box that appears asks me to choose between "Manually create a network profile" or "create an ad hoc network". Choosing either of these reslts in the same "unexpected error" with no information.
Things I have tried:
- Uninstalled the wireless card drivers and installed the latest ones. (device manager says device is working properly).
- let windows try and update the driver.
- Turned off my firewall and internet security and tried again.
- Disabled power management for the wireless card.
- Physically checked the card in the base of the laptop - all seems ok.
Win7 64bit Home Premium
Zonelalarm Extreme
D-link DIR_600 wifi router.
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Dec 7, 2012
I bought my ThinkPad T530 laptop in August of this year and about a month ago I used the Lenovo ThinkVantage updater and it updated the driver for my web cam. Ever since then it has stopped working.
Whenever I open the web conferencing menu, it only shows options for the microphone, and nothing for the camera. I have tried hitting Fn+F6 and accessing it via other software e.g. Skype, Oovoo, Picasa. And they say that my webcam cannot be detected.
When I checked for the webcam in device manager it said it was installed and working properly, and that the driver was up to date. I went to the lenovo website and downloaded the driver for the camera from there (g1ca16ww) and tried to update the driver manually hoping that that would fix the problem. Alas, it did not. I also checked the BIOS settings to make sure that the camera was enabled. It was.
So then I tried to reinstall the driver by uninstalling it, and using the driver I downloaded from the Lenovo website to reinstall. It installed properly, but now the webcam is no longer listed in the hardware manager and the dropdown for Imaging Devices, where it was located before, is no longer visible. I also rechecked the BIOS menu to make sure the camera was still listed there and it is. I do not know why it isn't working. I have also tried system restore and that didn't work either, the device still isn't listed. I don't want to have to wipe my computer.
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Oct 30, 2013
My current x230 is set to "Automatically optimize for battery lifespan" under battery maintenance. I read that for this settings, it'll set your battery to hover around 80%~ base on Lenovo forum under w530 section. However, i'm always seeing my battery at 100% when AC is plugged in; Remaining capacity: 62.47 wh ; Full charge capacity: 62.47wh. Is it suppose to be lesser? I suppose it not healthy for the battery to be constantly kept at 100%. Any x230 users experiencing this too?
Would like my battery to last at least 2 years. usage :70% AC plugged in,30% on the go.
Updated to the latest Power manager 6.63.1
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Oct 3, 2013
My new Lenovo Z580 runs windows 8 64bit, core i3 3rd gen, 4gb RAM.
The problem is, since day 1,every few minutes the internet stops working. It shows as connected, the router is working, other connected devices run as intended and everything's fine. But internet doesn't work on my laptop. It says "Could not connect to the network". I have tried doing the "keep wifi on during sleep" etc. but nothing works. It just stops working after a while even though I am using the laptop, it just suddenly stops. It even shows as connected, and packets are being received but internet or any application over the internet will not work untill I disconnect and reconnect.
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Dec 21, 2009
My brand new Flex 2 14 periodically disconnects from the network on Wi-Fi. This is pretty unacceptable. Other PC's in the house are not experiencing the problem, so it's difficult to blame the router.,
I have a Broadcom 802.11N Network Adapter device with driver version 6.30.223.201, which is the latest on the Lenovo site. I am running Windows 8.1, as provided on the system. I've installed Windows updates and some other software, but have not otherwise changed the OS.
I have seen other users with similar problems, but no fixes for Broadcom.
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Jun 6, 2013
My lenovo g570 laptop does not found network adapter for wifi and blue tooth it did not recognize the hardware part may be. because i install software for that so may time. few days back i used wifi as well as bluetooth in my lapi but for last two or three month i just used lan for internet connection and in between i changed my os which is win 7 ultimate to win 7 proff. I don't know what is the reason for that.
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Feb 28, 2014
For some reason after some of use the Laptop, the wifi network card gets disabled and not useable. Trying to enable it doesn't work.
I tried to update drivers, and check all webs on this issue but with no solution. Bios updated, Bluetooth works fine.
I use windows 8.1 64 bit. I installed power manager. No success ....
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Oct 5, 2014
I've read other forums on similar issues, but I can't seem to find one that matches mine exactly.
System: Y410p with
1tb hdd
24gb ssd
intel i7-4700
8gb ram
64x windows 8.1 (came installed)
Problem:
When I put the computer into sleep mode, it goes into sleep mode without issue. It has stayed in sleep mode for a maximum of 8 hours, but usually before it hits this long the system will turn on. It seems to run random processes and overclock the processor as the computer gets very hot. It will do this until the battery dies, or if plugged in, indefinitely.
While it is doing this I have opened the lid, pressed every key, including power, with no response. Once, and only once, upon pressing the space bar, it had actually come to the unlock screen as though it truly was in sleep (except it was still overheating and on). Otherwise my only option is hard shut down.
I've just gone around it for a while now by shutting down every time and not using sleep. But today I had put it in sleep, and placed it in my backpack where it nearly cooked itself to death.I have tried:
-I have checked the wake_armed, which currently display NONE
-I have checked last_wake
-I have fiddled with hybrid shutdown.
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Oct 25, 2014
I've got a ThinkPad T520 and I just bought a Netgear N600 Dual-band Cable Modem Router but my laptop isn't seeing the 5GHz wireless network? Is it even capable of doing so?
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Jul 24, 2014
On my new X1 Carbon, I can only do CIFS sharing via Ethernet. If I connect via WiFi, sharing stops.
Both Ethernet and WiFi are listed as private networks, so I would think they have the same settings. How can I get Windows sharing to work over WiFi?
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Sep 8, 2014
I bought my HP 15 a few days ago and since yesterday (after I restarted it) it can't find my network. Also, sometimes it finds all the surrounding networks, sometimes one or two, sometimes none of them, but it never shows mine.
All my other devices connect to the network just fine and also when I connect the laptop via Ethernet cable internet works normally. I tried reinstalling the adapter and driver, but nothing happens, the problem is still here.
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Feb 14, 2014
I just got a new Thinkpad 540p but it can't consistently connect to my home wireless network. Since a day of getting it, it was able to connect on 3 separate occasions. One being the one during the initial set up which was fine. But after that it will resort to a limited access state after a few minutes as well as with the other instances that I was able to connect. The same thing happens if I try to restart it right away after connecting. It goes to limited access. If I disconnect and try to reconnect, it won't allow me to. It prompts me to a troubleshooting step which did not work at all. I've been trying all day and night to look up solutions but with no clear one ....
This one runs on Windows 7 btw.... The wireless adapter is just a 2x2 11b/g/n wireless lan m.2 adapter... updated drivers and everything. Also, none of our other devices such as mobile phones and an HP desktop have problems connecting.
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Nov 14, 2013
I have a problem with my L530 and the WiFi Connection. When I start the computer and see the Login-Screen of Windows 8.1 the networkicon left to the betteryicon have a red cross. After I log into Windows 8.1, I have no wireless connection availible. In the devicemanager is no wirelesscard listet, also there are no other problems with other devices.
After restarting, power off/on, removing the battery and so on about 1.000.000 times the wireless card is pretty working to the next shut down. So my workaround was to use the standby mode instead shut down after I've finished working.
UNTIL yesterday! Now I can't enable the wireless card... This card is installled: ThinkPad Wireless LAN (11bgn, bg)
I've tried the following things:
- UEFI is on version 2.56
- loading UEFI defaults, save and reboot
- remove the battery and power plug -> push the power button for 10 sec
- disable hybrid shut down in windows
- booting with ubuntu 13.04 -> no wireless hardware available...
Nothings works...
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Jan 26, 2015
My SL510 work fine, but just want to know, when I open it for replace the keyboard, I found 1 intel centino mini wifi card N1000 with antenna and at the back an other one is broadcom mini wifi card 802.11g without antenna. My question is: for what function is broadcom mini wifi card 802.11g without antenna? All of 2 are presents as well in device manager...
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Apr 25, 2014
My ThinkPad X1 Carbon keep dropping the WiFi randomly. I have another computer, HP. This kind of situation never occur to my HP. So I am sure this problem does not relate to my router.
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Jul 24, 2014
On my new X1 Carbon, with a new Netgear R8000 router, The X1 will not hold a wifi connection, even 3 feet from the router. There is plenty of signal strength on all 3 channels. It connects for a while, but then the icon turns to "limited", and I have no internet connection. It works with my older Netgear WNDR 4500. Xirrus Wi-Fi Inspector sees the three channels with plenty of signal, but will not plot them. I even tried reducing the maximum rate to 289 Mbps, and it still will not maintain a 5 GHz connection.
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Aug 14, 2012
I updated my Thinkpad with windows 8.1. But the wifi driver doesn't work correctly. After the installation the device was diasabled with code 10. I searched for a new driver and found one from Realtek for win 8. After this installation and the reboot, the wifi works fine. Restarting the notebook again, the device was disabled again. I tried a lot of different drivers - it's always the same: After the first installation and reboot it works, after the second boot, the device is disabled again.
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