Ubuntu Networking :: Wireless Slows Down When On Battery ?
May 31, 2011
I have Ubuntu 10.10 running on a Dell Latitude E6500 notebook and am using the Broadcom STA wireless driver (just in passing, same happens on Mint 10).
My problem is this:
- when the computer is plugged into a power outlet, wireless works fine, but
- when the computer is running on battery, it hardly works at all: The network strength indicator item still shows the same connection strength but data are not transmitted anymore or only extremely slowly (google.com might 2 minutes to load).
The drop in performance literally happens 1 sec after unplugging it, and once the notebook is plugged into external power again, it resumes after a few seconds. (I have tested this with big downloads where you can see Firefox's or the Update Manager's download speeds.) The BIOS doesn't seem to have power saving settings that make that happen, and I haven't found any in Ubuntu.
Unlike a lot of others, I have had no problems getting the wireless on my Dell Studio 1558 working with the STA driver. As long, as I am not on battery, that is. Within minutes of switching to battery and disconnecting from the LAN, my system freezes: I cannot move the mouse, the keyboard is useless (I can't even Ctrl-Alt to a terminal) and my only option is a hard boot.I currently have the 2.6.35-23 kernel and I have tried the following driver options for the wireless (all the below were tried with 2.6.35-22):
- the Broadcom STA driver in the repos- the latest STA dirver from Broadcom- the new broadcom driver, not yet available in ubuntu repos (brcm80211)- ndiswrapper ( I can only get win 7 drivers for my laptop, so this does not even enable the driver)My Wifi card uses the BCM43224 chipset.After a freeze, I have pored over the logs and I cannot find any obvious error messages preceding the event - so I am a little at wit's end ito resolving this. Can anybody give me any clues as to where I should start looking to resolve this issue?
Hardware: Vostro 3500, BCM4353Ubuntu 10.10Today I decided to test uptime on battery. But when I started using battery I noticed that internet connection is very slow(around 1-4 KB/s, normally ~128KB/s).I used Code:iwpriv eth1 set_pm 0(pm = power mode? And what means this parameter 0, 1 and 2?)and everything seems to be ok now.And my question is - where can I edit which power mode settings for wifi are used on battery?
I am running Ubuntu 11.04 32Bit on an ASUS Eee PC 1015PX. I have found a strange anomaly concerning wireless connection when running on battery power. I have been experiencing very slow performance when connecting to my home NAS and also the internet through a wireless connection when using my netbooks internal wireless card (Broadcom Corporation BCM4313 802.11b/g/n (rev 01)) when running on battery power. The card works fine and connects at full speed when running on mains power but as soon as I switch to battery power the card connects to the internet/network fine but the connection speed is very slow indeed. I am using the Broadcom 802.11 Linux STA propriety wireless driver.
Broadcom 4312, dell inspiron 1545.Earlier i was running on battery power and the laptop shut down when the battery got low. When i got back to it and restarted there was no wireless network. It's grayed out and says wireless disabled. How do i fix this?
I'm running Ubuntu 10.10 netbook edition on a Dell Mini 9 - worked around a few wireless issues on setup and connectivity has been fine, but now I'm suddenly losing wifi when I unplug my AC adapter. It still shows me as connected, but when I try to view web pages in Chromium, it will load pages for a few seconds, and then suddenly cuts out - though it still looks like it's trying to load the page.
It's the same if I boot on battery power - it will keep trying to connect to wifi but won't until I plug in the adapter. I'm assuming this probably has something to do with my power management preferences in battery mode, but I'm still pretty new to Ubuntu, and I'm not sure how to fix this. I've played with the options in power management, but I have a feeling there has to be more. Can anyone help me? This has been really frustrating.
I have a problem with my wireless where when running the laptop from the battery the connection is very slow. When the laptop is connected to the power supply everything is fine, but the moment it's disconnected and run on the battery the speed drops when browsing the Internet or accessing files on other computers on my network.
The laptop is a Samsung SF310 Wireless chipset is BCM4313
In attempt to fix this I installed the latest drivers from the Broadcom site using this guide. When I enabled these drivers everything worked well. I did speed test and got the same speeds I get when connected via Ethernet:
Ping 51ms DL 4.31 UL 0.65
So I set the drivers to load at boot using this forum post as a guide as the steps in the Broadcom guide didn't work and rebooted the laptop on battery power. The wireless connected fine, but the slow speed problem had returned. Running a speed test got the following results
Ping 235 DL 0.54 UL 0.30
So I ran iwconfig when running from battery and then from power supply. Code: xxxx@xxxx ~ $ iwconfig lo no wireless extensions. eth0 no wireless extensions. eth1 IEEE 802.11 Access Point: Not-Associated Link Quality:5 Signal level:215 Noise level:160 Rx invalid nwid:0 invalid crypt:0 invalid misc:0 As can be seen the signal quality is 5 and signal level 215
Code: xxxx@xxxx ~ $ iwconfig lo no wireless extensions. eth0 no wireless extensions. eth1 IEEE 802.11 Access Point: Not-Associated Link Quality:5 Signal level:214 Noise level:164 Rx invalid nwid:0 invalid crypt:0 invalid misc:0
And when connected via the power supply the signal level is 5 and signal level 214. There may be some kind of power saving issue, although there are no relevant setting in the BIOS and I can't see anything in the various wireless control pannels. I have other wireless drivers and there are no problem with those.
Today my laptop battery died and after i plugged it in and restarted it said that networking was not enabled. hitting the networking key didn't re-enable it. i right clicked the wireless icon in the tray and clicked "enable networking" and it enabled it but no networks showed up as available and the networking status light on my keyboard stayed red. I've restarted the computer several times to no avail. anyone know what i need to do?
I have an Asus Eee PC with Ubuntu Netbook Remix (Unity). The other day, I turned off the wireless using the keyboard shortcut to save battery life when I was somewhere without wireless, but now it's not turning back on. I tried restarting, I've done the keyboard shortcut several times, and it still just says "disconnected" for wireless and wired, even though there are several wireless networks around me right now. There aren't any options in Network Connections or Network Tools to turn on the wireless. Is there a way to manually turn it back on?
I just got a Lenovo Thinkpad x100e. Everything seems to be running well, with this exception of the wireless adapter. When running on the battery the wireless runs for about 30secs to 1 minute before dropping out. The NetworkManager says it's still connected, but nothing goes across the network. Disabling and then re-enabling the wireless works, for about 30 sec to a minute. The weird thing is this behavior DOESN'T occur when the power adapter is plugged in.
I'm wondering what power management parts I should be looking at? I'm running OpenSuSE 11.2, KDE 4.3.5 if that helps.
Problem as in title: on AC everything ok, but on battery my wireless is not working.openSUSE 11.4, gnome 3.0lspci:Code:03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727] (rev 01)Subsystem: Askey Computer Corp. Device [144f:7179]Kernel driver in use: wl
I have a Actiontec m1000 modem from Qwest that seems to offer more speed to my brothers Windows PC then my Linux PC (same make and module) I checked the ping on all systems, and they all look fine. The only thing that seems different is the number of open sessions in the modem, Linux only uses 2, and Windows uses 80. My guess is that the modem uses sessions to control the bandwidth, but I don't know how to add sessions to Linux networking to compete for bandwidth. I did test in the same browser.
I'm using OpenVPN to connect to a remote system. When I run
Code:
It brings up a new tunnel interface. The problem is that once the tun interface is brought up and the VPN is established, my whole Internet connection slows to a crawl.
Here is the output from ip route show before openvpn:
I am programmatically doing a large FTP upload (about 5 Gb's of 2-3 Mb files) from my Windows 7 machine to a ProFTPd server on my Ubuntu box. When the program is run, transfer rates are huge! but as run time continues, transfer rates drop off significantly and eventually slow to a halt resulting in a:
Quote:
Read Timed Out
error.
The rest of the uploads fail due to Socket Read Errors.
I'm having a weird problem that I'm hoping someone can help me with.
First some specs: F13 NetworkManager Applet 0.8.3.998 Driver r8169 Opera 11 and Firefox 3.6.16
Recently my ISP switched to PPPoEand since then my internet connection has been giving me problems. While browsing, some websites load fine, some websites load fine after I refresh once or twice, some load really slowly and the formatting tends to be messed up and some websites won't load at all (they stop at waiting for website...). Ping for all of these sites is however fine. Also uploading and downloading either from sites like rapidshare or using torrents is also fine. The same ISP also provides a second similar connection which is connected through a wireless router (mine is connected directly - no modem or router) to two computers (one via a wired connection and one through wireless) both running Win 7 and everything works fine over there.
Things I've tried. I tried using the router changing it's setting to my connection and connecting through that but the problem remains. After googling I thought it might be an MTU issue so tried this:
First some specs: F13 NetworkManager Applet 0.8.3.998 Driver r8169 Opera 11 and Firefox 3.6.16
Recently my ISP switched to PPPoEand since then my internet connection has been giving me problems. While browsing, some websites load fine, some websites load fine after I refresh once or twice, some load really slowly and the formatting tends to be messed up and some websites won't load at all (they stop at waiting for website...). Ping for all of these sites is however fine. Also uploading and downloading either from sites like rapidshare or using torrents is also fine. The same ISP also provides a second similar connection which is connected through a wireless router to two computers (one via a wired connection and one through wireless) both running Win 7 and everything works fine over there.
Things I've tried. I tried using the router changing it's setting to my connection and connecting through that but the problem remains. After googling I thought it might be an MTU issue so tried this:
ping -M do -c 3 -s 1464 www.myce.com and got PING myce.com (212.204.237.148) 1464(1492) bytes of data. 1472 bytes from www.myce.com (212.204.237.148): icmp_seq=1 ttl=47 time=129 ms 1472 bytes from www.myce.com (212.204.237.148): icmp_seq=2 ttl=47 time=129 ms 1472 bytes from www.myce.com (212.204.237.148): icmp_seq=3 ttl=47 time=130 ms --- myce.com ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2133ms rtt min/avg/max/mdev = 129.261/129.683/130.044/0.436 ms
This works for various websites whether they load or not. My MTU is set at 1492 but I've tried various lower numbers all the way down to 1300 but no luck. I tried disabling ipv6 in Firefox but no change.
I have searched every now and then (every time the batteries act up) to find a way to get the battery level from my keyboard and mouse. It seems like the most basic thing, but it also seems unsolved in all the threads I have found.
Mouse: Microsoft Intellimouse Explorer 2.0 [Model:1007] Keyboard: Microsoft Wireless Photo Keyboard [Model:1027] Ubuntu 9.10 Kernel 2.6.31-22-generic Gnome 2.28.1
I have 64bit ubuntu 10.04 installed on lenovo ideapad y450. recently, i ended up using the laptop on battery till it died and the wireless doesnt' seem to work after i restarted the laptop after connecting the AC adapter.
When i go to network manager, i see wireless is grayed out and it says it is disabled ( the hard switch on the laptop for wireless is turned on).
Doing some research on forums, i did a sudo lshw -C network and the first line of it says *-network DISABLED and the description is for wireless interface. I can't post the output of the laptop as i don't have a LAN connection or a usb drive to which is can copy and then post it here.
The product is PRO/Wireless 5100 AGN [shiloh] Network Connection from Intel
When i did the rfkill list, i got:
0: phy0: Wireless LAN Soft blocked: no Hard blocked: yes
I have been using Ubuntu without any problem for 2 years. Yesterday, when I booted Ubuntu, its power management is not working at start up: icons for battery, speaker, wireless not there + light icon says "cannot connect to gnome-power-manager".( in the screenshot) When I go System - Preferences - Power Management (1), it corrects only the light icon.I could only bring back wireless icon by "nm-applet" after doing (1).But other icons are not there still.
Just installed 9.10 followed by a 10.04 upgrade (wouldn't work as a 10.04 clean install). The install and upgrade all seemed to go well.
But now when booting I get a message saying "checking battery state" and then it boots no further. This is a laptop without a battery installed, running permanently from the mains through the charger.
How can I disable this check so that the laptop will still boot without a battery fitted?
getting back to our laptop, the stability window is ~3.2V. Meaning that when you operate the battery above this the electrolyte is oxidized on the positive electrode and reduced on the negative electrode. Remember that we only want to oxidize and reduce the active materials and don't want to do anything else. All these reactions other than the ones we want are called side reactions and these are really bad for the battery. The nominal voltage of a laptop battery is 3.7 V which means that something bad wants to happen as we use the battery.So long story short, stuff (e.g., passive layers and poor kinetics of reactions) happens and things are not as bad as they seem and you can increase the voltage up to 4.2V without bad things really happening. All chargers for Li-ion cells today cut the battery off when it reaches 4.2V. What you have to realize is that at 4.2V, these side reactions are present in finite amounts and start to chemically kill the battery, but its not that dramatic.
Operating to 4.1V makes things better and extends the life, 4.0 V is even better and so on. So why don't battery manufacturers cut the voltage off at, say, 4 V to get better battery life? Because every time you cut this voltage down you decrease the capacity of the battery and its run time. The 4.2V cutoff is a compromise between good run time and decent (read "not pathetic) life.On the other hand, if you charge the battery and then pull the plug (so to speak), the battery discharges some, the voltage drops, and these reactions become less of a problem and your battery life goes up. So the best things you can do is to charge the laptop (or cell phone, camera etc.) and once its charged, pull the plug. Your battery will thank you for it.As a matter of fact, if you own a Lenovo Thinkpad, you can actually change the state of charge to which you charge the battery using the Battery Maintenance utility. You can change this from charging to 100% state (where the voltage is 4.2V) to 90% so that your voltage is less. You lose some energy is doing that, but atleast you can change it to 100% when you need battery power and put it back down to 90% when you can plug in. I wish my Mac has the same feature.
I typically use the battery for a while (say 1/2 hour to 1 hour), then plug it in and wait to fully charge it, then I pull the plug and use it again for 1/2 hour to 1h and then I repeat this. Takes some getting used to and I forget to do this, but I try.
I have a 3 year old laptop with the original battery and its drained pretty bad. The "Battery may be broken" popup was driving me insane and this is how you disable it, in case you are in the same situation as me. Open terminal
Code: gconf-editor Drill down to... apps --> gnome-power-manager --> notify
uncheck the low_capacity checkbox. This should disable the popup for you if your battery has little life left in it. Now, if any knows how to disable the Avahi popup, let me know.
I have no Wifi on Battery Power?My wifi quits when power cord is pulled? I plug in the power cord and wifi works again?Dell XPS 16 1645 Ubuntu 10.10Much appreciated for a link to solve the problem or instructions
I have a Dell 1501 Inspiron laptop and have swapped out the broadcom network card for an intel 4965AGN so I can use n-speed with my new router.Everything works sweet except my laptop now crashes if I try to run on battery power.It boots up to the login screen, but once I enter password and login it crashes, just get grey screen and everything locks up. Everything works fine on mains ?It's not a major problem for me as I don't use the laptop "out in the wild".
just installed Ubuntu on my Macbook Pro and im loving it right now, but whenever I disconnect from the power source and run from battery, my wifi Internet slows down to a crawl. As soon as i plug the power back in, the internet is back to normal.
I've got a Toshiba Satellite with the Realtek rtl8188ce network card. I've successfully downloaded, compiled and installed the driver and it works great except when running the machine on battery power when it constantly disconnects, like every minute or two.
Is there any USB mouse battery indicators for Ubuntu that can tell me the battery level of my Logitech USB mouse? (something like a laptop battery one) I want to add it the panel.
I have just upgraded to 11.04 from an earlier version and most things are working better, if a little slower. Had to remove pulse audio to get any sound. Wifi with Edimax 54G Pcmcia card used to work fully, but now only works on mains, not on battery.Suspected power management but iwconfig shows it is off.Dmesg revealed that the driver had crashed in rt61pci.
Code: [ 452.171536] BUG: unable to handle kernel NULL pointer dereference at (null) [ 452.171559] IP: [<e0a441df>] rt61pci_config+0x1f/0x180 [rt61pci]
I am using a Fujitsu Amilo pi3560 with a Realtek rtl8172 wireless card, and running the latest driver (rtl8192se_linux_2.6.0014.0115.2010). The OS is Ubuntu 9.10. Everything runs perfectly - when my laptop is connected with the power cord. But when I go battery the wireless disconnects after a few minutes. It then asks for the wpa password, searches for the router, asks again, and so on indefinitely, until I reboot and it all replays once more.
