Ubuntu Networking :: Turned Off Wireless Using Keyboard Shortcut To Save Battery Life - Now Not Turning Back On
Jan 24, 2011
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?
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Mar 2, 2010
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.
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Jan 28, 2011
If I change the keyboard shortcut for Open a Terminal in System > Preferences it will not stay in there if i log-out or reboot. When i log back in the shortcut is set to disabled, and I have tried different key combos and they give the same result. I am using Fedora 14 btw and hopefully you guys know of a solution. I tried making a custom command also using the gnome-terminal command but the terminal launches with a different directory other than my home directory when using that method.
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Feb 2, 2010
The wireless connection works fine. The wireless switch automatically turns itself on every time I start the computer. However, after turning it off, I can't ever turn it on again unless I restart the computer. And because of this, the wireless connection is disabled until the next time I start the computer.I don't think this is a hardware problem because the switch can be turned on and off, although not in the way I expect.
I'm using ubuntu 9.10 on an Acer Aspire 4740G. The command [lspci | grep Network] shows Atheros Communications Inc. AR928X Wireless Network Adapter (PCI-Express) (rev 01). the [rfkill list] command shows (when the switch is on)
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
and, as expected, shows (when the switch is turned off)
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: yes
I just want to be able to turn the switch on or off at any time I want as long as the computer is still on.
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Aug 31, 2010
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.
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Dec 20, 2010
is it possible (and how) to create keyboard shortcut/binding that would give window-focus back to Tilda terminal? Currently, it is necessary to LMB-click inside Tilda (or at least drag mouse-cursor over Tilda) to resume typing.
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Feb 23, 2010
Is Ubunutu better than Windows 7 for general battery life?
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May 12, 2010
So, I never got great battery life with 9.04 or 9.10, but it was acceptable. Here's the thing, with Windows 7 I can get about two hours. With Ubuntu I'm lucky if I get an hour, and I mean really lucky. I have selected to dim the brightness and to spin down the HDD when possible, it hasn't helped a whole lot. What I don't see is an option to underclock the CPU, which is done rather easily in Kubuntu.
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Apr 30, 2010
Installed Lucid netbook-remix on my Aspire One with SSD and 3 cell battery last night. Under 9.10 I got 2hr 15mins with wifi and up to 3hr without wifi. This morning on the train to work I booted the new release only to find that without wifi I'm now getting only 1hr 20mins battery life (fully charged battery). I have the brightness turned down low to try and save a little power but it makes no difference. What can I do. As this is a netbook-remix release having just over an hour of battery life is plain awful and impractical.Any suggestions to increase battery life?
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Feb 24, 2011
So I've been using Ubuntu on a Toshiba L645d, and after a few hiccups with the sound and wireless, it's finally working well now. However, the battery is still a bit less when compared to Windows 7 (2:00 vs 2:35, but it came with optimizations on W7 so that might be the reason. A comparison of power used: 25w of power on Ubuntu vs 17.5 on W7.
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Mar 3, 2011
I've used an older version of ubuntu before, when it was brown and orange. I ran it off of a 8 gb solid state express card. Used it for about a month, didn't like it because I didn't know how to install anything and because it was slow (because ran off of a express card). Now, I'm looking to try ubuntu 10.10 on a partition of a main hard drive, specifically on the chrome os laptop when it comes out.
Now, I've read up that the battery life for ubuntu is mysteriously worse than on what would run a mac or a windows. This battery life issue is driving me away from ubuntu. How much battery life would I actually get for ubuntu if my battery life lasts 4 hours running a windows 7? And how much hard drive space do I need to partition to install ubuntu?
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Apr 1, 2010
I have a Samsung R510 laptop, with a short-life battery (holds up to 1.5 hours) Is there any way to make my laptop work longer by using some tweaks? Maybe it is possible to change the CPU according to the load?
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Jan 8, 2011
I bought a dell mini 10v last spring and I have always gotten around 2-2.5 hrs max battery life. Is that all this 3-cell can pull off?
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Feb 4, 2011
I currently use windows 7 on my laptop which gives me on average on 2 hours of battery life. If replace windows with ubuntu, would it allow more battery life time? I am a student, and I always have battery life issue when I work at uni.
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Mar 3, 2010
I've decided to format my netbook entirely and just run NBR. I still need a windows install because a lot of stuff still doesn't work correctly in wine.
will running a virtual windows install kill mu netbooks battery life quickly or is it the same as running any other program? also what's a good virtual OS program? I think the only one I know of it vmware or something?
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Jun 16, 2010
My battery life in Ubuntu is much less than that of Windows 7. I am trying to find ways to improve my battery life in Ubuntu. One thing that I notice is that my CPU (Intel Core i7 on a Lenovo Thinkpad W510) always runs at 55 degrees Celsius or even higher. my GPU right now reads 51. Seems pretty toasty to me, but not too over the top. Is it abnormal to have this as an average temperature? (since writing, it has risen to 57. I am on AC power, listening to music with Rhythmbox and browsing the web in Google Chrome.)
My cpu mode is set to 'ondemand', and I think this is a good option to balance power and speed. I am wondering if there is a similar function for the gpu. In my Nvidia settings my "PowerMizer" preferred mode is set to adaptive. Is that essentially all the improvement I'm going to get? In windows it seems like the amount of heat coming from the fan corresponds to running cpu/gpu intensive programs. When I'm not doing much, the exhaust is not as hot. In Ubuntu 10.04, the stream of heat is relatively constant. It does increase with more use, but it seems that the base temperature is higher.
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Nov 14, 2010
I've been using Ubuntu for the past four years, but I recently bought a Dell Mini 1012, and while Ubuntu 10.04 is wonderful in every way, it is giving me quite poor results in terms of battery life, compared to Windows 7 which is also installed on the device. I have been able to get 4.5 hours out of Ubuntu,compared to the 8 hours I have been able to get with Windows 7 Starter. I have tried everything suggested here in order to get better battery life out of Ubuntu, but without success.I'm wondering if I might have better success with another distribution.Are there any Linux distributions available that can claim longer battery life than others, on netbooks and in general? This question can be answered objectively if it is backed up with hard data from based on benchmarks,
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Jul 6, 2011
i recently purchased my second laptop, primarily for linux. When i chose it, my main concern was battery life. Just to make a side note. When i say battery life, i mean how long the computer takes until the battery goes flat. Not how many years/ect it takes till the battery will no longer hold charge.
My new computer claims to be able to get 10 hours. Although it's a bit off, i get a satisfying little bit over 6 hours, from full charge. This is running Windows 7. I couldn't wait to put Linux on my new computer, i have, but it just isn't satisfying because i only get about 4 hours while running linux, tried three different distros, and all roughly the same.
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May 19, 2011
Recently I have installed Fedora 14 on my other laptop. It's a dual boot with Windows 7. Everything worked perfectly fine, networking included, until my friend didn't accidently turned off the wireless by pressing a wireless button on the laptop. Since then the wireless on Fedora doesn't work. It does on Windows thought. I've tried restarting the laptop few times, but the wireless still doesn't want to work again.
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Jun 2, 2011
I just upgraded to f15 x86_64. I use a VPCCEB3Z1E vaio laptop and I noticed that my laptop can't last more than half past an hour running from battery in wireless productivity (just surfing the net and make some word processing, so nothing so heavy...) I use kde 4, installed cpupowerutils (replacement for cpufrequtils), put the modules acpi_cpufreq, cpufreq-ondemand -powersave and the other governors in /etc/rc.d/rc.local for loading them at boot. Edited profiles in powerdevil (every profile has cpupowerutils freq-set -g and the name of a governor) but i still notice no changes. How I can get a better power management on this laptop? Fan still runs at high speed.
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Feb 24, 2011
First issue is, now that I am running Debian "Squeeze", my laptop runs much hotter than before. Its definitely hot on the very bottom compared to when running Windows. Once the system begins to heat up, the fans start spinning faster, the system gets louder, etc.
Second issue is battery life. I am able to get 5 hours out of the laptop in Windows, but maybe 2.5 hours in Debian. I am assuming that these two problems go hand in hand. Now from experience with PC hardware, I know that the newer chips scale their frequency and voltage depending on demand. I don't think the computer is doing this correctly when running Linux.
By running
cat /proc/acpi/processor/CPU0/throttling
I see that the CPU(s) are in T0 state (or 100%). Manually setting the frequency doesn't change anything either (via the gnome applet). Am I diagnosing this correctly?
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Dec 31, 2009
This link, acpi: thermal/sysfs-api, explains how the new thermal management sysfs class is built, but doesn't give much information about using it. Using watch, I can see that the cur_state of cooling_device2 changes from 0 to 5 when I check "Dim display when idle" in Power Management Preferences. But I haven't found an applet that changes cooling_device0 or cooling_device1.
Echoing different integers to the cur_state files limits the maximum cpu frequency for cpu0 and cpu1, respectively. This behaviour is expected from what I've read, and mimics the options in Windows power manager for extending battery life by throttling the CPUs. I've had no luck with google and local man pages, so has anybody has seen an applet for controlling /sys/class/thermal/cooling_device[0|1]/cur_state?
On a side note, a value of 1 does slow the CPU down, but it will still hit 100C (normal for an Intel mobile duo core). However, values of 2 and larger throttle enough to lower the maximum CPU temp. Since the CPU temp is a good indicator of power consumption, it's pretty obvious that these two cur_state files are intended to extend battery life. dd_wizard
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Apr 20, 2010
So I've come across several tips to optimize battery life on Linux. [URLs]. In addition to undervolting, I would like to underclock. Is there a way to control CPU speed outside of the BIOS via some software control in Linux... or some sort of boot manager? I would like to boot to linux using underclocked speeds and have Windows running full blast. Is there a way to run Linux completely in RAM? I have read that saves on power consumption from the hard drive.
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Aug 30, 2010
I am wanting to replace the hard drive on my laptop with a Compact Flash Card. I bought a card and a adapter, but I am seeing that there are a lot of downsides to this (e.g. the card is slower, writes should be conserved because of limited write cycles, etc..) plus, in order to change the hard drive in my laptop (ibook g3 clamshell) you literally have to disassemble the entire thing! I mainly wanted to do this project to increase my battery life. However, some people say that it doesn't make much of a difference, while others say it is wonderful. So, to those that have done this mod, how much of a difference did it make for you?
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Aug 8, 2010
I started having this issue two days after installing openSUSE. When I try to boot it on battery (that is, without a energy plug) the laptop just turn off right at the beginning. I have other OS's installed and they are working properly and booting when in battery mode. I haven't got a clue of what I need to check to fix this, can anyone help me out? My laptop is a vostro V13.
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Jul 30, 2010
i just installed Wubi ( ubuntu installer for windows ) and ive got a problem with my wireless. The button on my laptop to turn the wireless on shows that my wireless is turned off ( orange light ) when i try turn it on the light should go blue but it just stays orange like its not turned on.
On ubuntu i looked on the driver folder thing , and theres nothing there at all. Not sure really what to do tbh.. I know my wireless is built in to my laptop and its a broadcom 802.11g network adapter. Its on the same laptop as im writing this on so i need to keep restarting to go on wubi.
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May 1, 2010
i updated to lucid lynx from karmic (i could not get wireless to work on that either) with the hope that wireless might actually work but it doesn't, the keys to turn wifi on don't even work with lucid there is no way to get the wireless to even give me a light that says its on. I have tried installing the rt3090-dkms package and it installed fine (took ages) however that has done nothing at all. It is kind of pointless having a netbook without wireless so anyone got any ideas this is getting very annoying I have yet to use wifi since i bought the netbook
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Jan 26, 2010
I actually pretty much abandoned Ubuntu a few weeks back after several weeks of not getting a couple things working properly.One of the big problems is I couldn't get my line-in audio jack working to save my life (despite working flawlessly in Windows on the same machine).I have posted about this numerous times and had no luck despite many of you good people attempting to assist.Tonight, I put a live CD of Linux Mint in my machine and noticed a few of the little problems I have with Ubuntu seemed to be "fixed" with Linux Mint.
That's when it hit me that perhaps the big difference is 32 vs. 64 bit? My Ubuntu is 64 bit but the Linux Mint I tested is 32. Does anybody think that my audio problem could be as simple as getting away from Ubuntu 64 bit?Also, can anybody tell me if there is a Terminal Services Client available for Mint? I'm sure there is but it didn't seem to be in the default install..
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May 16, 2010
I just installed Ubuntu 10.04 and I can't seem to get the wireless connection to function. Ubuntu either says that the card is turned off or if I toggle the wireless switch on my keyboard it then says 'device not ready.' I'm using a Dell Wireless 1397 WLAN Mini-Card, and it works fine when I boot in Windows 7.
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Sep 8, 2010
I am in a situation at the moment which means I am going to be without an ISp for a week or two, and I can't survive that long without the intenet!!! What's more, I have 8 computers that need to connect, though not necessarily at the same time, but certainly more than one at a time. Anyway, I came up with an idea to buy a Mobile Broadband Dongle, and then share the connection via my PC. Problem is, I don't know how I would go about setting my PC to be a Wireless Access Point/makeshift Wireless Router, and sharing the connection.
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