Fedora :: Low Battery Performance

Jul 2, 2011

I av just started out with fedora (fedora 15 64bit) and everything is dandy except i get less than an hour of battery life on my laptop. I used to get around 2 and half hours on ubuntu natty. could someone help me figure out whats going on?All hardware has been working well and i havent installed any proprietary drivers except the WLAN broadcom driver.

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Ubuntu :: Huge Performance Decrease On Battery Power

Oct 23, 2010

I'm having a huge performance decrease when I'm on Battery Power. Plugged in this thing runs AMAZING, HDMI with HD video, I can run compiz 3d, full desktop advanced effects, HD video from ....., you name it. Just when I pull the cable out it slows down. I tried disabling ATI powerplay but that didnt help.

Is there a way I can toggle the performance, so that I can get "plugged in level performance" even when i'm on battery power? I'm not too bothered about how long the battery lasts. I'm usually always near an outlet.

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Debian Hardware :: Lower Laptop Battery Charging State To Prolong Battery Life

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 reactionsŁ 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 MaintenanceŁ 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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Ubuntu :: Laptop With No Battery - Checking Battery State

May 1, 2010

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?

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Ubuntu :: Ondemand Vs Performance - Increases The Clock Speed To Performance When The CPU Is Under Load

Jul 31, 2010

I just wanted to know if having my laptop set to ondemand, will this affect performance in any way? I realize it increases the clock speed to performance when the CPU is under load, but does the time it take to go from ondemand to performance affect speed? Will there be any noticeable difference between the two setups? I have a dual core intel at 2.2GHz when in performance. When ondemand is set with no load it downclocks to 800Mhz.

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Ubuntu :: "Battery May Be Broken" - Disable The Popup If Battery Has Little Life Left In It?

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

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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Ubuntu :: USB Mouse Battery Indicator That Can Tell The Battery Level Of Logitech USB Mouse?

Jul 13, 2010

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.

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Fedora :: FreeNX Server Performance Under Fedora 14 - Disable OpenGL?

Nov 27, 2010

I'm noticing that the performance for FreeNX Server under Fedora Core 14 is really bad. The screen refreshing is painfully slow. I'm thinking maybe the issue is related to the use of opengl in the X driver? how I can disable opengl entirely, so that the X server is only using 2d rendering?

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Fedora :: Message About Battery Broken?

Nov 23, 2009

I am running gnome Fedora 12 and when I log in I get:'Battery may be brokenYour battery has a very low capacity (16%) , which means that it may be old or broken.'My battery is working fine as I can run my laptop on battery alone. I ran the following commands and got the output:

cat /proc/acpi/battery/BAT0/info
present: yes


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Fedora :: Battery Power Comes Down To 40 - 41 Percent

Mar 18, 2010

I am using Fedora 12. Prior to this I was using Ubuntu 9.10. In Fedora 12, I am facing a problem with battery power. Sometimes when it is fully charged I remove the power cord, battery power comes down to 40%-41%. It never happened with Ubuntu, which gave quite a good battery performance. My question is when it is showing Laptop Battery 100% i.e. fully charged, if I remove the cord why it comes down to 40%-41% (and always in this range).

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Fedora :: GNOME - Battery - Cannot See State ?

Jun 13, 2010

If I click on the battery icon and then click laptop battery nothing happens. Does anyone know the cause? Or even what program controls this so I can run it in a terminal and see what is going on?

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Fedora :: Battery Level On Desktop

Feb 19, 2011

I have installed Fedora 14 LXDE in my netbook (HP 210 mini) and all works fine.I have only one isse, the battery level is not showed in the panel.What I shoud to install or configure to have the battery level on desktop ?

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General :: Fedora Hibernate On Battery Low

Jul 23, 2011

where do I define that my laptop should go hibernate or suspend when my battery has a certain percentage? Where do I define this percentage ?I see no such options under Power Management Preferences.

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Fedora :: CPU Throttling Performance ?

Sep 2, 2009

After being forced to rebuild my computer (failed drive) I finally got current and installed F11 (was using F9). I was watching GKrellm last night and noticed something odd. The CPU frequency on my processor (Phenom 9600) was scaled to the slower speed and was rarely being pushed to full speed.

I verified that cpuspeed was in ondemand mode and ran some processor intense tasks (huge image loads, large file cats, large yum installs, etc...). Only when I was able to sustain near 100% load would the system throttle to the full clock speed. It would then drop back to the slower speed very quickly even though the process was still running. As a rough benchmark, I ran these tasks again in performance mode to see what impact this was having. Most of these tasks were taking as much as 40-50% longer to complete in ondemand mode.

Digging further, I found that the default up_threshold in F11 is set to 95%!! This is verified by cating /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold. This means that the system would not throttle to full speed unless a 95% load was sustained for multiple samples (36 miliseconds each by default).

I overrode these settings in /etc/sysconfig/cpuspeed. I change up_threshold to 60 and down_threshold to 30. I am at work right now, so I can't benchmark this change until tonight. I guess I could have just set it to performance mode and left it, but I'd rather save the power when the machine is idle.

Does anyone have any thoughts on why 95% is the default and if there is any problem/benefit to changing this to a much lower value? It seems that anyone with a CPU running SpeedStep or CoolnQuiet would suffer the same severe performance impacts I saw with the default values.

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Fedora :: Fedora 15 Cut Battery Life In Half

Jun 30, 2011

So I just installed F15 and I really like it. I had to upgradde to kernel version to get my wireless from disconnecting -- aparentlyey it is a bug in kernels 2.6.38.x .Now my problem, and it was also a problem with kernel 2.6.38.x, is that my battery life on my netbook (gateway LT2320, atom n450 @1.6, gma 3150, 1gb ram, 1024x600) is cut by half. I used to get 7-8 hours of battery life, with Crunchbang, Ubuntu, etc., but now i get 4.5 hours.I have read that this is a problem with the current kernels available after 2.6.37.x.

My question is have they found a fix? Are we going to have to wait for 2.6.31? How much longer until that kernel is in the fedora repositories?

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Fedora Networking :: Wireless Gone After Low Battery Shutdown

Dec 30, 2009

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?

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Fedora :: Recently Battery Stopped Charging?

Oct 20, 2010

I have a dell inspiron 2200 that has a pentium dual core and have been running Fedora 13 flawlessly I just noticed recently that my battery wasn't charging. It says battery fully charged at 0.0? And some days can't really recall it charges is there a way to fix this? I am running

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Fedora :: Getting Details About Current State Of Battery

Jun 9, 2011


I have just inserted a new battery. However, there is no settings that show the capacity and current charge time, etc.

When I click the battery icon. All I get is the current percentage.

Is there anything that will give me more details about my battery i.e. capacity, charge rate, time to full charge, etc?

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Fedora Hardware :: Get Battery Power Back Up?

Jul 11, 2011

based distros but never tried it in others. I am wondering if I can complete this guide in Fedora 15. In order for Linux to be my primary OS (Which I'd really like it to be) I need to be able to see how much battery power I have. If all the packages are available how I can download them and what not so that I can get my battery power back up.

Here it is: [URL]

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Fedora :: F11 Low Performance Intel X3100?

Nov 21, 2009

I have a Dell Inspiron 1525 laptop with a X3100 on board. The problem is the performance doesn't really fit my expectations. Compiz works fairly OK, but TuxRacer runs at 25 FPS, Glest runs just terribly slow and there is quite noticeable tearing in videos (MPlayer and Totem). Not to mention 400-600 FPS in glxgears.So far I have only tampered with Xorg (see below, changes marked red).

Section "ServerLayout"
Identifier "X.org Configured"


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Fedora :: AMD Ontario And Graphics Performance

May 8, 2011

Recently I noticed there are on sale, from several manufacturers, some interesting and inexpensive laptops equipped with AMD's new Ontario C50 processor which for one thing seems to use little power (like the Atom), and the other and more interesting is the fact that it has the graphics embedded.

I am curious if someone here owns one of said laptops and can comment about the performance/compatibility of this Ontario chip, because some of these laptops are such good deals that I am seriously considering at least recommending them. Obviously if I purchase one of those I'd install Fedora on in. Two things puzzle me: is performance very far apart from that of a netbook, and second, how do the graphics perform? Do they use the Catalyst driver as well?

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Fedora :: Gnome - Screensaver Will Not Activate On Battery Power

Jul 20, 2009

I have gnome-screensaver on fedora 10 on an intel mac (laptop) under power, screensaver works fine. On battery, the screensaver never activates, it will eventually go to sleep though. I'm kind of new to fedora.

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Fedora :: Laptop Battery Status Not Displayed Correctly - 11

Nov 2, 2009

Recently I installed FC 11 on my laptop. The OS is not displaying the battery status correctly in the notification area. if I remove the power cord after 100 % charging, the status remains the same even during discharging. It never informs me the correct discharge status or any warning when the battery power is critically low. This is causing unexpected shut downs and data loss to me. Is this a bug ? Do we have a solution for this. My laptop is Compaq CQ40-327TU; dual boot with Vista as alternate OS.

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Fedora Hardware :: How Does Battery Power Meter Works?

Mar 26, 2010

How does the Battery Power Meter works.As I know that the APCI is control by software.so my question is the battery connected also to other place on the board and send signal for how much power left.or every motherboard that have APCI "Enabled" can recognize only from the DC power connector how much left. if yes, in what why it recognized.

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Fedora :: Fluxbox Laptop Battery Charge Meter

Jun 24, 2011

I've been tooling around with Fedora with the Fluxbox environment on my old Dell 400SD4 laptop and it works fantastic. I'm still getting a feel for the environment, but one major concern that I had was a battery meter. Being a laptop, it's important to know when I'm almost out of juice. Does anyone have any suggestions for a battery meter for Fluxbox? Preferably one that can be installed through the yum repositories?

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Fedora Networking :: Very Slow Firefox Performance

Dec 26, 2009

I have fedora 12 and since I started using firefox I noticed that it performs very slow. Slow when opening, when displaying information etc..I thought that there was something wrong with my wireless device but I installed opera and it works very fast. The strange thing is that before that I installed google chrome and also worked very slow for me.

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Fedora :: Set Up Linphone For Testing Voip Performance?

Feb 4, 2010

I am trying to set up linphone for testing voip performance. Essentially I am a beginner with linux. I picked Fedora based on the recommendation of a friend. I am running Fedora 12 and I need to get linphone up and running with a working registrar. I have no idea what to do so I turned to hours of research which yielded little results but I did thing to try using partysip. I would like to know if this is a wise choice and if it is what do I do to set it up?

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Fedora :: 13 With Geforce 8400GS - Graphics Performance

Jun 16, 2010

I just did (another) fresh install of FC13. On the last install I attempted to install the nvidia proprietary drivers (tried every guide I could find). When I installed the proprietary drivers, I could no longer boot. It would hang at the end tri-color progress bar. I could ALT+F2 to get to tty2, and deleting the xorg.conf file and init 5 would get me back to the Gnome login. I continued trying other methods, getting such results as a black screen with no way to access tty. I tried using the rescue function from the DVD, but this time I couldn't fix the problem by deleting xorg.conf and executing init 5.

After failing in everything I tried for the proprietary driver, I decided I'd give the new nouveau a shot. Every time I fresh install FC13, the graphics performance is TERRIBLE. Moving a window around or scrolling in Firefox is painfully choppy and borders on unusable. I tried 'yum install mesa-dri-drivers-experimental' but after rebooting the performance was still beyond crappy.

I can get proprietary drivers working in Debian Lenny without breaking a sweat, but I prefer Fedora as a whole by far.

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Fedora :: Slow Performance After A Power Outage

Aug 7, 2010

My computer is running really slow after a power outage. It was fine, then the power went out. Now it's *unabably* slow. The OS takes a long time to load, the simple calculator takes a few minutes to show up, Firefox doesn't even load at all before I give up. And it won't shut down normally. I have to use the power button.

So did the power outage fry somthing on my PC. Do I have ot replace RAM or the processor? Or is it a software issue? Do I have to do something as drastic as a reimage?

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Fedora :: CIFS Bad Performance On File Creation?

Sep 28, 2010

I am experiencing poor performance when using cifs share.Such poor performance occur only in the creation of files on the share but not in the rewrite.This is what i do:

#mount -t cifs -o guest,user=<user> // /mnt/winshare/
# time dd if=/dev/zero of=/mnt/winshare/b.avi bs=1024 count=10000


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