Low battery time with Arch

Hi,
I'm running Arch on an Asus UX32LN and I've noticed that since my installation of Arch, my battery time has been reduced by 2-3 hours compared to when I was running Windows 8.1. What's the cause of this? Can I diagnose it somehow? I've lowered my screen brightness, I'm not using the graphics card or anything, running just a WM and no extras. This is just me sitting with chromium and a terminal open at most.
Any ideas?

clfarron4 wrote:
Median wrote:I used powertop and noticed that Chromium was draining my battery life quite well, other than that I guess it's the screen brightness. Still feels to me that Windows had better optimization from the start, but I will look into how I can optimize even more, if none has any tips.
Are you using BumbleBee to manage the nVidia card? Or have you disabled one of the cards from the BIOS/UEFI settings?
No.

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Iphone 5 low battery settings with wifi

Are there any special Iphone 5 low battery settings with wifi? Today I was using my iphone and the wifi magically turned off by itself. I figured it was just having trouble finding the wifi so I went to my settings to see what was going on. Somehow it turned itself off. I'm guessing this is because I had a low battery. I just got the battery message saying my phone had reached 20% battery a few minutes before that happened. Has this ever happened to anyone before?

mattatl wrote:
Has this ever happened to anyone before?
Yes, and you would have had that answer had you bothered to search this forum before posting.
Basics from the manual are restart, reset, restore from backup, restore as new.

Zen Micro Photo Low Battery Warning With Fully Charged Batt

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What was the resolution. I am having the exact problem.

First time with Arch, minimal build: little niggles [solved]

Ok, I've been using *Buntu based Distros for a while now, this is my first time taking the plunge with Arch - chosen because it is a build in what you want distro.
I've wanted a minimal build install for a printserver project, this week I took the plunge with an old laptop.
I have it doing the printserver part, but there are some minor niggles. Let me detail what I have installed and what I want it to be able to do, before I detail these.
Arch Base install with:
CUPS
LXDE
Leafpad
Xorg Intel video drivers.
smartmontools
firefox
WPA_Supplicant,as this system is to be a wireless printserver.
What I want this system to do:
Run most of the time in shell, no DE running. (This keeps it cool and quiet, as it is in a bedroom)
Only run the DE when startx is called, and have the DE able to be shut down without restarting the server.
serve printjobs from the moment it boots and connects to the wireless.
What it currently does.
Boot up, wait for login
When login, require WPA_supplicant, dhcpcd and Cupsd to be initialised before it can serve printjobs.
If DE is required, Xorg must be started in tty1, startlxde ran in tty2, and then manually switch to tty7 for the DE.=
I have a script to call when i login which starts WPA_Supplicant, dhcpcd, and cupsd in that order.
I would really like the interface to have a staticip but i dont know how to do that without the handy graphical tools that ubuntu provides.
Please can you help, at least point me in the right direction with these niggles? I have learned a lot about what is required to get a basic DE up and running, and im sure with your help I will learn more.
Last edited by Rhiadratech (2011-05-20 23:07:52)

Ok, so I've gotten Cups and wicd autostarting, set the static ip from my router because else it wasnt getting DNS etc details and left it asking for that by dhcp.
Still having issues with the DE
pedro_sland wrote:
If DE is required, Xorg must be started in tty1, startlxde ran in tty2, and then manually switch to tty7 for the DE.
I run xfce4 sometimes. I just run startxfce4 and it starts Xorg and displays the DE. I think that startx runs twm which you probably don't want so you might want to take a look at that. startx has a script it runs somewhere (I forget where but the wiki will know). When I'm done with xfce I just log out and it exits.
For me, this isnt working. startlxde on its own just goes to
[root@yomiko ~]#
in tty1, and leaves me with a blank screen when i switch to tty7
I literally must call Xorg in one tty, startlxde in another and then manually shift to tty7 to see it.
startx itself:
-bash: startx: command not found
Even Xorg isnt happy being called on its own, that too goes to a blank screen, though it does at least switch to tty7
With Xorg called in tty1, when i call startlxde in tty2 i get dbug errors from pcmanfm though these seem to be just it informing its detected the HDD partitions.
there is a grumble early on in the process, before the debug errors, saying:
Importing pynotify failed, notifications disabled.
Finally, I did add the line to .xinitrc the LXDE page in the wiki said to to allow startx to run:
exec ck-launch-session startlxde
This is the only line in this file.
Currently running as root... I'm not going to complicate matters by adding a user until im sure i got it all running as root, bad practice or not!
Edit: A friend helped me solve it.
The package xorg-xinit held the startx script that was missing. I now get LXDE when i want and only when I want.
Last edited by Rhiadratech (2011-05-20 23:09:16)

Ipod Freezes up and low battery time

Well My ipod has been freezing up lately and the battery time does't go on for the 8 hours after being charged fully. I was wondering if i would be able to send it in to get fixed.

Evan,
Try to reset your iPod and see if it helps your battery and freezing up.
Press and hold the MENU + CENTER buttons - at the same time - until you see the Apple logo. You want to do this while your iPod is connected to your computer and you might have to try more than once.
*Born2Die06*

Low Battery time after Mountain Lion Update

I would like to know why the Mountain Lion uses more energy... because i realized that my MBP 2011 is using more battery... before I updated it, it usually take 5 or 6 hours to be empty and now it is taking 3 or 4 hours on it's better time... =x is there something wrong with the SO?

There's a huge thread about battery life here: https://discussions.apple.com/thread/4135250?start=0&tstart=0 . Hopefully it will be fully addressed in 10.8.2.

Short battery time on Arch.

I've a Samsung NP-300E4Z, and i felt like i made a wrong choice.
When I used windows on this samsung, for about 3-4 hours, the battery gauge was a quater (or sometime half) out of full.
When I used linux on this samsung, for about 3-4 hours, it flatted out (0%).
Here's my lspci, if it's usefull:
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200/2nd Generation Core Processor Family PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 (rev b4)
00:1c.3 PCI bridge: Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 (rev b4)
00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM65 Express Chipset Family LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller (rev 04)
00:1f.3 SMBus: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller (rev 04)
01:00.0 3D controller: NVIDIA Corporation GF119M [GeForce GT 520MX] (rev a1)
02:00.0 Network controller: Intel Corporation Centrino Wireless-N 130 (rev 34)
03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168 PCI Express Gigabit Ethernet controller (rev 06)
If you want to know more about this computer, please kindly ask...

Otherwise, if you can figure out if there is a way to simply turn off the nvidia card when you use Linux (if you don't want to utilize it in Linux that is), then that is an option as well. I have an Intel based Thinkpad with only the HD4000 integrated processor, and the battery life I get on this machine actually exceeds what I have been told I should expect with windows.
If you take the nvidia graphics card out of the picture, you still are working with Linux, and you have an operating system that is strictly a DIY setup. So although a vanilla kernel and the base packages provide some very sane defaults, it is certainly not a set of defaults that optimizes for power conservation. A really good place to start is by using powertop to see what kinds of power draw you are actually getting and what kinds of things are the most power hungry in your machine.
There are many optimizations you can make within /sys and through options when kernel modules are loaded that can bring about much better battery conservation. So on the last section of powertop (tab over a few times) you will see a bunch of things marked "good" and "bad". You need to check all the bad things and figure out what settings and tools yuo can use to make those say "good". As an example, the ethernet card's wake on lan functionality being on will report a "bad". So I have a udev rule that, upon detecting the presence of the device, will run ethtool and turn off that functionality. I also have configuration files in /etc/modprobe.d that ensure that certain modules are loaded with power saving options turned on.
There is a wiki page that outlines most of the things that can be done to optimize these things.

Ipod won't turn on. When plugged in to computer or the wall it shows the apple logo for a few seconds and then turns off to the low battery symbol with a weird symbol underneath. why? how can i fix this?

Help

Hey brittlynnxo,
Thanks for the question. The following resource provides information for a device that is not responding or turning on:
iOS: Not responding or does not turn on - Apple Support
http://support.apple.com/HT201412
Thanks,
Matt M.

Battery time and enhancement features

Smartphone’s are known for consuming a lot of battery power and depending on your configuration your phone might last longer or shorter than other phones. This topic contains some advice and info about what you can do to increase your battery time.
When using your new Android phone it will take approximately up to a week or so before the phone settles in its battery usage and power management, depending on applications installed and the amount of content in your phone. It’s worth mentioning that this evaluation that the phone runs in the background at first period of use will happen again after master reset or reinstalling/repairing the phone software. So if you have just reset or reinstalled your phone, this power management evaluation process will run again. So it might at first seem like your phone is consuming more battery power than before the reset, but its normal.
If you have been using your phone for a couple of week and still think that the battery time is a bit too low, here’s some advice that will increase the battery time.
First of all make sure that your phone is running on the latest version of the firmware. You can use PC Companion to check for software updates for your phone.
http://www.sonymobile.com/gb/tools/pc-companion/
Or Bridge for Mac if you’re a Mac user:
http://www.sonymobile.com/gb/tools/bridge-for-mac/
You can also check battery consumption via the menu; Settings > About phone > Battery use, or Settings > Battery, or Settings > Power management > Battery.
Things that can be disabled or reduced when you don't need them:
Dim the screen
Disable live wallpaper if used
Turn off 3G (WCDMA), 4G (LTE).
Turn off mobile data traffic
Turn off Bluetooth®
Turn off Wi-Fi®
Turn off GPS
By doing this you will increase your battery time. But if you're still experiencing a low battery time you can try the following as proposed by many users on the forum. (Only applies for phones using removable battery)
When phone reaches 50% in battery level turn it off and pick out the battery for a few minutes. Put it back and connect the charger, now charge the phone turned off for about 5 hours or overnight. Start the phone as normal and check if the battery life time has improved.
You can also let the phone drain the battery completely until it turns itself on and won’t start again.
At this point connect the charger but do not turn on the phone, leave it charging while turned off until the battery indicator on the screen is completely filled.
Also make sure that you’re using a Sony original charger.
Battery enhancement features
Extended standby mode
Use the extended standby mode to make the battery last longer. Your Wi-Fi® connection, data traffic and unused applications are then paused when the phone is in standby. You can still receive phone calls, text and multimedia messages. Once the phone is used again, all paused functions are resumed.
You can enable/disable Extended standby mode via Settings > Power management. (Depending on model)
STAMINA mode
It has already been mentioned a couple of times that Smartphone’s use a lot of power, even when you’re not actively using them. All those app’s that you have on your phone may still be running in the background, draining your battery. STAMINA mode is a further development of Extended standby mode and saves wasted battery drain by recognizing when your display is off and turning off functions you don’t need, while keeping the notifications you want. As soon as you wake up your Android Smartphone, everything is up and running again.
Get only the important notices.
With Battery STAMINA mode, Wi-Fi® and data traffic are disabled during standby, but you still receive incoming calls, texts, and alarms. And since everyone has different needs, you can easily customize which app's you want to receive push notifications from even in standby mode. Facebook notifications on or off? It’s up to you.
The STAMINA mode will constantly re-evaluate your usage and update the expected standby time accordingly.
This standby time will completely vary depending on your own personal usage. You may see that when you first start using your handset, the Standby time will be higher than what is expected after you have used the handset for a few days. This is due to STAMINA mode having no previous usage history to estimate from.
If you have a very high usage level, you may only see a slight improvement between having STAMINA enabled and disabled. STAMINA mode is more effective the more often the display is turned off as this is when the power saving features kick in. If the display is rarely turned off, you may not see much improvement in the battery performance.
You can enable/disable STAMINA standby mode via Settings > Power management. (Depending on model)
- Community Manager Sony Xperia Support Forum
If you're new to our forums make sure that you have read our Discussion guidelines.
If you want to get in touch with the local support team for your country please visit our contact page.

To turn sound off (and on) try holding the lowest right button (#) for a bit longer time. Works with most phones.

Audible or vibrating low battery alarm

is there any way to ask Apple that sets the low battery warning with an audible or vivrating alarm?

This is the iphone forum.
However, let your computer run until the computer puts itself to sleep. Then plug it in and charge full as per instructions.

My iphone won't switch on. I've tried holding the power and home button more than 30 seconds up to a few minutes but it didn't switch on and went straight to recovery mode. It died of a low battery and i already fully charged it i checked with my itunes.

i really need help here. I have only used my iphone for a month. my iphone won't switch on. it died of a low battery and i've already fully charged it and usually before it even fully charged, it will turn back on right but in my case nothing happened. i've tried holding the power and home button for 30 seconds and up to 2-3 minutes but no logo appear. it went straight to recovery mode. there's nothing wrong with my cable, i checked with itunes and this happened once a week ago but it did switch back on after i tried a few times but now it just won't switch on. i also have problems with my screen as there's some noises to the screen (i hope you get me) and when i turned the camera on, it was as if the whole screen is shaking. i'm currently studying in the middle east and there's no apple store here so i cannot use my warranty. i will only be back home in summer. please help me what should i do to at least switch my iphone on first.

I did a little bit of experimenting. I have an iPad original versions myself. I took it out of the box knowing that I haven used it in months and I expected the battery to be dead and sure enough the battery was as dead as I imagined it would be. For the first 30 minutes I experienced exactly what you are experiencing, but then the iPad suddenly powered up on its own (like it does when plugged into the charger) and I am using it now to type this response to you.
My point is that I am starting tothink that your battery has suddenly died on you for some reason or you have a hardware problem now. I would still try leaving the iPad charge for a while longer - maybe even overnight - and then try again in the morning. Unplug the iPad and try resetting with the home and sleep buttons. Try plugging the iPad in again. Unplug it, try restarting again. Let it charge for a while again.
After trying something like that, if it still will not start up, then I think it's time for a trip to an Apple Store and see what the Apple Techs think.

Kernel Panic at low battery with MacBook bug found - with solution

Hello All,
I think I've found a bug with Leopard concerning laptops. I started a thread which I'll link to below.
http://discussions.apple.com/thread.jspa?threadID=1219413
Other people have had this same issue - I've seen it on a few different posts. Does anyone know the best way to contact Apple regarding this? I don't know how active they are in reading this forum, and I want to make sure they know about this, as it's probably something that can be fixed with an OS update.
To summarize, I'm including a couple of key posts:
Posted Nov 4th 2007...
Hello,
I just got one of the new November 07 MacBooks. The machine is great, and screams with the pre-installed Leopard.
First thing I did was plug it in to charge as I started configuring software. Once it was fully charged, I pulled the plug, and began using it on battery. My plan was to calibrate the battery, by running it all the way until it forced a sleep, then shutting down and plugging it in again, as Apple recommends.
Problem is, I never got the "Low Battery" warning, or even the sleep warning. At around 10 minutes of power left, I simply got a kernel panic. A few seconds later, the laptop just switched off.
I plugged in again for a few minutes, then ran it down again to see if I could reproduce the error, and I did get the low battery warning.
The next time the battery ran down, it gave me the kernel panic.
Is this happening to anyone else? Is it a new MacBook problem, or a leopard power management problem? I'm having no other issues at all with the MacBook or Leopard. Any help would be appreciated.
Thanks!
Nov 12th, 2007...
Well, It's been a few cycles since the first one, and all is well. I'm getting the low battery warning when it runs low, and no kernel panics (knocking on all available wood). If I start having problems in the future, I'll update this thread, but for now I'm marking it answered. It was probably Leopard not reading the uncalibrated battery correctly.
Dec, 31st 2007.....
Hello all,
Short followup here: I've have 30 successful cycles after the first couple of kernel panics, and it's time to calibrate the battery again. I tried to do it yesterday - charged the battery all the way, used the macbook while plugged in for two hours, unplugged the adapter and continued to use it until I got the low battery warning. I shut down everything and let it sit - waiting for it to go to sleep. Instead, I got a kernel panic, and the computer shut down. It would not restart until I plugged it in, but I know there was some battery left, since it panicked at 2% battery. I let it charge for an hour or so, then used it again until I got the low battery warning. This time, it went down to 0%, but panicked and shut down instead of going to sleep.
I'm trying this again, after charging all the way last night, and just leaving it on to drain. I'm at 20% right now, and I'll post to let you know what happened.
Dec 31st, 2007....
Hello All - I think I've figured this out. Looks like a software bug with Leopard.
I did get another kernel panic just now at 0%, after the low battery warning. But then I had a revelation. In trying to calibrate the battery, I had set my energy saver settings to never sleep under the battery settings - so I could leave the notebook overnight to drain. I gave it a bit of a charge, then set the battery setting (in energy saver) to sleep after 20 minutes. I restarted, used the computer for a while, got the low battery warning, the computer went down to 0%, then went to sleep as it should.
I believe that since I had the computer set to "never" go to sleep, Leopard didn't know how to handle it when the battery ran down, and kernel panicked. Perhaps this happens on new MacBooks, because these settings aren't written yet? Regardless, it's obviously an OS level bug here.
For those having the problem, make sure your battery settings under energy saver are set to allow sleep after a time.

Start here:
_http://www.apple.com/feedback/macbook.html_
Joe

Used wrong charger with ipod classic, now it wont turn on, displays the low battery icon even though its connected to the wright adapter

used wrong charger with ipod classic, now it wont turn on, displays the low battery icon even though its connected to the wright adapter.
Can anyone help ?
please?

WHow long have you left it to charge? Have you tried resetting it after a short period of time to see if that can help jumpstart the charging process? To do this, press and hold both the Select/Center and Menu buttons together long enough for the Apple logo to appear.
B-rock

Low battery life, heat or noise with Macbook pro? SOLUTION HERE

Low Battery?
Warm unit on Idle?
Loud fan?
Likely solution is here..
I have a new 15" and had these issues, found the only working solution in the thread below, safe and easy to use. If you are worried do a
time machine backup before doing this.
Go here
https://discussions.apple.com/thread/3191543?start=0&tstart=0
Read post #2, put the command into your Terminal (Found inside launchpad)
- That command is the following "sudo launchctl unload -w /Library/LaunchDaemons/com.citrix.agadminservice.plist"
type password when asked ( you wont see any characters but it will be accepted when pressing enter)
Restart, battery, heat and noise issue is completely solved, lion is fixed.
You now have a very high quality product, that functions like it should. Macbook Pro still owns.
Hope this helps everyone out.

Same problem with shortened battery life here with 10.6.2 (2009 unibody 15" MBP 2.53 GHz.) Shutting down and removing the battery seems to have brought fully charged battery life back from less than 2 hours to over 5 again. Didn't bother holding down the power button with the battery out though.
A few notes:
1. Prior to the shut down + battery removal, I had noticed unusual warmth despite the CPU being only lightly loaded. Activity monitor showed no app using more than 4% of the CPU, with just a few apps running (Safari, Mail, iCal, Finder).
2. Months ago, just a PRAM reset seemed to fix the problem, possibly with 10.6.1 or 10.6. Can't remember for sure. But PRAM reset doesn't help any more with 10.6.2.
3. I have never reset the SMC.
4. I don't recall this problem happening with any of the 10.5 releases. Just with 10.6.x.
5. The bottom of the MBP's enclosure is cool again after the shutdown + battery removal.
6. I am also running 10.6.2 on a 2008 aluminum iMac (20" 2.4 GHz) and haven't noticed any unusual temperatures, but it's much harder to tell. And of course, there's no battery life to measure.
I'll see if the problem returns again, but it really seems like a Mac OS X problem instead of a firmware or runaway app problem. Maybe some daemon is stuck in a busywait loop or something?

Battery shows incorrect time and no notification on low battery

Hi everyone,
I have just purchased a new battery, of course its not an original one. The problem is that my battery meter shows the percentage incorrectly. Like it says 42% remaining, but suddenly my laptop got in to hibernation (as i set the action to perform upon low battery level reaches). Now what can be the issue? As the battery new and its working fine, i mean its giving me backup of 2+ hours. Oh, and my laptop is DV6-2157wm with Windows 7 Home Editions (64-bit).
Waiting for your kind suggestions and tips.
Take care,
Regards
Fahad Ali

Please have a look here.
http://windows.microsoft.com/en-us/windows-vista/Battery-meter-frequently-asked-questions
Why does the time remaining on the battery meter change drastically sometimes?
Battery life depends primarily on two things: what you do on the mobile PC while it's running on battery power, and the power plan settings that control the computer's use of power. The mobile PC's power consumption varies constantly, depending on your particular activity and how long you spend on that activity. For instance, watching a DVD consumes considerably more battery power than reading and writing e-mail. For these reasons, the battery meter often lags in reporting the charge and the estimated time remaining.
hence battery meter is never so accurate. older the battery, chances are more of sudden drop.
Regards,
WW
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Low battery time with Arch

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