Ubuntu :: How To Protect Hdd From Heavy Load Cycle Count When Using Battery
Oct 25, 2010
I just want to tell laptop users how they can protect their hdd from heavy load cycle count (spin up/down of the hdd) when using battery.If you are not sure then just type this command several times in interval of 1-2 minutes, and you will see how much the hdd head spins down, and up: Code: sudo smartctl --all /dev/sda | grep -i load_cycle.Change /dev/sda with appropriate hdd path for your pc.
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Mar 13, 2010
I installed openbox and pcman on my old desktop and was able take the desktop ram load from 275mb to 120mb. (openbox, pcman, kupfer, gnome-panel) I was so pleased with the increased headroom and performance that I wanted to do it on my macbook. Usually my macbook has as desktop ram load of about 350mb... which I find excessive as that is heavier than OS X. That's running gnome, nautilus, compiz, and gnome-do at startup.
I performed a similar procedure today to create the same setup on my laptop and... strangely, my ram usage on the desktop is still close to 300mb! I've brought up system monitor and added up the ram of all the processes it detected myself and it only added up to about 50mb. How is it that my desktop is still so heavy in a minimal environment?? (both machines are Karmic 9.10, by the way. The desktop is hardwired to the internet while my laptop uses Wicd)
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Oct 24, 2010
i run right now digikam and rebuild my thumbnails. It seems like that this task takes a lot of cpu power and its not digikam itself, rather xorg takes the load. Is this right? I just wonder.
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Oct 26, 2010
I have recently begun contributing to the Folding@Home distributed computing project. Due to oversights in the application's design and to process the most advantageous work units, I need to run this command line app through wine. The application is very CPU/RAM intensive, but it does not put much load on the hard drive. It is multi-threaded and uses up to 100% of all 6 cores in my machine. I run it with a "nice" level of 19 with hopes that it won't slow down my normal desktop use.
Here is the problem... when running this setup, my system will frequently freeze for a fraction of a second and then resume. With the more complicated work units, this can happen 1-2 times per minute. During the freeze, the mouse will stop moving, videos stop playing, music pauses, etc. The system is completely unresponsive. However, each instance only lasts for a very short time. Since this happens so often, my productivity is negatively impacted (and it's very annoying).
I previously ran the native Linux version of F@H without this problem, but that was also processing much less complicated calculations. I have tried with wine 1.2.1 and 1.3.5 with the same results. The application does not have problems running on Windows. It has been suggested that the current Linux CPU scheduler is to blame, but is there anything I can do to resolve this now or work around it?
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Jan 19, 2011
this is with both network manager and WICD, a problem i've had since i got ubuntu - multiple wipes and reinstalls the wifi is supported out of the box, the problem i've randomly run into since installing is, it will randomly stop detecting networks "no networks detected"
i've noticed over time as this as been happening, that it usually happens whenever there is a high load - multiple videos going on multiple tabs, videos queued up etc. its never happened during regular browsing - theres always a lot going on when it happens, almost like it collapses. the only way to fix this, is to quit the manager - shut off the computer (restarting doesnt work) and then it comes back after
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Apr 26, 2009
A while back I decided to use CentOS as my main day to day operating system :) Previously I was mainly using Fedora (old Red Hat <9.x) and occasionally Debian / Debian based distros.Since I am running CentOS on a Dell M1530 laptop I am concerned by the Load Cycle issue that plagues many laptop hard disks due to aggressive default power management. For those of you who are not aware of the Load Cycle issue please refer to the following link from Ubuntu forums which documents it really well:URL...
In Fedora and various other distros I have successfully used Laptop Mode Tools URL... to help set the hard disk APM value meaning the hard disk would stop rapidly increasing the Load Cycle value when running on mains. The setting I choose to use was hdparm -B 254 /dev/sda when the laptop is running off of mains power and set in scripts supplied with the Laptop Mode Tools RPM which will run as a service.
The problem I am having with CentOS is I can't get Laptop Mode Tools to run as a service either from the RPMForge repo (old version) or by installing the latest Fedora version from Laptop Mode Tools site above. I am therefore having to manually set hdparm -B 254 /dev/sda when running which I occasionally forget An error is seen during boot but which changes the CentOS boot to verbose mode but I am unable to locate the error in any of the /var/log files so I can put it in here.Can anyone suggest a way of creating a script suitable for CentOS which will auto apply the above (or other) power saving value for when a laptop is running off of mains power?If anyone can also advise how I can confirm what the error is I can also forward it to the author of Laptop Mode Tools.
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Aug 6, 2011
My LAN has 2 PCs installed, Ubuntu 10.04 and Windows XP. I run the server on Ubuntu, and client on Windows XP. Because I am doing stress test, so the client will keep sending tons of packets to server.
The strange thing is: After few seconds, the client program crash because of insufficient network buffer, the server is still ok. But after that I cant connect Ubuntu PC anymore until I restart it. And I check the router, the led for the Ubuntu PC is always ON (not blinking), look like it is jam already.
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Feb 24, 2010
Is there a way to switch a internal card slot from /dev/mmcblk0** to /dev/sd** ? I'm backing up (via rsync) an ebook directory (1.9gb) to sd card and get massive i/o errors, card turning read-only,etc. This is via a built-in slot on a toshiba laptop. When I use a card reader, the card attaches to /dev/sdd1 and all is fine.
This is a new Sid install. The laptop's card slot worked fine under Ubuntu 9.04 and still works if the amounts of data are small. All I can figure is that the mmcblk device dies under a heavy load...
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May 4, 2009
There is a tool appeared in repository called ktune; The purpose is to adjust some sysctl.conf settings to improve server speed on servers with heavy load. What is this tool for if one can achieve the same with the configuration file added to system startup? Or ktune is just such file?
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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 16, 2011
I just replaced the battery on my motherboard in an older computer that I was going to load Linux on. Before I replaced the battery, I booted up the computer and my old copy of win2k loaded up fine. Now that I have replaced the battery, the BIOS will not load the ROM from my PCI ATA adapters (one SIIG ATA 133 IDE controller, and one Promise ATA 133 IDE controller) which are hooked to my hard drives that I boot from (software raid 1) and the CDROM drive in the system (along with some other hard drives for storage). I removed the adapters and stuck them in another computer to check them. They both loaded their ROM's into the BIOS of the other computer. So the cards are fine. The computer has an award BIOS. I have checked all of the settings and reset the CMOS again, but it will not load the ROMs from the PCI controllers into the BIOS on boot.
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Feb 24, 2010
I have the following perl/DBI script:
Quote:
#!/usr/bin/perl
use DBI;
my ($db, $user, $pw) = ('dbname', '****', '***********');
my $dbh = DBI->connect("DBI:mysql:$db",$user,$pw) or die "Cannot connect to $db: $DBI::errstr
[code].....
The error message is
[Wed Feb 24 13:03:27 2010] myscript.cgi: DBD::mysql::st execute failed: Column count doesn't match value count at row 1 at myscript.cgi. [Wed Feb 24 13:03:27 2010] myscript.cgi: DBI::db=HASH(0x8a30c60)->errstr
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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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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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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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May 24, 2011
I just updated to 11.04, and noticed in the "Background" tab of the appearance app, that there was what looked like a default option to cycle a set of backgrounds. However, when I selected it, the only background that appeared was the first one in the series, and it never cycled.
1) Is cycling backgrounds possible?
2) If so, can I create my own series of them?
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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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Mar 23, 2010
I have recently been unable to boot into windows xp, which is on a drive separate from my linux installation. When I select the windows installation, the computer starts back at the bios screen and returns to grub endlessly. I am running an updated 9.10. The linux will boot fine; however the most recent kernel does not show up on the list of available options, which may indicate something. I have searched the forum and found nothing that helps. There are plenty of posts asking if you have stopped using windows altogether and other non tech related posts though.
The results of sudo fdisk -l are below:
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May 26, 2010
I just upgraded from 9.10 to 10.04.Now, when I boot up, I encounter an error in the boot cycle "An error occurred while mounting /media/cdrom0" "Press S to skip mounting or M for manual recovery"Pressing S does work to get me through the cycle and does not affect CD-ROM use once the OS loads. How would I find out what is causing the error or is there a safe way to stop it from trying to mount a drive with no media in it?Quote:GNU nano 2.2.2 File: /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point> <type> <options> <dump> <pass>
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Aug 29, 2010
I have Unbuntu 10.4 installed on a netbook. It is the only OS installed so no GRUB menu.
It hibernated last night, and now when I try to boot it hits the initial few steps in the boot process and then reboots.
Any thoughts on how to fix this problem. I have tried to access a GRUB menu w/ the ESC key but no dice.
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Aug 31, 2010
i updated the compiz fusion plugins and decided to try some out, and when i tried the reflected windows, it logged me out and i had to log back in. but now as long as it's active, i can't login long enough for me to disable it, Edit: nvm, i managed to fix it. login under Failsafe GNOME session, and it'll be in safe mode, with all add-ons disabled, so you can manually turn them off
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Oct 31, 2010
I'm running Ubuntu 10.10 on an Acer Aspire 5530G. On a fresh install, the HDD is silent after logging in and the desktop is immediately ready for use. A few days and updates later, after every login, there's heavy HDD activity that lasts about 20/30 seconds and makes it almost impossible to perform any other task. The entire desktop is visible during said event.
Not a big issue, however it bothers me a little. I've observed this behavior since Ubuntu 9.10. Anyone else experiencing similar problem?
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May 26, 2011
It always seems to me that Mac programs use far more resources compared to gnu/linux and windows. for example the mac version of Firefox is 27MBs while the windows version is only 12. Also system requirements for programs often require far more ram for mac than they do for linux of windows. Is this just because they are poorly written? obviously, the mac version of firefox is just as good as the windows version. but if it's heavier, and does the same stuff, then it's worse, right? This probably has something to do with stupid formatting stuff.
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Jun 5, 2011
so I've scoured the web and I can't seem to find anyone else having this issue. The issue:
Whenever my box is heavily using the internet, it seems to just wimp out. It shuts off and reboots.
When it's happened:I first deduced the connection to the network connection when I was trying to set up the system. When I tried an upgrade after the first time I installed the system, it crashed, leaving me with broken packages and all kinds of mess. So I decided to start over, and since I then had the network set up, I used the install latest version feature in the installer. If failed again. I battled issue this a couple of times before I opted to do updates in chunks instead of all at once. Success. Then I tried to download an entire website. You see, I had bought the computer to use as a test server for work. I ran wget, I believe. After a lot of recursive downloading, it decided to take another unauthorized break.
Now, I've got a minecraft server running too. It's been working pretty nicely, until lately. I've got a cron job set up to backup the server files with dropbox. Bad, bad, bad. The computer started acting up again, shutting off and rebooting. I figured it was having a hard time uploading to dropbox while simultaneously serving up the game. I moved the cron job from hourly to daily, and haven't had issues all day. Great. Until late tonight. It did it again while we were playing. It's relentless. So I went through the whole process of assessing damage. Luckily no damage. Then I went ahead and ran the dropbox script that didn't get to run while I was performing diagnostics.
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Nov 7, 2010
I've got the galaxy live wallpaper but I'm wondering if anyone know's of other ones? like the one that changes by a night day cycle?
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Jan 26, 2011
When I boot one of my machines, it gets as far as GRUB, then proceeds to a blank screen for a second, and then repeats the cycle all over again - ad infinitum. I have tried previous kernels on the list with the same results Also, I cant boot into recovery mode either.
I have run Memtest successfully from the GRUB options and no errors appear in the results. I have tried booting from a Live CD and here I get as far as the "OS choosing screen". When I then select one and hit Enter, the screen goes blank and the machine reboots as before.
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Jun 30, 2011
I've set all the wallpapers I want to cycle, I've set the time to 15 sec checked the "Cycle" box but nothing happens. The background stays the same. Log in-out didn't work. I'm on Ubuntu Classic
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Jan 27, 2010
Is the PID of a process changes during it�s life cycle in linux ?Or it�s PID is fixed throughout of process�s life cycle.
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Aug 12, 2010
The login cycles- I already have a problem with mounting something connected with USB (long term minor annoyance, but everything works), but suddenly I cannot log in. When I put my username and password in, the screen flashes black for about half a second, then the login screen re-appears. If I put the wrong password in, I get an authentication error message (as expected) without turning black and then cycling again.
I have no problems going into terminal mode and logging in. I've tried all sorts of suggestions related to this problem- reinstalling ubuntu-desktop, apt-get clean, sudo startx, and the last indicates that x-windows is already running. I've found a couple more things to try, but I'm not too sure how well they'll work. It seems to be connected with x-windows, but I don't know what is causing it. Last night I had a big problem that required reinstalling nautilus (couldn't set up a connection to a remote server), and that problem was fixed- but this developed when I booted this morning.
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Jul 21, 2010
I'm looking for a browser than can handle heavy java usage. Firefox doesn't seem to be able to handle heavy usage anymore . Chromium does a decent job, but its just so different from Firefox I just can't get used to it. I have been trying to get used to chromium for over 2 weeks but can't because of the huge difference. So what other browsers can handle heavy java usage? On windows kmeleon was my go to browser to give you an idea of the browsers that I like.
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