I just noticed this issue today but when I unplug my laptop from its adapter, the battery loses 44% of its battery immediately, Is there any way of solving this?
View 1 RepliesAs soon as i'm starting to copy a large file enough file (>700Mb) to my ubuntu box (connected to an Asus router via wifi) from a Windows 7 client (connected to router via ethernet cable) i get a dramatic drop in speed. upload starts at 1,0Mb/sec with a ping to ubuntu box at <1ms, and in 2 minutes it drops to 200kb/sec with a ping of over 1000ms! The ping increases with every second in a linear progression.
To exlude router as a possible problem copying to a windows 7 notebook connected to router via wifi results in an average of 2,7Mb/sec with an average ping of 150ms.
MB Model: Asus P5B Deluxe wifi
OS: Ubuntu Server 9.10 + desktop installed
Wifi configured via GUI
2. lsusb
3. wlan0
4. lsmod
I'm writing a script based on dialog and one of it's functions is to perform a restore with dd, of which I would like to show the progress by means of the "gauge" option of the "dialog" utility. I wanted to do this by sending a USR1 signal from time to time to the dd PID, because this results into the amount of bytes already being dd-ed ont the console screen. A simple calculation based on the orginal size would result into a percentage that can be fed to the gauge function of dialog.
The challenge I'm facing now is to launch an external script (I guess with "&" to send it to the background) that sends, let's say every 5 seconds a USR1 signal to the dd PID. That would be no problem, but how do I capture the output of this "kill -USR1" to the original script? I tested this and the output is not sent to standard ouput, so it must be that it is sent to standard error. For now I don't see a way out.
gauge when the server is getting overloaded with users. At present I run the server mainly as a proxy server with about 100 users. The bandwidth at the data centre is 100Mbps connection with total bandwidth used last month = 17431.16 MB I would like to add a VPN in future but feel that this might overload the bandwidth as instead of it just being web traffic it will the entire client TCP connections. I would like to monitor this before it gets to the stage where users are complaining but not sure how to gauge whether the proxy is being overloaded. It is used mainly for video traffic.
View 11 Replies View RelatedJust 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.
When my Western Digital MyBook is plugged into my desktop machine via usb everything works fine. The computer boots up normally to the dual boot screen, and all OS options will boot up normally. However, if I unplug the external hdd (whether that be when the computer is off, or I unmount it and then restart) before I get to the dual boot screen I get an error message informing me that I have incorrect boot media, and to insert and hit any key. Some background: I have checked the bios and it is set up to boot from the internal sata hdd as the first boot device, and there are no usb boot devices defined. Prior to making this a dual boot machine, it ran windows only, and had no issues booting when the external hdd was unplugged.
View 9 Replies View RelatedI have got rid of windows 7 of my laptop and installed Ubuntu 10.10. So for the past week or so have done a lot o testing and stuff. Laptop I have is hp pavilion tx 2000 model tx 2130ea. Problem I have is laptop wont boot when unplugged but boots when plugged in. When it starts up you can hear the logo music but screen remains black. Now I have found what the problem is after hours of fault finding. Ubuntu detects the additional drivers to download wireless driver etc., and a couple of nvidia 2d/3d drivers so its when one these nvidia drivers are installed is what causes the problem when booting up unplugged. No problem when plugged in. At the moment I just have not installed these nividia drivers and all is good. Graphics Card Nvidia Geforce Go 6150.
View 7 Replies View RelatedSo basically, as rookie as it sounds, I spent about 3 days trying to figure out why my computer wouldn't boot (BIOS not found, then it ran grub rescue) until I saw that my external hard drive (which evidently somehow has some file on) was unplugged. I am running windows and ubuntu 10.4 on partitions on my computer's internal 120gb drive. The problem I have is that during these 3 days, I re-installed ubuntu on the drive from the CD- so I think I have 3 partitions, even though the 3rd does not show up as an option to boot into from startup.
What it does show though, is on my desktop I have 2 mounted drives:
One 52gb one that has my Windows files in it, and one 44gb one that has ubuntu files in it, but NOT the ones I use- this is the rogue copy I installed by "accident". I checked this by looking through the contents and it was all minimal (nothing in home folder).
How do I "remove" this partition safely, and return to having just a windows an ubuntu partition?
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've been asked to look at a system which is running slowly. It's running hardy on an intel Q9400 quad core CPU system which should be a pretty fast machine.
The most obvious symptom of this problem is that the terminal takes about 10 seconds to open instead of the usual fraction of a second.
What I've discovered so far is that the system has 2 network ports one configured to access the LAN and the other to connect directly to another piece of hardware using a different subnet. If the LAN is not connected the system runs slowly and if it is connected it runs at normal speed. It also makes no difference whether or not the second network port is connected.
I've looked at the system monitor and can see no abnormal network traffic or processes using a lot of CPU resources.
I have some years experience of linux & programming, but I don't really know whats "under the hood" in a PC. I decided to learn. I have two hard drive disks in one of my computers, so I decided to see if I could run it with only one. I removed the voltage from one of the hard drive disks and when I booted, of course the cumputer gave me the message: "Disk failure, insert system disk and restart". When I reconnected the HDD in my computer and booted once again, I got the same message.
This brings me to my first question: Why can't I start my computer as usual after unplugging and replugging one of my two hard drive disks? All cables remains the same, what has changed? The first question remained unanswered and I tried to install a OS on one of the HDDs when the other was disconnected. This worked fine and I set up a windows/debian dual boot. Perfect! But after reconnecting the disconnected HDD I tried to do the same thing (so I would install a new version of the system I started out with, a windows/debian dual boot). I formatted and installed windows on one of my HDDs again. It was bootable.
When I installed debian and let the installer set up Grub, I got the message "Missing operating system" when booting. I tried to install only linux (without windows) and I reached the same resault: after unplugging and replugging one of my 2 HDDs I can no longer boot a debian operating system, though the installation runs without a problem. What has happened? What do I need to do to be able to install a working debian system on this computer? (installing windows works fine) Has the settings of my BIOS changed when I unplugged?
I installed ubuntu 10.10 and it seems everytime I unplug my laptop it freezes and the caps lock flashes. This happens pretty much every time. I installed fedora 14 had no problem with unplugging the charger but I didn't like it and couldn't get WiFi working right. So I installed ubuntu 10.10 hoping it would be gone and I have the same problem again. I have a AMD Athlon II Dual-Core Processor M300
(32-bit)
3GB DDR2 memory
320GB HDD (5400rpm)
My Fedora 15 is not boot properly when ethernet is unplugged.It is kind of blocked and the moment I plug in the ethernet, it work fine.I have attached the /var/log/messages, there is time gap of 1 min 30 sec, that is when i plugged in the ethernet.Can i anyone tell which service is blocking exactly.
View 10 Replies View RelatedI ended up inheriting an IBM Intellistation Z Pro desktop with Red Hat 2.6.9-78.0.17.EL, that used to be part of a company network (hard IP, domain, etc). I'm trying to boot and connect to my home internet provider.With or without ethernet cable connected, the boot process seems to timeout on a number of steps (system logger, NFS Statd, automount5) and eventually get's stuck in NFS quotas.I started looking at /etc (in single user mode) and of course there are a bunch of files (hosts, resolv.conf, etc) with hard IPs, domains, etc.My questions are:- how hard is to change network setting to use soft IP and be able to connect to my provider
View 3 Replies View RelatedI accidentally unplugged my usb drive before unmounting it. In windows this is no big deal, so I'm used to that. However, I'm finding that in Kubuntu 10.04 this is a big deal. Now I can't mount any other drives unless I use the command line. Also, I can't unmount anything, even if I mount it on the command line.
What do i do? I know a reboot will fix this, but if it happens again i will be right back at this point. It should not take a full reboot just to unmount a drive. I have tried umount -l and umount -f and the terminal window just hangs.
I received a new Cyberpower CP1000PFCLCD UPS today. I let it charge for about 6 hours.My server is a former desktop PC with the following specs:MSI MotherboardAMD Athlon XP 2000+ CPU768 MB DDR RAMDual 80 GB HDD running RAID 1 (Disk Mirroring)After shutting the server, router, and backup drive down and plugging in the UPS, I did the UNPLUG test where you unplug the UPS to see if everything stays on.My Router and Backup disk both stayed powered on, but the Server immediately rebooted.Does anybody have any ideas how I can fix the server rebooting problem? It should be staying on just as everything else.
View 5 Replies View RelatedI formatted the USB flash drive using Karmic's Format Disk utility (right-click on a volume, select "Format..."), and selected "Encrypted, compatible with Linux (FAT)" from the "Type" drop-down menu.It mounts correctly when I plug it in, and I can access the files just fine.When I unplug the Flash drive without using the 'Safely Remove Drive' option, the icon on my desktop changes its name to '2.0 GB Encrypted', instead of disappearing and unmounting like my unencrypted Flash drives do.
I would like to have encrypted Flash drive treated in the same way as my unencrypted Flash drives, which disappear and unmount when unplugged, even if the 'Remove Safely' menu option isn't used. What can I do to accomplish this?NOTES:When I plug the encrypted Flash drive in, the following line shows up in the output of 'mount'. 'secure' is the name I gave the disk during the format process:
Code:
/dev/mapper/devkit-disks-luks-uuid-302db16c-c6e2-4dd9-a259-436437c76475-uid1005 on /media/secure type vfat
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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.
View 6 Replies View RelatedI am using a Laptop with Fedora 12 and got a recent issue with the power management. I am not sure if this issue is Fedora-related, thereforeI have a (relatively) new main battery in my laptop and a (relatively) new Ac adapter (both not older than 6 months). Besides, a second battery is installed. Recently, I took out the second battery because I needed to use the CD rom drive. Then I put back the second battery (when the laptop was off, of corse).
After I switched the Laptop on again, everything works fine unless the laptop is thinking I am unplugging and plugging in the AC adapter every 3 seconds or so. I can see that behavior when clicking on the battery symbol, as the following terms change every few seconds:AC Adapter: Plugged inAC Adapter: Not Plugged inAlso I notice that the batteries are much slower charged than before when the laptop is operating, and even slower or halting when the laptop is powered off.
Whenever I plug in my PSPgo via USB, it shows up in Nautilus as:
Code:
The first line is the system's onboard memory, and the second line is my 16 gig memory card. It used to mount as:
Code:
I *cannot* unmount the drive. The computer does not seem to be able to find the mount point to take it off from. When I unmount from Nautilus, it says:
Code:
Error unmounting:
If I just unplug the drive, the entry in /media remains as 1C[glitchy box thing][series of underscores] (see screenshot)
I tried looking at the drive in gparted, and it says:
Code:
Code:
Is my PSPgo becoming corrupt or something? That would be supremely unpleasant. I'd definitely like to avoid that, if at all possible.
I plug a USB device, it gets a /dev entry, e.g. sdf, i mount its filesystem, then some program opens a file on this filesystem. I unplug this device, its /dev entry disappears, but if i replug this device again, it gets another name - sdg.
How can i force the program to close the file so the filesystem is ready to be unmounted without using "lazy unmount" to release the device name, BUT so that the program doesn't crash after trying to make I/O to this file, and, of course, without having to kill the program?
I boot linux from a usb drive so I can carry my distro wherever I go - I've been doing it for quite some time now and it's always worked wonderfully. Problem: This morning my little cousin unplugged the computer WHILE I was booting into linux. Power loss has happened before, but with no ill effects. This time however, it's decided it won't boot. The screen clears, and just as GRUB is about to load, it freezes and the computer reboots over and over.
I booted to a LiveCD of Ubuntu to try and fsck the drive, but it won't mount the volume. I've worked with this install so long, and have customized it so much I **really** don't want to do a reinstall.. What can I do?
So trying to use skype. all is going well, except when I speak or even as soon as the female voice from the testing service comes on, the input volume automatically starts dropping. this is an issue, as my voice sounds quieter and quieter as the call progresses. Any thoughts or how I may lock it at a higher input volume?
View 2 Replies View RelatedI've installed Samba on my Home Theater PC but none of my other computers can stay connected to it. Sometimes it drops connections right away, other times it takes several minutes.either way, a pc will never stay connected longer than 20 minutes.
I have the following OS's in my home
OSX Snow Leopard
Server 2003
Server 2008
Windows XP
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Lately about half the time I boot up on 9.10 it stays at the tty & asks for my login & password. It will just stay there for about a minute or so & thenboot up normally whether I enter anything or not. I have it set for auto-login & it never was a problem before. Some times it boots up normally without going into the login screen at all. The only thing that is different is one of the 5 year old kids I let use the computer for the internet & the computer doesn't always get shut down right(turn the power off). I suspect that has caused the problem but it happens now even when I know its been shut down right.
View 1 Replies View RelatedJust installed kubuntu 10.10 on a dual boot with winxp on my asus r101 netbook.
wireless connects perfectly, but after roughly 30 seconds, i cant access any address or ping an url or ip. however network manager says im still connected. so i click on network manager, and click on the wireless connection, it then reconnects in a couple of seconds, and all is good again. i carry on browsing, and 30 seconds later the same happens again!!!
my wireless signal is fairly week, however connection works everytime and in xp this is not an issue.
After installing ubuntu 9.10 on external HDD I cannot boot vista if external usb is unplugged(where ubuntu is installed). it says grub loading and after that recover grub ( i think that is what is says ... not certain in this moment ) anyway hope you get my dilemma. If you need more information I'll be glad to provide it.
View 9 Replies View RelatedI'm using Ubuntu 9.04 64 bit on an Asus laptop and the wireless connection disconnects randomly for a while and keeps searching for the signal. When it finds it I have to put in my WEP key again to get it to connect sometimes only once or sometimes 2 or 3 times. This is getting quite annoying.
View 9 Replies View RelatedHere is the layout of my network:My cable modem plugs into eth0 on my ubuntu server which acts as a firewall (shorewall) and dhcp server to my lan. A dd-wrt access point is plugged into eth1 and then a bridge connecting my xbox360 and another bridge connecting a desktop computer.Everything works pretty well, except a few times a day, my network will just shut down. The wireless on my macbook and my wife's laptop will just shut down, and if my xbox is running, it will lose connectivity. It will be down for maybe a minute or two, and then come back up like nothing ever happened.I never had this problem when I had just a dd-wrt router running everything instead of my server.When I ssh into my server afterwards and run dmesg, this is what I will get:
Code:
[398598.251548] martian source 169.254.1.255 from 169.254.1.33, on dev eth1
[398598.251565] ll header: ff:ff:ff:ff:ff:ff:00:23:69:3d:b1:82:08:00
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