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  • ubuntu is not booting [duplicate]

    - by prasannajit
    This question already has an answer here: After update, get “error: file not found.” followed by “grub rescue> _” 5 answers last night i was trying to upgrade my ubuntu 12.04 to 12.10. every update was completed and finally when it asked for restart ,i restarted the system, then onwords it is not starting up showing message error:file not found. grub rescue> _ can any one plz help how to get rid of this problem. my system is dual os (windows 7 and ubuntu ) hp pavellion dv4 series

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  • How do you make a bootable usb stick on OSX with a corrupted harddrive`?

    - by Nick
    I cant access the desktop because my harddrive is corrupted. Therefore I want to make a bootable USB stick so i can transfer all of my important files to my External HD. Problem is that Im stuck on Step 3 --- http://www.ubuntu.com/download/help/create-a-usb-stick-on-mac-osx . Im not sure of what i should change this to: hdiutil convert -format UDRW -o ~/path/to/target.img ~/path/to/ubuntu.iso It says convert failed - No such file or directory. Obviously the problem is that i dont know the path to the USB, maybe you know how to find out? Please help me. Thanks. ps. Ive downloaded the ubuntu desktop amd64+mac.

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  • Can I stop battery charging at say 80% and switch to AC?

    - by elim
    While I was looking for a battery management utility for my Dell E5420, I came to read this post - How can I limit battery charging to 80% capacity? . Sofar, I haven't found one that relates to my laptop. So, I wonder now if any battery manager utility can be found for my laptop specified above. I would be happy if someone could point me if such utility is available under Ubuntu 12.04 that can stop charging a battery at a certain percentage and to ONLY use A/C mode. Again, to start using battery mode when the A/C is off or when the battery level reaches at certain level. Thanks for all your help. Elim.

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  • How to mount NTFS drive at startup

    - by user3403
    I'm not even sure if this is the right question, but basically I have a partition with Windows 7 on it (named Acer in my Ubuntu places menu) that I have to click on every time I start the computer in order for my music to come up in Rhythmbox, since my music is stored on the windows drive. What I want to do is have the NTFS drive "Acer" mount automatically when I start the computer, so my music is there automatically.

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  • (SYSLINUX QUESTION) How to launch command prompt once syslinux boots up

    - by user1294023
    I have created a bootable USB drive using SYSLINUX I am booting my x86 system correctly. Once system boots I want to stop at console (command prompt) where I can type linux commands (cd etc) and run my executable file manually. Does that mean I have to have busy box installed (for basic commands). What makes system stop at command prompt? I do have /dev/console. My serial console is tty1. Any help is appreciated. #syslinux.cfg serial 0 9600 default MyProgram prompt 1 label Linux display message.msg timeout 100 kernel bzImage append console=tty1,9600 vga=773 initrd initrd.img

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  • Ubuntu 13.04 Raring Ringtail not booting

    - by Kristjan
    Hello my problem is getting annoying. Its my hard drive whats being funny i guess but here's the problem , before updating ubuntu everything was fine , and now im stuck on loading screen with white and orange dots , when i press S the system crashes and gives black screen and ctrl+alt+f1 doesnt show anything , system works fine on liveCD but i want it working on harddrive , any suggestions what to do , if i can access harddrive but not system itself? how i could fix it? i hope someone can help me out real soon.

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  • creating extended partition

    - by SidhuHarry
    this is my current hard disk status(Running linux Mint LIVE CD) i have- Ubuntu 12.04 on 206 GB partition at dev/sda1. dev/sda2 system reserved. Windows 7 on 90GB partition at dev/sda3 and linux swap in extended partition. what i want to do- I want to install Linux mint KDE on my system for that i want to create a new partition of 30GB(by shrinking the free space available at dev/sda1), i can't create that because i can create only 4 Primary partitions which are already there. so do i have to delete the Swap partition? and if i did how to force Mint KDE and Ubuntu 12.04 to use/share same swap space in new logical partition?

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  • xset: unable to open display

    - by user287878
    for the longest time after about 5 minutes my screen would blank out. Now the screen will go blank after 5 minutes but then 2 seconds after that it will light up white and keep the laptop backlighting on. I didnt change any settings to my knowledge it just happened randomly after powering it on one day and has occurred since then. I wish to resort back to blanking the screen out completely since i leave this computer on all the time and its hard to sleep with a huge white light all the time. "xset dpms force off" just yeilds me ---- xset: unable to open display ""

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  • Problems increasing root size

    - by user212866
    I'm running out of space, so I tried to increase root size using this link: Increase size of root partition after installing Ubuntu in Windows Here is the output Filesystem Type Size Used Avail Use% Mounted on /dev/sda7 ext4 6,2G 5,6G 308M 95% / udev devtmpfs 965M 4,0K 965M 1% /dev tmpfs tmpfs 389M 892K 388M 1% /run none tmpfs 5,0M 4,0K 5,0M 1% /run/lock none tmpfs 972M 440K 971M 1% /run/shm /dev/sda5 fuseblk 12G 6,1G 5,8G 52% /media/Ubuntu /dev/sda2 fuseblk 278G 260G 19G 94% /media/AC4CC70D4CC6D16E I tried to allocate 16Gb in the host (/dev/sda2 which is windows 7 partition). When I get to the \ubuntu\disks folder, I only get the "new.disk" file which weighs the 16Gb allocated and not the "root.disk" file too. Also, the /dev/sda7 size doesn't increase. Could you please help me? Many thanks

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  • 12.04 to 12.10 upgrade failure

    - by Toscano
    In upgrading 12.04 to 12.10 via system upgrade when the system rebooted all I got was my desk-top without any command icons. Now all my files are locked into 12.10 and no way to retrieve them. I finally reinstalled 12.04 in a new partition but I don't have the knowledge on how to access 12.10 from it. Being a newbie with Linux I feel like I have all thumbs. I'd like to correct 12.10 but have to idea on what the problem is or how to access it. HELP!!!

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  • 'mount: error while loading shared libraries: libudev.so.0 : no such file or directory' error while booting

    - by user199551
    I was trying to load a version of CGminer which was returning a libudev type error, and followed a supposed solution here but it destroyed my system (so it seems). I loaded the system in recovery mode from GRUB but all that done was actually tell me what I something is broken, do not know what to do next. I think I somehow associated a libudev.so.0 to 1 or 1 to 0, I am not sure what I did and how to fix it.

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  • Installing 12.04 alongside windows 7

    - by user1425394
    Trying to install Ubuntu 12.04 alongside windows 7 home. However when I get the installation option it says that there are already multiple os installed and it dosn't give *me the option to install Ubuntu alongside windows.* The problem is that I have no other OS installed. No my question hasnt been answered at Installing Ubuntu with Windows, which is left and right when allocating space? 5 answers My question has nothing to do with which is left and right when allocating space? Please read question before posting an unrelated answer

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  • Cant get to install menu, liveCD

    - by user204979
    When I tried to run the Ubuntu install disc i get a purple screen with some little images down the bottom, then a flashing cursor for a second and then the screen goes black like there is no in I have tried changing BIOS settings that supposedly interfere, different disk drives and trying to access the advanced menu all to no avail! All the answers for black screens require you to be able to get the menu which i cant! Help would be much appreciated!

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  • Trouble installing Ubuntu.

    - by CV13
    I have a blank 1TB hard drive that I have run ubuntu on before. I recently formatted it and am trying to reinstall Ubuntu 12.04 LTS on there. Using the Universal USB installer and the 64-bit iso file, I booted up my computer with only my 1TB hard drive connected. I go through the installation process normally, until I restart my computer at the end. Once restarted, I start to experience the problem deal with here. When I run it normally, it goes to a black screen with a blinking cursor. When I select the "Recovery Mode" option, a bunch of lines scroll across the screen, the last of which is "hostap_pci: Registered netdevice wifi0". It then stops there with a blinking cursor. When I follow the instructions on the page I linked to (replacing "quiet splash" with "nomodeset") and bunch of lines scroll through after I press Ctrl+x. The last line displayed is Adding 8386556k swap on /dev/sda5. Priority:-1 extents:1 across: 8386556k It then stops there with a blinking cursor. How do I fix this problem?

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  • No partitions in Ubuntu isntallation

    - by user204212
    Today, with the new version of Ubuntu, I have decided to install it in my laptot, but running with Windows 8, which is the OS I have installed now and that I don't want to uninstall, because I need some programs. I have downloaded it and burned into a CD. Everything in the "installation" goes right untill I have to choose where to install it. It doesn't recognise my Windows 8 and, moreover, it sees my disk as it was all empty space (500Gb). I can't install it and I don't know what to do, so let's see if you can help, because you know a lot more than me in this topic :) Thanks!

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  • Power Law distribution for a given exponent in C# using MathNet

    - by Eric Tobias
    Hello! I am currently working on a project where I need to generate multiple values (floats or doubles preferably) that follow a power law distribution with a given exponent! I was advised to use the MathNet.Iridium library to help me. The problem I have is that the documentation is not as explicit as it should be if there is any! I see multiple distributions that fit the general idea of the power law distribution but I cannot pinpoint a good distribution to use with a certain exponent as a parameter. Does anybody have more experience in that matter and could give me some hints or advice?

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  • programmatically controlling power sockets in the UK

    - by cartoonfox
    It's very simple. I want to plug a lamp into the UK mains supply. I want to be able to power it on and off from software - say from serial port commands, or by running a command-line or something I can get to from ruby or Java. I see lots written about how to do this with X10 with American power systems - but has anybody actually tried doing this in the UK? If you got this working: 1) Exactly what hardware did you use? 2) How do you control it from software? Thanks!

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  • SurfaceView for Camera Preview won't get destroyed when pressing Power-Botton

    - by for3st
    I want to implement a camera preview. For that I have a custom View CameraView extends ViewGroup that in the constructor programatically creates an surfaceView. I have the following components (higly simplified for beverity): ScannerFragment.java public View onCreateView(..) { //inflate view and get cameraView } public void onResume() { //open camera -> set rotation -> startPreview (in a thread) -> //set preview callback -> start decoding worker } public void onPause() { // stop decoding worker -> stop Preview -> release camera } CameraView.java extends ViewGroup public void setUpCalledInConstructor(Context context) { //create a surfaceview and add it to this viewgroup -> //get SurfaceHolder and set callback } /* SurfaceHolder.Callback */ public void surfaceCreated(SurfaceHolder holder) { camera.setPreviewDisplay(holder); } public void surfaceDestroyed(SurfaceHolder holder) { //NOTHING is done here } public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { camera.getParameters().setPreviewSize(previewSize.width, previewSize.height); } fragment_scanner.xml <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent"> <com.myapp.camera.CameraView android:id="@+id/cameraPreview" android:layout_width="match_parent" android:layout_height="match_parent"/> </RelativeLayout> I think I have set the lifecycle correct (getting resources onResume(), releasing it onPause() roughly said) and the following works just fine: pressing home and returning pressing Taskswitcher and returning rotation But one thing doesn't work and that is when I press the power-button on the device and then return to the camera-preview. The result is: the preview is stuck with the image that was last captured before button was pressed. If I rotate it works fine again, since it will get through the lifecycle. After some research I found out that this is probably due to the fact that surfaceView won't get destroyed when the power-button is pressed, i.e. SurfaceHolder.Callback.surfaceDestroyed(SurfaceHolder holder) won't be called. And in fact when I compare the (very verbose) log output of the home-button-case and the power-button-case it's the same except that 'surfaceDestroyed' won't get called. So far I found no solution whatsoever to work around it. I purposely avoid any resource cleaning code in my surfaceDestroyed(), but this does not help. My idea was to manually destroy the surfaceView like asked in this question but this seems not possible. I also tested other applications with surfaceViews/cameras and they don't seem to have this issue. So I would appreciate any hints or tips on that.

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  • audio power on AudioQueue

    - by Tomoyuki
    Hi everyone. I'm now creating an Application using speech recognition.To check the Audio Power coming in through the microphone, I wrote a method as follows. -(void)checkPower(AudioqueRef)queue{ UInt32 expectedSize= sizeof(AudioQueueLevelMeterState); AudioQueueGetProperty(queue, kAudioQueueProperty_CurrentLevelMeter, audioLevels, expectedSize); NSLog(@"average:%f peak:%f",audioLevels.mAveragePower,audioLevels.mPeakPower); } I found that sometimes mAveragePower was larger than mPeakPower, and when mAveragePower was 1.0, in other words, averagePower is regarded as max, mPeakPower was lower than 1.0. I think that generally this result is inpossible. please Let me know if you have any information about sound power on CoreAudio. thanks.

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  • How to compute power spectrum from 2D FFT

    - by user1452954
    I've encounter a problem when doing my lab assignment, not sure how to implement this: Use fft2 on a gray image and to do Fourier transform and then compute the power spectrum. This is my code so far: >> Pc = imread('pckint.jpg'); >> whos Pc; Name Size Bytes Class Attributes Pc 256x256 65536 uint8 >> imshow(Pc); >> result = fft2(Pc); My question is from the result. How to computer power spectrum?

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  • Can't boot up computer windows 8 installation

    - by danny ramirez
    I wanted to install Windows 8 with a volume partition and when the Windows 8 was installing it rebooted and it gave me an error: The digital signature for this file couldn't be verified. File :windows \system 32\winload.exe error code 0xc0000428. I have tried bootec commands and they didn't seem to fix it. Also my Windows 7 got deleted and I only have to boot with the Windows 8 error, so I can't do anything not even boot to safe mode. I have tried to install Windows 8 from disk later on and it won't let me because it keeps rebooting and starting the installation again, so I took off the disk before it rebooted and it takes me to that error again. Remember that's my only boot option so I'm stuck in the installation disk.

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  • INACCESSIBLE_BOOT_DEVICE on Windows 8.1 Bootcamp

    - by Ruby MewMew
    I'm on my MacBook Pro and I want to use my Bootcamp partition to work on one screen. I've installed Parallels 9 and after I installed it and configured it to look at my Windows partition through the Bootcamp Wizard it gives me an "INACCESSIBLE_BOOT_DEVICE" error when I try and boot. I figured it must be an issue with parallels so I've rebooted and now I'm getting it when I try to boot into Windows 8.1. Any ideas? Thanks

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  • Entering supervisor mode in PhoenixBIOS

    - by Tom
    I'm trying to change the boot order on a VM that uses PhoenixBIOS. I can get to the setup utility. However, I can't figure out how to get into supervisor mode, which is required to change the boot order. Can anyone tell me how to do this? My Google-fu fails me.

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