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• Laptop freezes on boot, not sure where to start

  - by J. Pablo Fernández

  I have an Ubuntu laptop that stops responding when booting up. It will change between consoles with ctrl-alt-FN but pressing enter in the console would not even enter a blank line. The last printed line when booting up in recovery mode was "Skipping EDID probe due to cached edid". Any ideas what might be wrong? Pressing ctrl-alt-del successfully rebooted it when in that mode. Another symptom is that GRUB stopped booting automatically, not sure if related (I doubt it).

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• grub2 loopback booting ubuntu server iso

  - by Thermionix

  I've got usb-keys setup to multi-boot different linux images using grub2 loopback. The standard ubuntu release isos boot fine, however when attempting to use the server iso it will fail to install saying 'unable to detect cd-media for installation'. the grub.cfg entry; menuentry "ubuntu-12.04-server-amd64" { set isofile="/boot/ubuntu-12.04-server-amd64.iso" loopback loop $isofile linux (loop)/install/vmlinuz file=$isofile/preseed/ubuntu-server.seed ro noprompt noeject -- initrd (loop)/install/initrd.gz } I've attempted to add the following parameters as the fromiso works for debian images on the key iso-scan/filename=/boot/ubuntu-12.04-server-amd64.iso iso-scan/filename=/dev/disk/by-uuid/2859-44B7/boot/ubuntu-12.04-server-amd64.iso fromiso=/dev/disk/by-uuid/2859-44B7/boot/ubuntu-12.04-server-amd64.iso

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• How do I remove Nvidia drivers and revert to nouveau (12.04)?

  - by Zark

  I'd like to give the new nouveau drivers a try. When I try a Ubuntu live distro, they work pretty flawlessly, but I don't seem to be able to use them correctly on my installed system. What I do is remove Nvidia drivers from the Additional drivers utility and reboot, but what I get is no 3D acceleration and low resolution on my monitor. What am I doing wrong? I wonder if I might have broken something when I messed up with grub trying to fix the infamous plymouth splash screen... Thanks for your support

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• initramfs - Unable to find a medium containing a live file system

  - by LittleBobbyTables

  I'm desperately trying to install ubuntu 12.10 64bit on my new Ultrabook. Its a Sony T13 with 8gb ram, 256gb ssd, i7, windows 8. I have an extra partition, D: "UBUNTU" already created with about 30gb space using FAT32. Ubuntu is MD5 checked, on a previously working USB stick using UNetBootin. Grub loads fine When I ask to test out Ubuntu ("Try ubuntu without installing") it shows the purple loading screen for a bit then brings up this error in a busybox terminal: initramfs - Unable to find a medium containing a live file system Things I've tried that don't work: Different versions of Linux (Fedora, Arch, SL, even gParted) Using USB2/3 - No difference Legacy or UEFI - different interface, but same error BIOS has no option for anything "ACHI" related I have read through tons of other people having this problem and diligently tried all the above solutions, with no luck.

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• How to make a disk image and restore from it later?

  - by torbengb

  I'm a new Linux user. I've reinstalled my Wubi from scratch at least ten times the last few weeks because while getting the system up and running (drivers, resolution, etc.) I've broken something (X, grub, unknowns) and I can't get it back to work. Especially for a newbie like me, it's easier (and much faster) to just reinstall the whole shebang than try to troubleshoot several layers of failed "fixing" attempts. Coming from Windows, I expect that there is some "disk image" utility that I can run to make a snapshot of my Linux install (and of the boot partition!!) before I meddle with stuff. Then, after I've foobar'ed my machine, I would somehow restore my machine back to that working snapshot. What's the Linux equivalent of Windows disk imagers like Acronis True Image or Norton Ghost?

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• Black screen with blinking cursor! [closed]

  - by Draco

  Possible Duplicate: My computer boots to a black screen, what options do I have to fix it? From my Windows XP SP3 machine, I downloaded the live image file for Ubuntu 12.04 LTS. I then burned a bootable CD. Then I went into the BIOS and set installation settings to (first) CD drive and (second) disabled. However, when I boot I only get a black screen with a blinking cursor. After some time I might get some error messages. Even if I leave it for hours I get nothing. FYI: I don't know how to go to the GRUB menu. Please make the answers easy since I am a young beginner.

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• Is it safe to resize root partition?

  - by binW

  My HDD is partitioned into two equal sized partitions. First is being used for Windows and Second for Ubuntu. Everything is working fine. But now I want to remove Windows and use the disk completely for Ubuntu. I can easily boot from live cd and use GParted to delete Windows partition and then expand Ubuntu partition to use the whole hard disk. But I want to know if its safe i.e Will resizing Ubuntu partition change any thing else like the partition UUID or any thing else? Do I need to reinstall grub after resizing the root partition? It would be great if some one who has already done this can give their advice here.

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• Cycles through black screen on login after changing password

  - by John L

  On my laptop, I forgot the password to my Ubuntu partition, so I logged into the root command shell on the recovery start up option in GRUB so that I could change the password. On my first attempt to change my user password, I got this error: root@username-PC:~# passwd username (*not my actual user name*) Enter new UNIX password: Retype new UNIX password: passwd: Authentication token manipulation error passwd: password unchanged After doing some research, I discovered that I was stuck as read only on the file system, so I ran the following command to remount the file partition as read/write: mount -rw -o remount / Afterwards, I change my user password using passwd and it was changed successfully. I restarted my laptop and tried to login using the new password but the only thing that happened was after entering my password it flashed to a black screen with some text that I couldn't make out except for "Ubuntu 12.04" then another black screen half a second later, and finally back to the login screen. Repeated attempts to login results in only this action.

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• Failed update of Ubuntu 10.10 results in unbootable system

  - by chessweb

  Hi, yesterday I performed an automatic security update suggested by the update manager on my virtualized (with VirtualBox on a Windows 7 host) Ubuntu 10.10 installation. The update somehow failed and left me with an unbootable system. When I try to boot, I am told that various folders, files, and what not are missing. Then the system drops into a busybox and leaves me with an (initramfs) prompt. This happens with all kernels I get offered by GRUB, although the error messages are quite different from kernel to kernel. Well, the short of it is this: I don't have the slightest idea on how to get back to a working system and this site is the final straw I'm willing to grab. A complete disaster like this following an update initiated and executed by the system is unheard of in Windows-land; at least I haven't heard of it, yet, and therefore I am going to abandon Ubuntu and Linux altogeteher, if there is no remedy. Regards, RSel

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• Ubuntu cannot boot after kernel upgrade

  - by andrey

  Today I have upgraded the Linux kernel (using the Update Manager), from 3.0.0.16-generic to 3.0.0.17-generic. However, after this update, Ubuntu 11.10 cannot boot anymore. I see a strange message which says "initclt: event failed". And if I press [Ctrl]+[Alt]+[F1] it still allows me to log into the text mode. But if I type sudo lightdm, I cannot log into the graphical mode. However, if I choose to boot an older kernel from the GRUB, Ubuntu boots correctly. What should I do, in order to be able to boot the system using the new kernel?

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• Cannot access system after deleting passwd file

  - by joao rodrigo leao

  I was trying to change my user name and also my /home/username and my system started to crash. I deleted the passwd file but I had a backup named passwd_bkp. I tried to rename this passwd_bkp as passwd and it did not work. No commands were being executed... I was in a terminal window. I re-started my system and now I cannot login. The GRub loads two options: Linux and recovery mode. I tried to open a sessions as root but it says the file system is corrupted. I cannot access my files. Did I lose all my files?

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• Multiple problems while installing Ubuntu 13.04 on LENOVO G500 laptop

  - by Balazs Kiss

  Dear Community, I encountered several problems when installing Ubuntu on my new Lenovo G500 laptop. First I bumped in the problem (also reported by many other) of the black screen after booting Ubuntu. This problem I recould solve by changing the "quiet splash" record of GRUB to "nomodeset". Ubuntu install was successful then. After the installation, I had a black screen again when booting up for the first time. I booted up again with "nomodeset", and enabled the external AMD driver at Hardware Drivers. Booting still do not worked (only with nomodeset), and when I log in, the system gives me a "System program problem detected" message, and the system (desktop) does not load in. Please, can you advise me what to do? Shall I re-install Ubuntu? What are the steps to make my ubuntu work with this harver? Hardware: LENOVO G500 with IntelCore i5-3230M 3,2Ghz processor and AMD Radeon HD8570 integrated chip Thank you for your help in advance!

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• How do I make Powertop changes permanent?

  - by arno

  I'm on a Compaq 615 and it's fan is loud as hell. Not much you can do about that but I'm trying to keep the CPU/GPU as cool as possible. This is what Powertop has to say: If I change all of them to "good", the changes don't survive a reboot. Also, upon exiting Powertop I get this: Loaded 8 prior measurements Cannot load from file /var/cache/powertop/saved_parameters.powertop Leaving PowerTOP I added the line to the "grub"-file as suggested here Upon closing gedit I get this: (gedit:2728): Gtk-WARNING **: Attempting to store changes into `/root/.local/share/recently-used.xbel', but failed: Datei »/root/.local/share/recently-used.xbel.9CIMAW« konnte nicht angelegt werden: Datei oder Verzeichnis nicht gefunden The part in German says: Couldn't be created: File or directory not found.

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• Bless doesn't fix white boot screen boot delay for single-boot Xubuntu 14.04 on Macbook 4,1

  - by elephant

  I still have a 30-second delay on the white boot-up screen before Xubuntu loads after trying various combinations of bless --device as recommended here: https://help.ubuntu.com/community/MactelSupportTeam/AppleIntelInstallation#Avoid_long_EFI_wait_before_GRUB I wonder if anyone has experienced this before, or can point me to some good steps for troubleshooting this issue? I have cycled my macbook dozens of times, it would be great to be able to boot quicker. I am single-booting Xubuntu 14.04 (no Mac OSX partitions or any other OS, just a GRUB partition at sda1, a main partition at sda2, and a swap at the end of the drive). Suggestions very appreciated.

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• Can't Dual Boot Ubuntu 12.04 and Windows 7 on Sony Vaio S 15 (2012)

  - by Nathaniel

  I just bought my dad a new laptop for fathers day, a Sony Vaio S 15 (the latest models from Sony) and he wants to dual boot Ubuntu and Windows 7. I put Ubuntu 12.04 on a USB drive and went to install it on the computer, but when I got into the partition part of the install there was no option to dual boot. Only to delete everything and install Ubuntu or 'other'. I installed using the 'other' feature by manually partitioning, however once I installed it the computer wouldn't ever go to grub. From inside windows I used Easy BCD to try and fix the boot loader so it would give the option to boot into Windows 7 or Ubuntu 12.04, but it couldn't detect ANY operating systems on the computer (not even windows). Is it not possible to dual boot on the latest Sony Vaios, or is there a workaround for this?

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• Purple screen on boot, iMac

  - by Eugene B

  I have just installed Ubuntu 13.10 (special iMac iso found here) on the new iMac (dual boot). Installation of rEFIt was completed successfully, as well as the installation of Ubuntu itself. After the final reboot, rEFIt sees this distributive and allows the choice. When I select "Boot linux from HD", it sends me to grub screen, where I can select Ubuntu. And then it gets stuck on the purple screen (smpboot: Booting Node 0, Processors #1 -- for the recovery mode) with no further action. Does anybody know a solution to this problem? P.S.: I have also tried both 32 and 64-bit pc distributives (occasionally) with the same result.

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• Change from tri-boot to dual-boot

  - by Andrew Robinson

  I have been tri-booting Windows 7, Windows 8 Release Candidate and Ubuntu 12.04 LTS for a few months now. I have decided that, since I have no touch screen, I will not purchase Win 8. I now want to get rid of the Win 8 RC, then add that partition space to my Ubuntu partition, but have no idea how to accomplish this. Do I need to uninstall Win 8 RC from within Windows first? The grub loader sends me to the Win 8 loader, where I have Win 7 as the default. Does that complicate things? Any assistance anyone can give would be greatly appreciated.

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• Stuck while Booting Text Mode in Ubuntu 12.04?

  - by sameetandpotatoes

  I edited the /etc/default/grub file and changed: GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash” to GRUB_CMDLINE_LINUX_DEFAULT=”text” This does make Ubuntu boot up into text mode; however, it gets stuck while booting up and it does not show me the login text. Instead it says something like this: Begin running /scripts/init-bottom USB hub found ...More irrelevant things... *Stopping LightDM Display Manager I can press Ctrl + Alt + F2 and see the login and boot up like normal, but is there any reason for this? How can I change it so it does not get get stuck? Edit: After 5 minutes, a new line came up: 557.1206341 ieee80211 phy0: channel change: 5540 -> 5560 failed (3).

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• Brightness issues on MSI GT683

  - by Mitu

  I'm experiencing brightness related issues on my MSI GT683 (Intel Core i5-2410M, nVidia GeForce GTX 560M, Ubuntu 12.04 LTS x64, nVidia driver version 295.40). To start with, when I open brightness settings, the slider is working incorrectly - screen is the dimmest on about 1/3 of a bar, moving it to the left side increases brightness. Next, while pressing the keyboard buttons (Fn+up, Fn+down), brightness changes incorrectly - sometimes 2 steps up/down, but sometimes it's totally irregular - ex. in order to set the lowest brightness, I have to set the maximum, then hit Fn+down, then Fn+up. (after 2 moves from 8 to 2... What's even more strange, while changing brightness from keyboard on boot and on login screen, it works perfect. Tried adding acpi related switches to GRUB, but the brightness settings wouldn't work at all. Any help appreciated.

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• How do I reset my Ubuntu 12.10 password?

  - by Salvador Yniguez

  So my sister gave me this old laptop that has Ubuntu 12.10. The problem is that she has a username administrator password, but she forgot it. I've tried using GRUB and launching recovery mode and using the root shell prompt. And I type the "passwd username" command, and it tells me to type the new UNIX password, but when I try to type a new password it's like my keyboard doesn't even work. It types nothing. What's the problem? Why does my keyboard not type anything when I try to reset the UNIX password? It always works perfectly fine. I'm grateful for any help, thank you.

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• HDMI audio output problems with Radeon card

  - by Matt Robinson

  No matter how much advice I follow, I still cannot get any audio to come out through my HDMI connection. I've tried downloading the latest proprietary FGLRX graphics drivers, and I've also gone into /etc/default/grub and altered GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" into this GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1" But still I cannot get any sound nor can I get HDMI sound output to show up in Sound Settings or Pulse Audio Volume Control. I can get video to show up just fine on my monitor through HDMI so I'm sure this problem is fixable! I know this is an old problem with Ubuntu, but any new strategies into the problem would be much appreciated. With that being said, here are some of my specs: Ubuntu 12.04 LTS AMD Radeon HD 7520G

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• Xen 4.0.1 not booting with device not found error

  - by Disco

  I'm trying to get Xen 4.0.1 run as dom0 on a fresh/clean install of 10.10 desktop (x64). Followed the step by step tutorial at http://wiki.xensource.com/xenwiki/Xen4.0 I have the pvops kernel in /boot, also included the ext4 fs support by recompiling the kernel by : make -j6 linux-2.6-pvops-config CONFIGMODE=menuconfig make -j6 linux-2.6-pvops-build make -j6 linux-2.6-pvops-install Here's my grub entry : menuentry 'Xen4' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 insmod ext3 set root='(hd0,msdos1)' search --no-floppy --fs-uuid --set 2bf3177a-92fd-4196-901a-da8d810b04b4 multiboot /xen-4.0.gz dom0_mem=1024M loglvl=all guest_loglvl=all module /vmlinuz-2.6.32.27 root=UUID=2bf3177a-92fd-4196-901a-da8d810b04b4 ro module /initrd.img-2.6.32.27 } blkid /dev/sda1 gives the : /dev/sda1: UUID="2bf3177a-92fd-4196-901a-da8d810b04b4" TYPE="ext3" My partition shemes is : /boot (ext3) / (ext4) Whatever option i've tried i end up with : mounting none on /dev failed: no such file or directory And message complaining that it cannot find the device with uuid ... It's taking my hairs out, if somone has a clue ...

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• Ubuntu boots up maintenance shell?

  - by Andrew

  Any time I try to start up my computer it goes to a screen titled GNU GRUB version 1.99-12ubuntu5 I can then choose from 5 different options. If I try to just boot Ubuntu, with Linux 3.0.0-20-generic it then goes to a screen saying: mountall: /lib/x86_64-linux-gnu/libc.so.6: version 'GLIBC_2.14' not found (required by /lib/libply.so.2) General error mounting filesystems. A maintenance shell will now be started. CONTROL-D will terminate this shell and reboot the system. root@Brown126:~# Control-D just brings me back to the first screen. And nothing works in recovery mode. How can I fix this?

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• Why ubuntu does not use the kernels installed by automatic update?

  - by Guillaume Coté

  I used the script describe in this question to list the kernel installed on the computer : How do I to remove or hide old kernel versions, to clean up the boot menu? In the 3.2.0, I have 33, 34, 35, 36, 37, 38, 39, 41, 43, 44, 45 and 48. I would expect to be running 3.2.0-48 after a reboot, but I am still running 3.2.0-32. Why the kernels installed by auto update are not used? [I am running 12.04 LTS] /boot/grub/menu.lst was modified for the last time June 16 2013, it contains 3.2.0-32-generic 2.6.32-45-generic 2.6.32-44-generic 2.6.32-43-generic A recovery for each of those and a memtest. I would have expected the kernel between 3.2.0-33 to 3.2.0-48 to be in this file before 3.2.0-32.

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• no back light on my acer aspire 5734z

  - by Dave

  I installed Ubuntu (12.04) on my acer aspire 5734z and the back light stopped working. I have tried the fix by editing the grub file posted on here a couple of days ago but that hasn't fixed it. I have also looked for hardware drivers but that didn't get me anywhere. When I hook up an external monitor it works fine but i have been unsuccessful getting the laptop display to light up. Thanks edit removed link I found a fix here " http://crunchbanglinux.org/forums/post/66562/#p66562 " if anyone has a better fix than the one in that post, let me know.

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