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• SSD on USB 3.0 doesnt always mount

  - by juergen

  I would like to ask you for some support for this issue. The SSD I use is apparently slightly damaged. Atm it shows this popular Corsair Series 3 problem. symptom: the disk is working for some minutes and then just suddenly stops. Two months ago it worked like a charm. This was my boot device in these days. So now I still need to copy some data out of the device which leads me to my question. Usually the SSD is working again for some minutes, when i unplug and replug its power. It gets detected by the system again and I can continue my backup. The problem on Ubuntu is, that it is not recognized again after two or three replugs. I have to reboot to bring it back. To specify this situation: when i unplug and replug my USB mouse before i reboot it is not recognized as well. So something seems to be wrong with the system also. my question: how do i fix this rebooting issue? I will post all the logs you need to analyse. The problem doesnt depend on the interface. I tried USB3.0, 2.0 and Sata already. Thank you! cheers my system: Ubuntu 11.10, Gigabyte G41MT-S2P, Intel E6750 Corsair Force Series 2 - F120, Digitus USB 3.0 Adapter, USB 3.0 interface card

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• Samba share external USB device

  - by bioShark

  I managed to share stuff from my Ubuntu 12.04 to my private network, and the data is visible from a Windows machine. I even shared a hdd that has windows on it. So everything seems to work fine. When I want to share a mounted device (USB pen drive, USB HDD... etc) however, I get from the Windows machine: Access denied on file \... I realize that this is due to the missing rights on the mounted folder. By default a mounted folder gets the equivalent of 700 : drwx------, and the owner myself. But, I can't seem to change the rights on the external device... they remain 700. Is there a special trick I need to do in order to share NTFS mounted usb devices? Thanks P.S. from this Question I see that NTFS devices can not be shared....is this true? It's a bit strange, because I have in my PC 2 HDD's with 3 NTFS partitions, and I can share them without a problem.

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• Why does my PowerBook display “Fixing recursive fault but reboot is needed!” and stop booting?

  - by Blacklight Shining

  I have an old PowerBook G4 that worked (more or less) fine with a previous installation of Ubuntu Desktop 12.04. A few days ago I decided to install Ubuntu Server instead, and got a copy of Ubuntu Server 12.10. The installation seemed to complete successfully, but now, whenever I try to boot the system, it simply halts at some point after I unlock the hard disk. There is a lot of text on the screen (which is normal for me during a boot, except now it's mostly errors and debug information), the last of which is this: [ 26.338228] Fixing recursive fault but reboot is needed! Pressing control command power to force a reboot yields exactly the same results. A search for the error message turned up many temporary solutions involving kernel parameters, but none of them have worked for me. I don't think I can remove the default set of parameters (which I think is quiet splash), but I can pass additional parameters on boot. I've tried booting on AC and battery power, as well as using these combinations of kernel parameters while on battery power: acpi=enable pci=noacpi pci=assign-busse acpi=ht acpi=off nomodeset nomodeset acpi=off Why am I getting this error and how can I fix it?

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• Windows 7 not booting after installing Ubuntu 12.10

  - by Imran Choudhry

  I have Samsung sf511 with Windows 7 Home preinstalled. I installed Ubuntu 12.10 last night. First I mounted downloaded ubuntu 12.10 iso on a DVD from Windows 7, then I restarted, changed the boot option to DVD and let the Ubuntu DVD run. I selected "Install ubuntu alongside windows 7". In the next step I allocated the diskspace . Ubuntu installed perfectly and it ranned OK. I spent a good time exploring Ubuntu. When I restarted to start my work on Windows again and selected Windows 7 to boot, it showed blue screen after booting up (after logging in). I tried restarting several times but the same blue screen keep showing at the same point of bootup. I also restored windows to an earlier time. Left with no option I booted from Samsung provided windows recovery option. The recovery process ran fine but when it restarted to boot Windows for the first time all I see is a black screen. Nothing happens. It switches between dark command promt screen to a pitch black screen as if it's rebooting after every 10 seconds or so. The laptop can be booted from the DVD Drive or USB drive but is not booting from Harddisk. What should I do in order to use both Windows 7 and Ubuntu?

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• How to format FAT32 filesystem infected with windows virus and that is write protected

  - by explorex

  Hi, I have a pendrive with FAT32 filesystem. it is infected with virus dont know which but has autorun.inf and create exe file within folder. I tried to format it with various filesystems and even try to delete it with GParted but couldn't because it says it is write protected i can't even delete files. How to format it? user@explorerx:~$ sudo fdisk -l Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xbd04bd04 Device Boot Start End Blocks Id System /dev/sda1 * 1 498 3998720 82 Linux swap / Solaris Partition 1 does not end on cylinder boundary. /dev/sda2 499 19457 152287585+ f W95 Ext'd (LBA) /dev/sda5 5100 10198 40957686 7 HPFS/NTFS /dev/sda6 10199 14787 36861111 7 HPFS/NTFS /dev/sda7 14788 19457 37511743+ 7 HPFS/NTFS /dev/sda8 499 5099 36956160 83 Linux Partition table entries are not in disk order Disk /dev/sdc: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc13bc13b Device Boot Start End Blocks Id System /dev/sdc1 1 9729 78143488 7 HPFS/NTFS /dev/sdc2 9729 19457 78143488 7 HPFS/NTFS Disk /dev/sdb: 4194 MB, 4194304000 bytes 112 heads, 47 sectors/track, 1556 cylinders Units = cylinders of 5264 * 512 = 2695168 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 2 1557 4091904 b W95 FAT32

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• Grub options are not visible on booting on Samsung ATIV Book 9 Lite running Ubuntu 14.04

  - by mjwittering

  I've managed to install Ubuntu 14.04 on my new Samsung ATIV Book 9 Lite ultrabook. After updating some configuratiosn in the UEFI installation was very easy. The only questions and issue I believe I'm still experience is when booting. I believe when the laptop would be displaying the grub boot options I see the following. There is a black screen with a purple border of 10px around the screen. I'd like to know how I can update my system so that I see the grub boot manager. I've run these commands: sudo cat /etc/default/grub # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT=0 GRUB_HIDDEN_TIMEOUT=0 GRUB_HIDDEN_TIMEOUT_QUIET=true GRUB_TIMEOUT=10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE=640x480 # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" The command was not possible, sudo efibootmgr.

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• Error mounting: mount exited with exit code 13

  - by Mike Williamson

  I keep a windows partition on my laptop for the occaisional bit of Photoshop work. A while ago I noticed that Windows had disappeared from my grub boot menu and when I try to mount the windows partion, my system hangs for a bit and then I get this: Unable to mount 105 GB Filesystem Error mounting: mount exited with exit code 13: ntfs_attr_pread_i: ntfs_pread failed: Input/output error Failed to calculate free MFT records: Input/output error NTFS is either inconsistent, or there is a hardware fault, or it's a SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows then reboot into Windows twice. The usage of the /f parameter is very important! If the device is a SoftRAID/FakeRAID then first activate it and mount a different device under the /dev/mapper/ directory, (e.g. /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation for more details. It seems that chkdsk is a windows command but since I can't boot into windows (since its the windows partition that is the problem) I'm not sure what to do. Here is the output of fdisk to give you the lay of the land: Disk /dev/sda: 250.1 GB, 250059350016 bytes 255 heads, 63 sectors/track, 30401 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x98000000 Device Boot Start End Blocks Id System /dev/sda1 1 10199 81923436 83 Linux /dev/sda2 * 10200 22947 102398310 7 HPFS/NTFS /dev/sda3 22948 29164 49938052+ 83 Linux /dev/sda4 29165 30401 9936202+ 5 Extended /dev/sda5 29165 30401 9936171 82 Linux swap / Solaris Any guidance would be appreciated!

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• How to diagnose and fix Kernel Panic Fatal Machine Check error?

  - by 0x4a6f4672

  I have got a new Samsung Series 7 laptop with dual boot setup for Windows 8 and Ubuntu 12.10. A fine machine comparable to a Macbook Pro. The Ubuntu installation was quite a hassle, but with the help of Boot Repair finally it seemed to work. Or so I thought. Windows 8 starts fine, but if I want to start Ubuntu regularly the following Machine Check Exception error occurs, quite similar to this one [Hardware Error] CPU 1: Machine Check Exception: 5 Bank 6 [Hardware Error] RIP !inexact! 33 <00007fab2074598a> [Hardware Error] TSC 95b623464c ADDR fe400 MISC 3880000086 .. [similar messages for CPU 2,3 and 0] .. [Hardware Error] Machine Check: Processor context corrupt Kernel panic - not syncing: Fatal Machine Check Rebooting in 30 seconds Kernel panic does not sound good. Then it starts to reboot, and the second boot trial often works. Is it a Kernel or driver problem? The laptop has an Intel Core i7 processor. I already deactivated Hyperthreading in the BIOS, but it does not seem to help :-( I also disabled the Execute Disable Bit (EDB) flag in the BIOS. EDB is an Intel hardware-based security feature that can help reduce system exposure to viruses and malicious code. Since I disabled it, the error did occur less frequently, but it still appears occasionally :-( It seems to be the same error as described here and here. Maybe a Samsung specific Kernel problem? A similar error also happens on a Samsung Ultrabook Series 9 (which seems to be kernel bugs 49161 and 47121). At my Samsung Series 7, it still occurs for instance during booting on battery after "Checking battery state". Perhaps anyone else has an idea? These Kernel Panic errors are reallly annoying..

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• Ubuntu installation does not recognize drive partitioning

  - by Woltan

  I have a 1TB drive and installed Windows 7 on a 128GB partition. When I now try to install Ubuntu 11.04 it does not recognize the Windows partition but offers the complete 1TB drive to install Ubuntu on instead. It displays: However, in the Ubuntu Disk Utility the Windows partitions are recognized. What do I need to do in order for Ubuntu to recognize the Windows 7 partition and install Ubuntu as a dual boot? Response to comments The following commands were executed and the results are shown below: fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x34a38165 Device Boot Start End Blocks Id System /dev/sda1 * 1 13 102400 7 HPFS/NTFS Partition 1 does not end on cylinder boundary. /dev/sda2 13 16318 130969600 7 HPFS/NTFS Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x14a714a6 Device Boot Start End Blocks Id System /dev/sdb1 1 60801 488384001 83 Linux parted -l Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: /dev/sr0: unrecognised disk label

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• Why is my Ubuntu 10.10 CD not booting?

  - by Tom Brito

  I have downloaded Ubuntu 10.10 and burned the ISO but it will not boot. I discarded problems with the ISO, as I've downloaded from the official website with no errors, and burned it with no errors. I discarded problems with the burning, as looks like it was recorded with no errors here and later in another computer. I discarded problems with my DVD reader as other cds boots fine. I'm currently using Ubuntu 9.10, I know I can upgrade via internet, but I have this same problem with my Windows XP cd, so I really would like to discover what's going on here.. My Ubuntu 9.10 cd boots just right, but the new one not. What else can be? Or what more precise tests can I make to discover where's the problem? --More info What happens when I try to boot with the Ubuntu 10.10 cd is that it behavior like there's no bootable cd in the drive. It just don't find the boot on the cd, and start the HD system. My notebook is an Amazon PC Intel Celeron 1.5 with 2Gb memory, a DVD-RW driver, HD samsung with 260GB.

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• Dualboot harddisk encryption

  - by amfcosta

  I have a system with both Ubuntu 11.10 and Windows 7 and I want to encrypt the whole harddisk or at least some of my partitions. My partition table is something like this (the ones marked with * are the ones that need to be encrypted): Windows boot reserved partition *Windows system partition (ntfs) *Windows data partition (ntfs) Ubuntu root partition (ext4) *Ubuntu home partition (ext4) Ubuntu swap As I said I don't need to encrypt the whole disk. What is the best way to accomplish this? Maybe something (TrueCrypt?) where I enter the password before the system boots so that it decrypts the whole hdd? Or maybe individual encryption using Windows-only encryption (for Windows partitions) and Ubuntu home encryption (well, for Ubuntu home partition)? By the way, I almost always use Ubuntu, so it would be nice if I could continue to boot Ubuntu by default but have an option to boot Windows too (like in grub). EDIT: I was thinking of doing this: encrypting ubuntu home with eCryptfs (I think this is used to encrypt home when selected during installation). Encrypting Windows partitions with TrueCrypt. Still having Grub as a bootloader, when I choose ubuntu everything goes as normal (home is decrypted when login in). When I choose windows the TrueCrypt password prompt shows and windows boots.

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• 14.04 LTS Unity no longer boots after last 94 MB update

  - by Harryg123

  I am running 14.04 LTS, Unity, on an HP Pavillion 15, 4GBRAM, 750 GB hdd, I-5 machine, with AMD 8600M graphics card built in. I have disabled the dash and all Ubuntu spyware. I have been faithfully loading all updates as they appear. This morning it asked for a 94 MB update (bringing kernel to .27, I think. Now, I can boot, get to login screen, but it freezes after that. Keyboard doesn't work at that point, but mouse does. I booted into recovery mode, tried to run in generic graphics mode, -- system again froze. I also pressed [esc] during boot, but saw nothing strange; then text disappeared and was replaced by login screen. I am not a hobbyist; this is a production machine and I have a lot of work to do today. Having a standard software update render my machine completely useless... sigh. Perhaps the simplest thing to do would be to revert to the previous configuration. How do I do that? I can boot into recovery mode. But I have no idea how to proceed. TIA for all help. -Harry

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• Fresh install on SSD with Ubuntu and Windows Vista, using whole disk encryption for Ubuntu

  - by nategator

  I would like to do a fresh install on a OCZ Vertex Plus R2 SSD 60GB drive I purchased on the cheap. Since the AES-encryption looks like it may not work optimally for this drive, I would like to set up a dual-boot to Windows Vista (the only Windows copy I have for clean install purposes) and Ubuntu 12.04 with the best encryption scheme possible. My plan is to have Windows around just in case I need to use a program that won't work with Wine and Ubuntu as my daily OS with all of my information secured in case the laptop is ever stolen or sold. Although this setup will not provide a lot of space, I think I can squeeze both OSes and have enough for second-computer office tasks. So, my questions are: Which OS should I install first, Ubuntu or Vista? Any special considerations when partitioning the drive? How should I install Ubuntu to ensure full disk encryption for the Linux partition(s) and or my daily computing? Is there a significant performance upgrade with doing a solo install of Ubuntu instead of a dual boot setup? Will TRIM, for example, work correctly? Are there any significant security concerns with going the route of a dual-boot, other than the fact that any activity on Windows may be fully recoverable if the drive is stolen or sold? Thanks in advance!

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• Ubuntu installation does not recognize drive partinioning

  - by Woltan

  I have a 1TB drive and installed Windows 7 on a 128GB partition. When I now try to install Ubuntu 11.04 it does not recognize the Windows partition but offers the complete 1TB drive to install Ubuntu on instead. It displays: However, in the Ubuntu Disk Utility the Windows partitions are recognized. What do I need to do in order for Ubuntu to recognize the Windows 7 partition and install Ubuntu as a dual boot? Response to comments The following commands were executed and the results are shown below: fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x34a38165 Device Boot Start End Blocks Id System /dev/sda1 * 1 13 102400 7 HPFS/NTFS Partition 1 does not end on cylinder boundary. /dev/sda2 13 16318 130969600 7 HPFS/NTFS Disk /dev/sdb: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x14a714a6 Device Boot Start End Blocks Id System /dev/sdb1 1 60801 488384001 83 Linux parted -l Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: /dev/sr0: unrecognised disk label

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• How to know why my cd is not booting?

  - by Tom Brito

  I have downloaded Ubuntu 10.10 and burned the ISO but it will not boot. I discarded problems with the ISO, as I've downloaded from the official website with no errors, and burned it with no errors. I discarded problems with the burning, as looks like it was recorded with no errors here and later in another computer. I discarded problems with my DVD reader as other cds boots fine. I'm currently using Ubuntu 9.10, I know I can upgrade via internet, but I have this same problem with my Windows XP cd, so I really would like to discover what's going on here.. My Ubuntu 9.10 cd boots just right, but the new one not. What else can be? Or what more precise tests can I make to discover where's the problem? --More info What happens when I try to boot with the Ubuntu 10.10 cd is that it behavior like there's no bootable cd in the drive. It just don't find the boot on the cd, and start the HD system. My notebook is an Amazon PC Intel Celeron 1.5 with 2Gb memory, a DVD-RW driver, HD samsung with 260GB.

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• Unable to mount USBDRIVE Error creating moint point: Permission denied

  - by steve

  Whenever I plug a usb into my computer a window pops up and says Unable to mount [Name of USB] Error creating moint point: Permission denied steve@goliath:/$ uname -a Linux goliath 3.2.0-32-generic #51-Ubuntu SMP Wed Sep 26 21:33:09 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux steve@goliath:/$ sudo fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 120.0 GB, 120034123776 bytes 255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0f716ee1 Device Boot Start End Blocks Id System /dev/sda1 1 234441647 117220823+ ee GPT WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes 255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0f710ee1 Device Boot Start End Blocks Id System /dev/sdb1 1 2930277167 1465138583+ ee GPT Disk /dev/sdc: 16.0 GB, 16005464064 bytes 74 heads, 10 sectors/track, 42244 cylinders, total 31260672 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xc3072e18 Device Boot Start End Blocks Id System /dev/sdc1 8064 31260671 15626304 c W95 FAT32 (LBA) steve@goliath:/$ sudo mkdir /media/external mkdir: cannot create directory `/media/external': Permission denied steve@goliath:/$ sudo mkdir /media/usb0 mkdir: cannot create directory `/media/usb0': Permission denied steve@goliath:/$ sudo ls -l / | grep media drwxr-xr-x 3 root root 4096 Oct 3 22:48 media steve@goliath:/$ ls /media/ -a . .. MediaShare MediaShare is the the directory on my server that has all my movies and music. If there is any information I left out please let me know.

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• Laptop keyboard and touchpad disabled on startup

  - by JAM

  I use Ubuntu 14.04 LTS on my Toshiba Satellite L775D laptop. 14.04 is the only operating system installed. I am new to Linux and only barely scratching the surface of doing things in terminal. When I boot my laptop keyboard and touchpad are disabled (99.99% of the time) if I do nothing. The only direct effect I can have is to keep pressing the "numlock" key during boot when I notice the "numlock" light goes off. If I do this then I have a 95% chance of the keyboard and touchpad working when I am in the operating system. I am able to use my wireless mouse regardless. I have not seen any messages during boot. Previously I have tried playing with input method settings and utilities as well as language support settings. This same problem exists with the 12.... and 13... versions of ubuntu. With everything I have tried (from looking at other posts/suggestions) it seems I can have only a temporary effect. Please help me find a permanent solution to this problem. thank you.

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• How can I refresh/reinstall/clear/set-to-default my bootup process?

  - by Tchalvak

  I'm currently having a problem with my bootup process that is growing progressively worse as time goes on: While booting, it does a few minutes of hard-drive reading. During that, instead of showing a boot splash screen, it shows various dashes and dots, as if the video card isn't recognizing. The splash screen actually has colors similar to the splash screen (purple), it simply is garbled. It then does a few minutes of hard-drive reads, and if I leave it long enough, sometimes it boots into the desktop (and auto-logs-in). Sometimes, unfortunately, it just hangs on that garbled screen and reads from the hard-drive forever. Notably, I've also stopped being able to access grub during bootup (perhaps it is just not displayed correctly by the video, hard to tell). This is a symptom that has grown over the course of various ubuntu upgrades, at least I suspect that the upgrade process is leaving behind cruft. So, is there a safe way for me to "refresh" the boot system so that it is clean, new, fast, and reliable? For example, to test out a cleanly configured boot, make sure that it works (try before I buy), and then apply it to the system to eliminate as much of this problem as possible? Edit: Here is the requested bootchart: http://imgur.com/9jocF

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• WIN7 and Ubuntu lost after Installing ubuntu 12.04 and win7 dual system ,I have no OS on my laptop now

  - by abos

  Here is the procedure: In the morning I installed ubuntu using a USB directly without config any thing to my win7 system. After install complete, ubuntu installation software tell me to reboot.And everything is just find. While rebooting, there is NO UBUNTU system for me to select,and my laptop go straight to log in using WIN7. NO ubuntu shows on WIN7's configuration(Default System). Log in ubuntu using usb(try ubuntu without installation), I can find ubuntu's filesystem was already there. Formatting the disk on WIN7's disk management, rearranging them to other disk.Still having no trouble with WIN7. In the afternoon try a few times of installation and uninstallation of ubuntu. still shows no sign of selecting ubuntu system. In the evening another trial while installing ubuntu with the third option of: installing ubuntu alongside with INW7, erase win7 and install ubuntu. somethingelse --- my check failed with configuartion for what comes out with the 'something else' option,reboot. And I have no system now with some cmd tips say: Reboot and Select proper Boot Device or Insert Boot Media in selected Boot device and press a key. Files those on win7's orginal file system and Ubuntu filesystem can still be found when I 'try ubuntu without installation'. 5.But I just got no OS when I reboot my laptop normally.

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• Dualboot Asus n56v (ubuntu / win 7 x64) - ubuntu doesn't detect partition table made by windows

  - by user76439

  I have an Asus n56v and I've got troubles installing Ubuntu 12.04 x64. I already have installed Windows 7 x64! The hard drive is: Hitachi HTS547575A9E384 My problem: The installation program doesn't recognize the already existing partitions and is offering only options where there are partitions. Can someone help me out? Is this an ACPI/IDE conflict, missing driver or conflict with Windows 7? (I'm not an expert on Linux, only working sometimes with it.) I now tried out some options concerning EFI with a GTP-table. Everything worked but I wasn't able to fix a dual boot (Windows boot loader) nor with GRUB2. The laptop is still having a BIOS, but is able to boot DVDs/CDs in EFI-mode. Now I try to avoid EFI and GTP using the old windows MBR style. I reinstalled Windows, so far no problem. When I want to try to install Ubuntu, it doesn't detect the already existing partition table. It is just showing me an empty space for the whole disk. Other threads like Ubuntu 12.04 does not see windows already install on my computer (dual installation) don't help me out. os-prober shows me a correct result. I don't know how to deal with gdisk as shown in Installer doesn't detect existing partition table/windows 7 partition. I have 750GB for the whole disk. I'm using: 90GB for Windows reserved partition + system partition, 500GB for data and the rest should be for SWAP and linux-system. How can I make Ubuntu detect the partition table?

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• System in low graphics, deleted linux, grub rescue, can't access windows

  - by First timer

  So I'm pretty new to Ubuntu but I managed to install it with no big problems on both my desktop and netbook. When I installed it on my brother's netbook everything went horribly wrong and now I fear the system is close to beyond repair. The problem was first that it said it did not have any space left (seemed ridiculous since it had a lot). Then Ubuntu began booting into a "System is running in low graphics mode error" which I then tried to fix, using all the tips I could find in here but nothing helped. I think the graphics error and lack of space might have been related but I can't be sure. Finally I gave up repairing Ubuntu and went for a reinstall. Shouldn't have done that! I read that I should simply open Ubuntu through a live usb and choose GParted to delete the Linux partitions so I did and rebooted accordingly. Next, I was to install Ubuntu but now I am only given the option to wipe the whole disk for Ubuntu, not install along with windows 7. If I access GParted I can still see the ntfs partitions that hold windows 7 (there are 2: one labeled RECOVERY and another labeled OS and boot) so why can't I access them? Btw. the OS and boot has a little red mark with a warning that 1 cluster is referenced to multiple times, don't know what that means. If I boot without the live usb I am sent directly into a grub rescue "black screen of the computer will follow no orders". Please, I know that the easiest might be to simply wipe the whole thing clean but there are important files and programs on windows 7. Is there a way to just access windows? It is a dell inspiron 1018 mini netbook, so I have no cd input and no windows 7 installation cd.

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• Booting off a ZFS root in 14.04

  - by RJVB

  I've been running a Debian derivative (LMDE) on a ZFS root for half a year now. It was created by cloning a regular ext4-based install with all the necessary packages onto a ZFS pool, chrooting into that pool and recreating a grub menu and bootloader. The system uses an ext-3 dedicated /boot partition. I would like to do the same with Ubuntu 14.04, but have encountered several obstacles. There is no Trusty zfs-grub package The default grub package doesn't have ZFS support built in. I found a small bug in the build system responsible for that (report with patch created) and built my own grub packages. The built-in ZFS support is dysfunctional, it does not add the proper arguments to the kernel command line I thus installed the ZoL grub package I also use on my LMDE system, which does give me a correct grub.cfg However, even with that correct grub.cfg, the boot process apparently doesn't retrieve the bootfs parameter from the ZFS pool; instead the variable that's supposed to receive the value remains empty. As a result, initrd tries to load the default pool ("rpool"), which fails of course. I can however import the pool by hand, and complete the process by hand. If memory serves me well, I also had to disable apparmor, to avoid the boot process from blocking after importing the pool. Am I overlooking something? Just for comparison, I installed the Ubuntu 3.13 kernel on my LMDE system, and that works just fine (i.e. the identical kernel and grub binaries allow successful booting without glitches on LMDE but not on Ubuntu).

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• No operating system found even when grub2 was reinstalled

  - by Cruzer

  I know there have been many variations on this question and have certainly tried to do my research. I don't really know what I'm doing so I would rather not take risks. I am trying to dual boot xubuntu and windows 7. I started out with xubuntu and just installed windows. Of course, the mbr got overwritten and windows didn't seem to recognize linux. So I booted to the live cd and rewrote the mbr. And of course, now I get the error "No Operating System Found" on startup. I have been following these tutorials to help me out. community.linuxmint.com/tutorial/view/245 unix.stackexchange.com/questions/96977/grub-wont-install ubuntuforums.org/showthread.php?t=2036730 Specifically, I ran these commands: # sdb2 is the partition with xubuntu sudo mount /dev/sdb2 /mnt # sdb1 is my boot partition sudo mount /dev/sdb1 /mnt/boot # not sure what this does, but ran it anyway... for i in /dev /dev/pts /proc /sys /run; do sudo mount -B $i /mnt$i; done sudo chroot /mnt #once chrooted grub-install /dev/sdb update-grub here's a link to my gparted https://www.dropbox.com/s/zpbbzh9z7k1l3pj/gparted.png EDIT--- didn't realize that the drive letters are different in the picture than in my code (its sda in the pic instead of sdb). I have been restarting a lot and sometimes the drive letters change and make my usb into sda.

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• Grub2 cannot detect Windows 8

  - by MetaChrome

  At installation it did not detect Windows. I mounted the Windows partition and have run os-prober with no results returning. I am able to boot Windows or Ubuntu by specifying the partition in UEFI boot order. The bios does not appear to allow booting with legacy. SecureBoot is on. This is with Ubuntu 12.04 LTS on a Inspiron 15. Here is the gdisk: 1 2048 1026047 500.0 MiB EF00 EFI system partition 2 1026048 1107967 40.0 MiB FFFF Basic data partition 3 1107968 1370111 128.0 MiB 0C01 Microsoft reserved part 4 1370112 2394111 500.0 MiB 2700 Basic data partition 5 2394112 544743423 258.6 GiB 0700 Basic data partition 6 606183424 625140399 9.0 GiB 2700 Microsoft recovery part 7 544743424 545230847 238.0 MiB 0700 (/boot) 8 545230848 556949503 5.6 GiB 8200 (swap) 9 556949504 606181375 23.5 GiB 0700 (/) When installing ubuntu, I believe I specified that the bootloader be installed on /dev/sda. I added the following to /etc/grub.d/40_custom but booting ubuntu did not offer a grub menu: menuentry "Windows 8" { set root = "(hd0,4)" chainloader +1 } When booting I think I see "EFI Disk error" flash very quickly before Ubuntu starts booting.

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• Win7 and Ubuntu refuse to coexist

  - by Jeremy

  I'll make this quick: I have an HP laptop with win7, I installed Ubuntu on a separate partition, and when I tried to boot win7 from grub I got the loading screen and no progress-ever. I did a /fixmbr with the windows recovery cd and got back windows, but wiped out grub and my access to Ubuntu. I reinstalled grub from the Ubuntu live usb ( I know I did this correctly) and now windows won't boot, again. I'm a linux noob at a loss. Your wisdom is greatly appreciated! Update in response to Scott Severance: your instructions say to determine the main partition on my computer. I'm not sure what this means... my windows partition is at sda2, my boot partition is at sda1, and my linux root partition is at sda7... Which is the "main" partition? UPDATE: I determined that you were probably referring to the linux root(/) partition, because this was the only partition for which I could follow your instructions without errors. Now, Windows is booting fine (thanks to /fixmbr), but even after the grub instructions there is no grub. It boots straight into windows.

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