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• Linux Software RAID1 Rebuild Completes, but after reboot, its degraded again

  - by zimmy6996

  I have been beating my head with an issue here, and I'm now turning to the internet for help. I have a system running Mandrake Linux, with the following configuration: /dev/hda - This is a IDE drive. Has some partitions on it that boot the system and make up most of the file system. /dev/sda - This is drive 1 of 2 for a software raid /dev/md0 /dev/sdb - This is drive 2 of 2 for a software raid /dev/md0 md0 gets mounted but fstab as /data-storage, so it is not critical to the systems ability to boot. We can comment it out of fstab, and the system works just fine either way. The problem is, we have a failed sdb drive. So I shut the box down, and have pulled the failed disk and installed a new disk. When the system boots up, /proc/mdstat shows only sda as part of the raid. I then run the various command to rebuild the RAID to /dev/sdb. Everything rebuilds correctly, and upon completion, you look at /proc/mdstat and it shows 2 drives sda1(0) and sdb1(1). Everything looks great. Then you reboot the box ... UGH!!! Once rebooted, sdb is missing again from the RAID. It is like the rebuild never happened. I can walk through the commands to rebuild it again, and it will work, but again, after reboot, the box seems to make sdb just vanish! The real odd thing is, if after reboot, I pull sda out of the box, and try to get the system to load with the rebuilt sdb drive in the system, and when I do, the system actually throws and error just after grub, and says something about drive error, and the system has to shut down. Thoughts??? I'm starting to wonder if grub has something to do with this mess. That the drive isn't being setup within grub to be visible at boot? This RAID array isn't necessary for the system to boot, but when the replacement drive is in there, without SDA it won't boot system, so it makes me believe there is something to that. On top of that, there just seems to be something wonky here the drive falling off of RAID after reboot. I've hit the point of pounding my head on the keyboard. Any help would be greatly appreciated!!!

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• Portal 2 in LEGO Stop Motion [Video]

  - by Jason Fitzpatrick

  If you’re a fan of the Portal video game series, this well-executed LEGO stop-motion film combines Portal characters, clever animation, jokes, and even a Black Mesa reference or two. LEGO Portal 2 [via Wired] How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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• Is there a way to manage my Grub menu options from with the GUI/desktop?

  - by Neil Trodden

  With each kernel update, a new entry is placed in Grub to provide a way to boot that specific kernel version. I have about 5 at the moment and, to be honest, once I have confirmed I can boot into the new kernel version, I never go back to a previous version. I'd like to manage the items in this list from the desktop rather than edit the file, is there a way to do this using the GUI from within Ubuntu itself?

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• Ubuntu 12.04 UEFI dualboot Win7

  - by bodo

  I have new laptop Asus N76 with 500GB HDD and 256 SSD. Windows 7 is installed on HDD with partitions: /dev/sda1 fat32 200MB boot (GPT) /dev/sda2 unknown 128MB msftres /dev/sda3 ntfs 94GB (Win 7) /dev/sda4 ntfs 20GB hidden,diag I want to install 12.04 on SSD disk. Is it possible to install GRUB2 at /dev/sda1 partition? Is Ubuntu installer ready for that? Is there some configuration for GRUB2 to setup boot path for Windows 7 (HDD) and Ubuntu 12.04 (SSD)?

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• recover from sudo rm -rf command

  - by user106116

  By mistake, I ended up executing "rm -rf /" command from sudo on my laptop which erased many files before it stopped. Now when I restarted my system , it gives a GRUB rescue prompt. I am having dual boot with Ubuntu 12.04 and Windows 7 I request the help for following: How do I fix the currently installed Ubuntu without overwriting/erasing the left over files (from rm -rf command)? Is using Boot-Repair safe ? Is there a way to directly go to Windows 7?

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• 12.04 home encrypted and I have written down encryption passphrase. How to reset login password?

  - by Stevie

  I set up a friend with 12.04 and he forgot his password. I encrypted his home directory and I have written down the encryption passphrase during the first boot. If he changed his password after I wrote down the encryption passphrase during the first boot is this original encryption passphrase of any use? What should I do to reset or recover his password and keep everything accessible and functionally intact with the encrypted home directory?

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• no login screen: problem with lightdm or plymouth?

  - by a different ben

  When I boot up my system, I don't get a login screen, just the boot log scrolling by, repeating after a while lines like this: * Starting anac(h)ronistic cron [ OK ] * Stopping anac(h)ronistic cron [ OK ] I can change to another virtual terminal, and start lightdm from there with sudo lightdm restart or sudo start lightdm. Other people with similar problems had just lightdm in their /etc/x11/default-display-manager. I've checked mine and it has /usr/sbin/lightdm in there, so that's not the problem.

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• install to USB without touching windows MBR

  - by Robert

  I would like as full of an install as possible (most notably no casper, just straight on the drive) on a USB stick, but I'm not allowed to touch the current configuration of the computer I'll be running it on at all (except of course changing the boot options to boot from usb). Most guides I read are about getting a live install with persistence on USB, or (I think) still replace the MBR with GRUB. Is there any way to combine the two, and not touch the underlying system?

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• Ubuntu login failed to set mode on [CRTC:10] message

  - by polyglot0727

  I recently installed Windows Server 2003 and Ubuntu 12.10 side by side. Both worked ok for the first couple of boots. I can boot to Server, but am unable to boot to Ubuntu. I receive this message. ubuntu login: [ 18.684356 ] [drm:drm_crtc_helper_set_config] ERROR failed to set mode on [CRTC:10] [ 18.840839 [drm:drm_crtc_helper_set_config] ERROR failed to set mode on [CRTC:10]. Any idea what the issue is?

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• Problem after upgrading to 13.10

  - by paul Barnett

  I am a new user to Ubuntu and not a very accomplished user. I have dual partitioned my laptop, recently upgraded to Windows 8.1 and also Ubuntu 13.10.Now when I boot into Ubuntu I get a running line of 3's and squiggles followed by scrolling (with a fail on the line "reload cups, upon starting avahi-daemon to make sure remote queues are populated"). If I press any key, but mostly return, it will boot into the password page. Any ideas? Thanks.

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• How do I format my entire HDD?

  - by Hjke123

  Ok I have recently made some mistakes with installing some operating systems that I should have just kept on a live cd not ubuntu but another os and with my ocd when I saw my lot's of different partitions I just wanted to reset my computer so it boot's up and doesn't load any os and I have to put in my ubuntu live cd and install that and that would be my only os on this computer so I want to know how I can just wipe my entire hard drive so when it boot's I get to put my live cd in and start anew?

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• ubuntu image size 732 mb - too big for cd

  - by memius

  i have an old pc that can't handle a boot stick install, so i have to create an actual, old fashioned boot cd. however, the image size for ubuntu 12.04 is 732mb, which is too large for cds, which can hold only 700mb. the maintainers of ubuntu 12.04 say the image size will never go over 700mb, and indeed, the download size seemed to be 689mb. Brasero says it won't burn the cd because the file is too big what's going on?

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• Common Misconceptions in Physics [Video]

  - by Jason Fitzpatrick

  Take a tour of common misconceptions in physics–such as the nature of gravity and velocity–with this brief and simply animated video courtesy of MinutePhysics. Common Physics Misconceptions [via Neatorama] How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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• How to show Windows System Reserved partition using Ubuntu live dvd?

  - by Veeggon

  All questions in this site ask how to "hide"! I want to fix my boot (fix mrb wont work, I have GPT Disk) by changing some files at Windows System Reserved. GParted shows the following partitions (but Nautilus doesn't): **/dev/sda1 - file system: Unknown - 128Mb - flags: msftres** (this one shows *"Warning: Unable to detect file system! Possible reasons: -file system is damaged -file system is unknown to GParted -there is no file system available (unformated -the device entry /dev/sda1 is missing)"*) **/dev/sda2 - file system: fat32 -100Mb - flags: boot** **/dev/sda3 - file system: ntfs - 500Gb**

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• Partition resize[SOLVED]

  - by borax12

  I have a dual boot system with 1.C:drive with windows 227 GB 2.E: drive in windows 185 GB 3.Ext4 Ubuntu - 38 GB 4.Linux swap - 4 GB I want to decrease the space from E: drive from 185 GB to say about 160 GB and assign the 25 GB achieved from the resizing to the ext4 partition so that my ubuntu home has more space I was told that do a resize in gparted could cause some boot problems,please tell me a safe way to achieve this resizing

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• Sempron 145 core unlocking

  - by Grant

  Call me a cheapskate looking for performance, but I have a Sempron 145 processor that has been unlocked to an Athlon II X2 4450e with a GIGABYTE GA-990FXA-UD3 motherboard, but only one of the two processor cores can be used at a time. If both of the cores are enabled in the BIOS the kernel will hang during boot, If I reboot the system and disable the second core (but not re-lock the processor), it will take me to the grub and then start normally. Is there a way to enable both cores and boot without kernel hangs?

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• help me with my wine, it doesn't work proper

  - by Sebastian Raun Mikkelsen

  When i try to run something with wine, nothing happens! i have many problems with ubuntu so i have tried to get windows 8 back on the computer, but because ubuntu cant run exe files i cant open the installer. evenmore my computer cant boot from a CD/DVD anymore after i installed ubuntu, i turns op with a black screen with a blinking marker at the upper left corner of the screen and after 10 minutes it says something like " cant boot from the selected mediadevice - select another" so how to get windows back?

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• Is CPU Performance Affected by Age?

  - by Jason Fitzpatrick

  Your computer feels a little slower than it did this time last year; is that change something you can chalk up to an aging processor? Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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• After downloading the Wubi installer, what else do I need to do?

  - by Sam M

  If I were to install Ubuntu via the method stated here; http://www.ubuntu.com/download/desktop/windows-installer Will I need to download/install anything else first? Do I simply select "Boot Ubuntu" and then go about my business? Will my HDD need partitioning beforehand? If I save files while running Ubuntu where do they go when I decide to boot Windows instead? Just trying to figure out the best way to use Ubuntu without removing the Windows OS (:

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• Installed without the usual menus. Now I can't log in

  - by Martha

  I tried to install from CD. The computer wouldn't boot from the CD, so I clicked on the 'boot helper', and rebooted the machine. And the first thing I see is do I want to open Windows or Ubuntu (without it asking me whether I wanted to install it alongside Windows or replace it), and when I click on Ubuntu, after a very long time, I finally get a login screen. But I don't have a login, because I never set one up. Help!

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• Graphic crash after Ubuntu 12.04 minor update

  - by user68753

  My problem came after doing a normal packages update in 12.04 and then reboot to never been able to boot normally, it appear the "The system is running in low-graphics mode" window and then I tried to fix the problem reinstalling the gmd. Now I'm reinstalling the whole system, from the USB boot it went everything as usual before that update. I just want to never have to reinstall Ubuntu in this way again. Any thoughts? I'm using Ubuntu 12.04 LTS on an Acer Aspire One D255

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• Ubuntu 12.04 image size 732MB, will it fit a standard CD?

  - by memius

  I have an old computer that can't handle a boot stick install, so i have to create an actual, old fashioned boot CD. However, the image size for Ubuntu 12.04 is 732MB, which is too large for a CD, which can hold only 700MB. The maintainers of Ubuntu 12.04 say the image size will never go over 700MB, and indeed, the download size seemed to be 689MB. Brasero says it won't burn the CD because the file is too big, what's going on?

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• How do I disable a Nvidia 9600GT on MacBookPro 5.1?

  - by Gjan

  i finally put up a Dual Boot with Ubuntu and Lion on my old MacBookPro 5.1 As reported in many cases the discrete graphics card is turned on all the time consuming a lot of power and thus heating up the laptop. Since the discrete graphics card does not support the nvidia optimus technology, the corresponding packge nvidia-prime does not help in this case. Therefore my question is, how to manually disable the discrete graphics card Nvdidia 9600GT ? Preferably a 'switch-on-the-run' version, but a 'set-on-boot' would be totally fine!

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• Continuous integration for Ubuntu Phone?

  - by Klax

  Is there any kind of framework that lets a controlling PC automate the flashing of a connected phone, waiting for the phone to boot and then tell it to download and execute tests from a repository? I know about Autopilot for applications, but I'm more interested in CI of boot loaders, drivers and platform stuff. A related question: Is there a global repository of tests for Ubuntu Phone? Best regards

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• help me with my wine, it doesn't work properly

  - by Sebastian Raun Mikkelsen

  When I try to run something with wine, nothing happens! I have many had problems with Ubuntu so I have tried to get Windows 8 back on the computer, but because Ubuntu can't run exe files I can't open the installer. Furthermore my computer can't boot from a CD/DVD anymore after I installed Ubuntu, it turns up with a black screen with a blinking marker at the upper left corner of the screen and after 10 minutes it says something like Can't boot from the selected media device - select another How do I get Windows back?

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