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Thread: Grub Issue

  1. #1
    Join Date
    Mar 2010
    Location
    Evansville, IN
    Beans
    75

    Grub Issue

    My pc goes to the grub screen, which didn't use to happen, and my key board and mouse do not work. I can't select a version to boot into. I have seen my pc shut off while streaming video. Right after it did that tonight the problem started. The pc is my htpc and I don't update it. It's running 9.1 with a gnome desktop. Anyone have any ideas?

  2. #2
    Join Date
    Mar 2010
    Location
    Evansville, IN
    Beans
    75

    Re: Grub Issue

    I tried to reinstall grub with this.

    Command line
    Boot your computer up with Ubuntu CD
    Open a terminal window or switch to a tty.
    Go SuperUser (that is, type "sudo -s"). Enter root passwords as necessary.
    Type "grub"
    Type "find /boot/grub/stage1". You'll get a response like "(hd0,1)". Use whatever your computer spits out for the following lines.
    Type "root (hd0,1)", or whatever your hard disk + boot partition numbers are for Ubuntu.
    Type "setup (hd0)", to install GRUB to MBR, or "setup (hd0,1)" or whatever your hard disk + partition nr is, to install GRUB to a partition.
    Quit grub by typing "quit".
    Reboot and remove the bootable CD.

    When I got to "grub" it said grub not installed. So I did apt-get install grub. I don't think I installed it onto my hard drive because when I rebooted nothing changed.

  3. #3
    Join Date
    Jul 2009
    Location
    California
    Beans
    261
    Distro
    Kubuntu 19.10 Eoan Ermine

    Re: Grub Issue

    After you run 'sudo apt-get install grub' you have to run 'sudo grub-install /dev/sda' where /dev/sda is the location of your hard drive that you want grub on. If you only have one HDD it will most likely be /dev/sda but if not you will have to find out. You can run 'sudo fdisk' or other commands to figure this out if you're not sure.
    System: Lenovo G50
    CPU: 4x intel core i3-4030U 1.90GHz
    GPU: Intel HD Graphics
    RAM: 6 GB

  4. #4
    Join Date
    Mar 2010
    Location
    Evansville, IN
    Beans
    75

    Re: Grub Issue

    Can high cpu temps cause some of these problems? I went into my bios and my keyboard was working. I glanced at my cpu temp and it was at 88C. My house is hot right now I have no ac on because I am poor.

    I'll try what you said after work buuntu. Do you know why it told me I didn't have grub installed when I can see the screen after I boot into my hdd?

    In the past it never went to the grub screen so I would have not known if my keyboard ever worked there. Is there a way to config my grub from the live cd to skip the screen?

  5. #5
    Join Date
    Apr 2008
    Beans
    11,707

    Re: Grub Issue

    You probably have grub 2 and you're trying to use legacy grub commands to reinstall grub.

    That will NOT work!

    Please save us all time and post the output of the Boot Info Script as described here:

    http://bootinfoscript.sourceforge.net/

  6. #6
    Join Date
    May 2007
    Location
    Virginia, USA
    Beans
    13,377
    Distro
    Ubuntu Mate Development Release

    Re: Grub Issue

    Quote Originally Posted by Failboat88 View Post
    Can high cpu temps cause some of these problems? I went into my bios and my keyboard was working. I glanced at my cpu temp and it was at 88C. My house is hot right now I have no ac on because I am poor.
    Can't give you a specific answer because the operational temperature range is CPU-specific, but in my experience, most CPUs tend to run around 40C when idle and get up into the 50's or 60's at most when under load. It's not uncommon for shutoff thresholds to be set at 70C. So, a temp in the upper 80's is really HOT.

    And, yes, when the CPU gets too hot, it generally either throttles back to a slower speed (to cool down), or it shuts down.
    Ubuntu 20.04, Mint 19.10; MS Win10 Pro.
    Will not respond to PM requests for support -- use the forums.

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