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Thread: grub boot parameter to

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  1. #1
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    grub boot parameter to

    Hello people; I have a good one .

    Where is the boot parameter reset ?
    And what is the meaning of 'to' ?
    The kernel boot line from /var/log/Xorg.0.log:
    [ 54.546] Kernel command line: BOOT_IMAGE=(hd0,msdos1)/vmlinuz root=/dev/sda1 to
    confirmed to be 'to' "
    sysop@1404mini:~$ cat /proc/cmdline
    BOOT_IMAGE=(hd0,msdos1)/vmlinuz root=/dev/sda1 to
    Whereas the boot directives have 'ro' set:
    /etc/fstab:
    UUID=3a47f1f1-ed1f-4134-b6aa-be101a7d97b4 / ext4 errors=remount-ro 0 1
    And in /boot/grub/grub.cfg
    linux /boot/vmlinuz-3.13.0-100-generic root=UUID=3a47f1f1-ed1f-4134-b6aa-be101a7d97b4 ro text
    My google-fu is failing me in this respect .

    when all else fails
    ask on the forum
    THE current(cy) in Documentation:
    https://help.ubuntu.com/community/PopularPages

    Happy ubuntu'n !

  2. #2
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    Re: grub boot parameter to

    Hi Bashing-om,
    I would suggest you check the file /etc/default/grub and check the line GRUB_CMDLINE_LINUX_DEFAULT or the line GRUB_CMDLINE_LINUX doesn't have a typo in it. I suspect there may be a typo somewhere as "r" and "t" are beside each other on the keyboard. I too have never seen "to" as a boot parameter.

    If there is a typo in /etc/default/grub the xorg log you see "to" in may be picking it up as an error.
    Regards, yeti

    Edit: I would also suggest you double check any files in /etc/grub.d you may have at any time altered (if you have ever done so, that is)
    Last edited by yetimon_64; October 23rd, 2016 at 02:46 AM. Reason: further check suggestion

  3. #3
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    Re: grub boot parameter to

    Normally the ro parameter comes from /etc/grub.d/10_linux so you might check there as well.
    Xubuntu 16.04/MacBookPro9,1 ♦ CentOS 7 Core/Debian jessie/Slackware 14.2/Ubuntu 18.04/Xubuntu/VirtualBox
    If your questions are resolved to your satisfaction, please use Thread Tools > "Mark this thread as solved..."

  4. #4
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    Re: grub boot parameter to

    yetimon_64; halogen2; Thanks guys.

    This has really got me . And spurs on my thirst for knowledge.

    I Find no faults in /etc/default/grub :
    GRUB_DEFAULT=0
    #GRUB_HIDDEN_TIMEOUT=0
    GRUB_HIDDEN_TIMEOUT_QUIET=false
    GRUB_TIMEOUT=10
    GRUB_DISTRIBUTOR="My-Work-14.04"
    GRUB_CMDLINE_LINUX_DEFAULT="text"
    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,0xe fefefef"

    # 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=1600x900
    This configuration has worked well for a long period of time - huuuummm come to think of it -
    I did not notice the 'to' until the new -100 kernel install . Will boot an older kernel and see .

    Nor have I messed with the config files in /etc/grub.d/ in a very long while . But will take the time to look through them .. but, as the file /boot/grub/grub.cfg is clean I do not expect to find any errors .

    This is on a 14.04 minimal solid/stable install with xfce as the DE. Be also aware that I have a too new graphics card that has no support in 14.04 and loading the vesa driver .

    to Who is this masked man ?

    an itch
    I just gotta scratch
    THE current(cy) in Documentation:
    https://help.ubuntu.com/community/PopularPages

    Happy ubuntu'n !

  5. #5
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    Re: grub boot parameter to

    Quote Originally Posted by Bashing-om View Post
    ...to Who is this masked man ?
    an itch
    I just gotta scratch
    That has got me "scratching" my head as well .

    I just looked at the kernel parameters available on kernel.org --here--, and no mention of any "to" parameter. "ro" is listed though.

    But will take the time to look through them
    I suggest you go straight to the file /etc/grub.d/10_linux for checking as I think halogen2 is correct about that being where that kernel parameter is set from. That may quicken your search up a bit, hopefully.

    Edit: I just noted the "text" setting in the GRUB_CMDLINE_LINUX_DEFAULT line and am wondering if it means "text only". It may be related to that in some way ?
    Last edited by yetimon_64; October 23rd, 2016 at 04:02 AM. Reason: noted "text" in GRUB_CMDLINE_LINUX_DEFAULT

  6. #6
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    Re: grub boot parameter to

    @ yetimon_64;

    Yeah ; I have spent several hours on this and have expended my google-fu. I have yet to find any hint what 'to' is.

    And yes too on to= (t)ext (o)nly . I look over this system quite a lot and this is the 1st time this boot parameter has come to my attention.

    Will continue to investigate, see what I can find out .
    Will reboot with older kernel and will look through grub's config files ; and then report my findings.

    together we can
    THE current(cy) in Documentation:
    https://help.ubuntu.com/community/PopularPages

    Happy ubuntu'n !

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