[nmglug] Weirdness
Brian O'Keefe
okeefe at cybermesa.com
Mon Apr 22 20:45:42 PDT 2019
Thanks Harold. Responses inserted for ease and clarity. Many thanks again
On 4/22/19 9:23 PM, Harold Furbiter wrote:
> Here is a receipe for boot from an older kernel, and how to set it to
> a default.
>
> If you have a few Kernels in your system you can set manually what
> Kernel version will start:
>
> 1.
>
> Reboot your PC with pressed Shift button for display GRUB after
> BIOS will start. You will see something like: GRUB start page
> <https://i.stack.imgur.com/sSCzp.png>
>
/I have booted into older kernels or safe mode this way in the pas. Now
I cannot reboot as all that comes up is the them color screen, no login,
nothing. So I have to do a hard shutdown. I do not get a Grub menu
holding down shift key upon starting. I get a flat theme color screen.
Nothing more/
>
> 1.
>
> Select "Advanced options for Ubuntu" and memorize index of this
> menu line(count starts from 0) On the picture index is 1
>
/Since I can't access Grub menu I can't do any of the following except
edit grub setup file, which I have not done because of above issue/
>
> 2. Select concrete Kernel <https://i.stack.imgur.com/yYhnM.png>
>
> 3.
>
> Select concrete kernel for boot and also memorize index of this
> menu line(count starts from 0) On the picture index of chosen
> Kernel is 2
>
> 4.
>
> Start system. This action is for one boot on concrete kernel. If
> you want to start from concrete Kernel all time you should do next
> steps:
>
> 4.1. Open and edit GRUB setup file:
>
> |sudo nano /etc/default/grub |
>
> 4.2. Find line GRUB_DEFAULT=...(by default GRUB_DEFAULT=0) and sets in
> quotes menu path to concrete Kernel(Remember menu indexes from steps 2
> and 3). In my system first index was 1 and second was 2. I set in to
> GRUB_DEFAULT
>
> |GRUB_DEFAULT="1>2" |
>
> Save file.
>
> 4.3. Update GRUB information for apply changes:
>
> |sudo update-grub |
>
> 4.4. After reboot you automatically boot on Kernel by chosen menu
> path. An example on my machine 1 -> 2
>
> 4.5. Check Kernel version after reboot:
>
> uname -r
>
> *Sent:* Thursday, April 18, 2019 at 10:54 PM
> *From:* "Brian O'Keefe" <okeefe at cybermesa.com>
> *To:* nmglug at lists.nmglug.org
> *Subject:* Re: [nmglug] Weirdness
>
> Thanks again,
>
> Tried them all to no avail
>
> On 4/15/19 6:33 PM, Harold Furbiter wrote:
>
> You could try:
> sudo /sbin/init 6 (see if it reboots)
>
> reboots to a blank, colored screen, no log in
>
> sudo /sbin/init 1 (see if it give you a prompt)
>
> Gives me a rescue mode prompt that I cannot use as I can't enter any
> of the options
>
> maybe su to root and try init
> sudo su - root (you need '- root' to insure your path is root's)
> you might try booting from a older or oldest kernel:
>
> Can't access the grub menu for older kernels. Using shift key during
> boot just gives me the blank colored screen
>
> dpkg -l | grep linux-image | awk '{print$2}'
> Gives you a list of bootable kernels available on your system. Try
> booting from the oldest version.
>
> Is there a way to reboot from a terminal with an older kernel as I
> cannot access the grub menu. this is a recent issue, within the last
> couple of weeks.
>
> Cheers,
> *Sent:* Saturday, April 13, 2019 at 8:32 AM
> *From:* "Harold Furbiter" <wwcorigan at mail.com>
> *To:* nmglug at lists.nmglug.org
> *Subject:* Re: [nmglug] Weirdness
> Then you have a corrupt kernel. On boot try booting to an older
> kernel.
> https://askubuntu.com/questions/82140/how-can-i-boot-with-an-older-kernel-version
> *Sent:* Friday, April 12, 2019 at 6:15 PM
> *From:* "Brian O'Keefe" <okeefe at cybermesa.com>
> *To:* nmglug at lists.nmglug.org
> *Subject:* Re: [nmglug] Weirdness
>
> Thanks for the input Harold,
>
> Same result, just hangs on the splash screen. Can't logout, esc.
> key does nothing, can't switch to a console. Just have to do a
> hard shutdown.
>
> On 4/11/19 8:59 PM, Harold Furbiter wrote:
>
> Out of curiousity have you tried init 0 ?
> *Sent:* Wednesday, April 10, 2019 at 11:26 AM
> *From:* "Brian O'Keefe" <okeefe at cybermesa.com>
> *To:* "NMGLUG.org mailing list" <nmglug at nmglug.org>
> *Subject:* [nmglug] Weirdness
>
> Hi All,
>
> Since I may not make meeting (niece visiting and Thurs. is her
> last day) I'm putting my issue out for comment and hopefully
> answers. As many of you know I used to updgrade instead of
> clean installs and did that since Ubuntu 6.04. I had also
> added many apps from third parties and also modified many,
> many conf files to keep things working. I had a meltdown and
> lost much of my data but following a partial recovery, thanks
> to a certain group member, I installed a clean version of
> 18.04 onto a new 1TB SSD. I have ot tinkered at all with 3rd
> party software nor modified any conf files or been a bad boy
> in any way!
>
> My issue ids that I cannot shut down my box in anyway other
> than a hard shutdown. I also cannot restart it. I have tried
> the GUI option as well as switching to text mode and using
> "sudo shutdown now" or "sudo restart now". In those cases I
> get the splash screen with the "traveling lights" and Unutu
> but it hangs there. The traveling dots hang on the first dot
> of the splash screen and nothing happens. I had hoped that
> text mode would give give me an indication of the issues but I
> can't stay in that mode for some reason.
>
> Thanks for any help.
>
> Brian
>
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