Ah! Might change and probably will. Murphy and all his cousins are alive 
and well.
Thanks for the comment.

However, I update very sparsely....still running on a 1200 Duron and 
2.5? Clearly time to upgrade. ;-)
My goal is to consistently make chips.

Dave

On 01/05/2017 05:15 PM, Kurt Jacobson wrote:
> I found out the hard way that it is not a good idea to select the kernel
> numerically (e.g. GRUB_DEFAULT="2>3") since if another kernel is added (by
> an update?) the order might change.
>
> I now use the string method as below exclusively and have not had any
> surprises since.
> GRUB_DEFAULT="Previous Linux versions>Ubuntu, with Linux 3.4-9-rtai-686-pae"
>
> Kurt
>
> On Thu, Jan 5, 2017 at 3:32 PM, dave <dengv...@charter.net> wrote:
>
>> With  some help from Kent this turns out to be not too onerous.
>>
>> Boot your system and on the boot menu note which kernel you want ( by
>> number ) starting with 0.
>> Ditto if you are in the alternate menu.
>>
>> #modify /etc/default/grub
>>
>> $cd /etc/default
>> sudo vim grub
>> change GRUB_DEFAULT=0     to GRUB_DEFAULT="n"   or if in alternate menu
>> to GRUB_DEFAULT="2>n"
>> save and exit vim
>>
>> # or in main menu just GRUB_DEFAULT="count-1"
>> # in alternate menu = "line number of alternate menu in main
>> menu>count-1 in menu"
>>
>> #update grub.cfg
>> sudo update-grub
>>
>> #reboot
>> sudo shutdown -r now
>>
>> # or you can select the kernel like this by string.
>> #GRUB_DEFAULT="n>Ubuntu, with Linux 3.4-9-rtai-686-pae"
>> #where n is the entry you want (count -1).
>>
>> #For the original menu I think you can omit the n> and go with it.
>> #remember anytime you change /etc/default/grub you need  to update grub.
>> Don't ask me
>> #how I know.
>>
>> Now it is up to someone good with good documentation skills to make
>> certain this is understandable and get it into the docs.
>>
>> HTH
>>
>>
>>
>>
>> On 01/03/2017 04:43 PM, Sebastian Kuzminsky wrote:
>>> On 01/03/2017 04:47 PM, dave wrote:
>>>> Re:
>>>> http://linuxcnc.org/docs/html/getting-started/getting-
>> linuxcnc.html#_installing_on_ubuntu_precise
>>>> The instructions for the install are nicely done. I tried it both by
>>>> typing individual lines and  by enclosing the block of instructions in
>> {}.
>>>> Seemed to work either way but no joy on uname -r |  uname -a.
>>>>
>>>> Apparently grub does not get updated by the install and therefore one
>>>> boots into the ...generic.
>>>> I've pretty well worked my way thru  grub but need to weed the list to a
>>>> generic, generic(recovery) and
>>>> rtai.  Rtai comes up on a secondary list and I need to change that.
>>>>
>>>> Not complaining just a heads up. Nice to have it all laid out.
>>> If you figure out a clear way to describe the changes needed to the GRUB
>>> config, an update to the docs would be much appreciated!
>>>
>>>
>>
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