Kernel 'bisection'

[Chris]

On Sat, 2015-02-14 at 13:05 +0000, Peter Waller wrote:
> Briefly, bisection is a way of taking a long list of 1000's of
> changes, and arranging things so that you only have to test more like
> 10 of them, because you test midpoints. (and 2^10 ~ 1000).
> 
> 
> More detail:
> 
> 
> http://alblue.bandlem.com/2011/07/git-tip-of-week-git-bisect.html
> 
> 
> On 14 February 2015 at 12:57, Liam Proven <lproven at gmail.com> wrote:
>         On 14 February 2015 at 02:59, Chris <cpollock at embarqmail.com>
>         wrote:
>         > Who can give me some pointers on doing a kernel bisection on
>         either
>         > 3.13.0-35 or -36 kernels? Ever since one of those two were
>         installed,
>         > I'm on -45 now, my system will lockup (black screen, cursor
>         moves, but
>         > CTRL-ALT-F1 will not take me to a terminal log-in. This is
>         the error I
>         > see - Feb 13 19:05:22 localhost kernel: [807775.808019]
>         > [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer
>         elapsed... render
>         > ring idle. I've reported this last year on Launchpad as bug
>         -
>         > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1402331
>         I've jumped
>         > through all the hoops that have been suggested there except
>         doing a
>         > kernel bisection which seems to have me confused. I'm really
>         getting a
>         > bit tired of these continued 'lockups'.
>         
>         
>         I have to ask. WTF is a "kernel bisection"?
>         
>         You want to... cut your kernel in half? Is this some kind of
>         Solomonic
>         judgement? Because, you know, like half a baby doesn't work,
>         half a
>         kernel won't, either.
>         
That, to me, is as clear as mud just as these instructions on doing it
are - https://wiki.ubuntu.com/Kernel/KernelBisection I can't live with
having these 'lockups' every 2-10 days, more or less and I say that
because it's so very random I have no idea what even triggers it.


-- 
Chris
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