<div dir="ltr"><div>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).</div><div><br></div><div>More detail:</div><div><br></div><a href="http://alblue.bandlem.com/2011/07/git-tip-of-week-git-bisect.html">http://alblue.bandlem.com/2011/07/git-tip-of-week-git-bisect.html</a><br></div><div class="gmail_extra"><br><div class="gmail_quote">On 14 February 2015 at 12:57, Liam Proven <span dir="ltr"><<a href="mailto:lproven@gmail.com" target="_blank">lproven@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 14 February 2015 at 02:59, Chris <<a href="mailto:cpollock@embarqmail.com">cpollock@embarqmail.com</a>> wrote:<br>
> Who can give me some pointers on doing a kernel bisection on either<br>
> 3.13.0-35 or -36 kernels? Ever since one of those two were installed,<br>
> I'm on -45 now, my system will lockup (black screen, cursor moves, but<br>
> CTRL-ALT-F1 will not take me to a terminal log-in. This is the error I<br>
> see - Feb 13 19:05:22 localhost kernel: [807775.808019]<br>
> [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... render<br>
> ring idle. I've reported this last year on Launchpad as bug -<br>
> <a href="https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1402331" target="_blank">https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1402331</a> I've jumped<br>
> through all the hoops that have been suggested there except doing a<br>
> kernel bisection which seems to have me confused. I'm really getting a<br>
> bit tired of these continued 'lockups'.<br>
<br>
<br>
</span>I have to ask. WTF is a "kernel bisection"?<br>
<br>
You want to... cut your kernel in half? Is this some kind of Solomonic<br>
judgement? Because, you know, like half a baby doesn't work, half a<br>
kernel won't, either.<br>
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