Nitto,
I don't know how easy it is to move between versions, but you may prefer
using an algorithm like this:
Starting with revisions from 1 to 90 to check,
startrevision=1
finalrevision=90
while startrevision < finalrevision
If revision startrevision don't has the bug
If revision finalrevision has the bug
middle=(startrevision+finalrevision)/2
if revision middle has the bug
startrevision=middle+1
finalrevision=finalrevision-1
else (middle don't has the bug)
startrevision=startrevision+1
finalrevision=middle-1
It's commonly used in programming, but also very easily applicable in
real life. It will help you find quickier with what revision the problem
started. Oh, my description of the algorithm should have some bugs, but
I'm trusting that you're human and will not get into an infinite loop :P
Just to make it clearer: divide the area of your search by two, check if
the middle element of it has the bug, if it has it, it should have
started in the first half, if not, it should have started in the second
half. Then, repeat the procedure.
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System freezes during boot, unless I hold a key down
https://bugs.launchpad.net/bugs/272247
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