[ivtv-users] reboots with kernel > 2.6.22

[Jeroen Roos]

Andy Walls wrote:
> 1. Find that latest kernel that still works and the earliest kernel that
> does not. 
> 
> A binary search will terminate in a few trials, e.g. .30, .26, .24, .23.
> (I suspect this could be painful on a Gentoo system, if you have to
> rebuild each kernel.)
I have done this in the past, unfortunately not down to patchlevel, but
I have found that linux-2.6.22-gentoo-r8 works and
linux-2.6.23-gentoo-r3 not. I have just booted from the first and did
not have the reboot issue there. Unfortunately I no longer have a
compiled version of the .23 release, and I cannot compile them anymore
since they cannot be compiled with gcc 4.3

> 2. Diff the source tree of the two kernels.

video src # diff -r linux-2.6.22-gentoo-r9 linux-2.6.23-gentoo-r3 | wc -l
472301

....mmmmm little bit too much

> 
> 3. Analyze the diff for the change that may have caused the problem.
> 
> That will narrow the cause down from "anything" to "one of these
> changes".  That changeset still could be rather large.

Indeed, but if I just check the ivtv part, it goes down:

video ~ # cd /usr/src/linux-2.6.22-gentoo-r9/drivers/media/video/
video video # diff -r ivtv
/usr/src/linux-2.6.23-gentoo-r3/drivers/media/video/ivtv | wc -l
556

Also, a reasonable part of that is changes in comments and printed text.

I think it's a bit too big to include in or attach to the mail, but for
anyone interested, there's a unified diff (diff -uN) at
http://thuis.tuxinet.nl/ivtv.patch.


Jeroen