Comparing other distros kernels to Fedora.

[Rodd Clarkson]

On Wed, Oct 13, 2010 at 6:46 AM, Adam Williamson <awilliam at redhat.com>wrote:

> On Tue, 2010-10-12 at 21:39 +1100, Rodd Clarkson wrote:
>
> > I've downloaded the Ubuntu 10.10 LiveCD which uses kernel 2.6.35 and
> > suspend and resume works fine in Ubuntu too.
> >
> > What difference in the Fedora kernels could be causing this problem?
>
> One more triaging step I'd recommend is to try an upstream kernel of the
> same vintage. If that works, you know that some change Fedora adds is
> breaking it. If it doesn't work, you know that Ubuntu and SUSE both have
> a patch that Fedora doesn't which fixes it.
>
> (I suspect this may come down to graphics code; Fedora generally carries
> rather newer upstream versions of intel, nouveau and radeon than other
> distros, and these can introduce regressions).
>

I'm pretty confident that I've tried every f13 kernel that's been through
koji.  If I haven't, I've come close.

I've also tried all the 'released' f14 kernels along with a couple of others
(I'm still to try the two kernel suggestions above, I'm downloading Kyle's
now and will rebuild the kernel if needed).

Early in F13's move to 2.6.34 there was another bug that caused issues with
suspending the system.  This was resolved, which revealed problems with
resuming from a suspend (which seems to have worked properly).

So, it's hard to tell if this bug was in the first 2.6.34 kernel for f13 or
not.


>
> > I know it seems strange to some, but suspend and resume are one of the
> > most important features for me on my laptop.  I can (and have) put up
> > with (a lot) less than optimal video, no sound and even wireless
> > network issues, but without a functioning suspend and resume it's
> > quite arduous having to wait for a system to shutdown and reboot.
> > Each to their own I guess, but I'd really like this to work and it
> > appears that it does work on other distros which makes me wonder what
> > Fedora isn't doing right.
>
> It's not strange, suspend/resume is critical to most laptop users. It's
> just pretty hard to diagnose and fix.
>

I'm aware of this which is why I'm trying to supply as much information as
possible to the kernel developers to try and rectify this problem I have.
It may be that isn't not actually the kernel, but some other related part of
the software stack, but I wouldn't know where to start looking.


R.



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