[Tfug] Ubuntu Gutsy Compiling Kernel

Sat Oct 27 22:44:30 MST 2007

So...the tulip driver doesn't work then I take it?

On 10/27/07, Andrew Ayre <andy at britishideas.com> wrote:
>
> Hi Jude,
>
> I appear to have solved the problem, although it's not a solution I
> particularly like.
>
> I followed your suggestion and searched for problems with Davicom
> DM9102AF cards and Linux. I found a few people with problems, and tried
> a few ideas, but none worked.
>
> So I finally swapped my NIC for a 9 year old Realtek RTL8139 that I had
> from a Win98 box. Now eth0 appears to work. Yay.
>
> Incidentally the stock Gutsy kernel and my vanilla kernels were loading
> the exact same version of the Davicom driver, so I am guessing that
> something doesn't work properly in the kernel and the Ubuntu team knew
> how to fix it in their custom kernel.
>
> This wasted about a week of my spare time. It reminds me of my second
> biggest waste of spare time with computers - spending four days trying,
> and failing, to install a CDROM drive in my brother-in-law's Mac running
> System 7 or MacOS 8 (can't remember which).
>
> Andy
>
> Jude Nelson wrote:
> > What is the chipset of your NIC?  You may have to supply the vanilla
> kernel
> > a chipset-specific patch as well as the RTAI one.
> >
> > I'm not sure the RTAI patch will work with 2.6.23 as well as
> > 2.6.22.xx...theCompletely Fair Scheduler in
> > 2.6.23 I heard hampers the ability to have real-time responses from the
> > kernel, because the CFS distributes CPU time to all processes equally
> (and
> > there isn't a config option to turn it off).
> >
> > Kind Regards,
> > Jude Nelson
> >
> > On 10/25/07, Andrew Ayre <andy at britishideas.com> wrote:
> >> Hi Jude,
> >>
> >> Thanks for the reply. Here is the problem though:
> >>
> >>   - with the Ubuntu version of the kernel, the kernel won't compile
> with
> >> the RTAI patch
> >>
> >>   - with the vanilla kernel ethernet doesn't work for some reason
> >>
> >> I am patching version 2.6.22.9 with the RTAI 2.6.22.9 patch. When I did
> >> a diff between the vanilla kernel and the Ubuntu kernel, there are a
> lot
> >> of changes.
> >>
> >> The RTAI documentation recommends only patching vanilla kernels.
> >>
> >> My only thought at this point is to give the vanilla 2.6.23 a try, but
> >> that takes me even closer to the bleeding edge...
> >>
> >> Any suggestions on how to proceed? I looked at the syslog after booting
> >> with the vanilla kernel and didn't see anything obviously wrong.
> >>
> >> Thanks for the help!
> >>
> >> Andy
> >>
> >> Jude Nelson wrote:
> >>> To find out how to kernels differ, get the vanilla one and the Ubuntu
> >> one
> >>> and do this:
> >>>
> >>> diff -u /path/to/vanilla/kernel /path/to/Ubuntu/kernel >
> >>> /path/to/convenient/patchfile
> >>>
> >>> That'll give you a source patch file that will contain all the patches
> >>> applied to the Ubuntu kernel from the vanilla.
> >>>
> >>> To set up RTAI, you'll need to know what kernel version(s) the RTAI
> >> patch in
> >>> question requires.  Just grab the one you want and the corresponding
> >>> kernel.  Unpack the kernel, cd into the kernel's root source
> directory,
> >> and
> >>> execute this command*:
> >>>
> >>> patch -Np1 < /path/to/RTAI/diff
> >>>
> >>> (fill in the blanks as needed).
> >>>
> >>> *If you want to add Ubuntu's patches to the vanilla kernel, then apply
> >> the
> >>> patch you created above BEFORE the RTAI diff.
> >>>
> >>> Now, do a make menuconfig to load in the config options (you don't
> need
> >> to
> >>> feed it the Ubuntu kernel config--the script is smart enough to do
> that
> >>> itself).
> >>>
> >>> If you don't feel like looking through all the options, just abort and
> >> have
> >>> a look inside the .config file in the root directory of the kernel.
> >>> Somewhere, there should be an RTAI option.  You may need to enable it
> >>> manually.  Chances are, the CONFIG_xxx key/value pair will have the
> >> string
> >>> "RTAI" in there somewhere, so you can easily use vi to locate it.
> >>>
> >>> After that, just a "make-kpkg --initrd --bzimage kernel_image
> >> modules_image"
> >>> command should create a kernel deb and any additional out-of-tree
> >> modules
> >>> you may need (you'll need module-assistant, fakeroot, make-kpkg, etc.
> to
> >> do
> >>> this).  If you don't want an initrd, then omit the "--initrd" option.
> >>>
> >>> Hope this helps,
> >>> Jude
> >>>
> >>> On 10/25/07, Glen Pfeiffer <glen at thepfeiffers.net> wrote:
> >>>> I don't have any answers, but am posting this to start it as a new
> >> thread.
> >>>> -- andy at britishideas.com wrote:
> >>>>> I'm running Ubuntu 7.10 Gutsy on my desktop PC and I want to patch
> the
> >>>>> kernel with RTAI. However my knowledge of patching and kernels is
> >>>>> limited... Here is what I tried:
> >>>>>
> >>>>> I grabbed the Linux source from the Ubuntu gutsy repos and found it
> to
> >>>>> be 2.6.22.9. I built it and installed the package and it worked
> fine.
> >> I
> >>>>> used /boot/config-2.6.22-14-generic as the .config file.
> >>>>>
> >>>>> Next I grabbed 2.6.22.9 from kernel.org. I built it in the same way
> >> and
> >>>>> installed the package. It works except Ethernet is broken. I again
> >> used
> >>>>> /boot/config-2.6.22-14-generic as the .config file.
> >>>>>
> >>>>> In both cases I didn't configure the kernel - I simply built it.
> >>>>>
> >>>>> So I am assuming that something was patched in the Ubuntu version to
> >> fix
> >>>>> some kind of problem.
> >>>>>
> >>>>> eth0 appears to be ok, but there are no packets in or out.
> >>>>>
> >>>>> Does anyone have any pointers on how do I find out what patch is
> >> missing
> >>>>> from my vanilla kernel? It seems Gutsy ships with 2.6.22.14, but
> >> nothing
> >>>>> beyond 9 is available from kernel.org. So I'm guessing the Ubuntu
> team
> >>>>> made a few revs of their own.
> >>>>>
> >>>>> I posted on ubuntuforums.org but haven't received any replies on
> this.
> >>>>>
> >>>>> thanks, Andy
> >>>>>
> >>>>> -- Andy
> >> --
> >> Andy
> >> PGP Key ID: 0x67090A54
> >>
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> >
> >
>
> --
> Andy
> PGP Key ID: 0x67090A54
>
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