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Old 02-16-2012, 04:37 PM
Jonathan Nieder
 
Default Bug#490694: Extra video card seems to be the problem

severity 490694 normal
quit

Jeffrey Green wrote:

> I have a yes and no answer for you. Yes, I'm not sure whether the
> problem still exists and consequently am assuming it does. And no
> since unfortunately my powermac is not hooked up right now and
> cannot easily be set up since I'm without monitor for the time
> being. I'm living from a laptop at the moment. If I could get my
> hands on a monitor, then I'd be willing to set it up (and track down
> my extra graphics card that I had removed from the system to get it
> to work).

Hm, thanks.

> One little piece of into that I'm not sure I gave previously is that
> I think this problem, or a very similar one, appeared in the circa
> 2002 time frame.

Oh, that's interesting.

[...]
> One fact is, it did break, it was graphics card related, and
> modifying the kermel "fixed" it.

Was your fix applied upstream, or was it a local workaround?

[...]
> So, I'm not sure if I've helped in terrms of what to do with this
> bug (at this moment). If you'd really like to get to the bottom of
> the issue, then I might (just might) be able to track a monitor down
> for some testing purposes.

It's up to you. I'd certainly like to get to the bottom of crashy
bugs like this to make the behavior of the kernel more predictable and
change the slope of the following graph:

http://qa.debian.org/data/bts/graphs/l/linux-2.6.png

but ultimately, you would be doing the work of testing patches if
upstream comes up with any. If you don't want to pursue this, one
possibility might be to document what we know somewhere under
Documentation/powerpc/ and forget about it until the next person hits
this.

Thanks,
Jonathan



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Old 02-20-2012, 07:21 PM
Jonathan Nieder
 
Default Bug#490694: Extra video card seems to be the problem

tags 490694 - moreinfo
found 490694 linux-2.6/2.6.25-6
found 490694 linux-2.6/2.6.26-11
tags 490694 + upstream
# 2.6.29-rc1, but close enough
found 490694 linux-2.6/2.6.28-1
quit

Jeffrey Green wrote:
>>> On Feb 16, 2012, at 12:37 PM, Jonathan Nieder wrote:
>>>> Jeffrey Green wrote:

>>>>> One fact is, it did break, it was graphics card related, and
>>>>> modifying the kermel "fixed" it.
>>>>
>>>> Was your fix applied upstream, or was it a local workaround?
[...]
> Nope. It was purely local at that point. I was still exploring linux
> at that point (when I had the time), Somewhere around Jan of 2000
> was my first connection. Lots of Unix experience but no linux.
> Consequently, I wasn't really plugged into all of the various
> developer mechanisms that existed. I should have known about them
> but either didn't have the time or inclination (or some combo of
> both) to work my way through the muck.
>
> I'm such a pack rat that I could probably track down a vestige of
> those kernels although the times when I needed to do mass hard disk
> transfers or rebuilds may foil me in that attempt.

If you do remember anything about that patch, it could certainly be an
interesting clue.

Anyway, I'll send any further questions to the upstream report[1].
It will be nice if we can figure this one out.

Thanks for the quick feedback.
Jonathan

[1] https://bugzilla.kernel.org/show_bug.cgi?id=12436



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Old 02-25-2012, 12:03 AM
"Jeffrey B. Green"
 
Default Bug#490694: Extra video card seems to be the problem

On Mon, 20 Feb 2012 14:21:24 -0600
Jonathan Nieder <jrnieder@gmail.com> wrote:

>
> Anyway, I'll send any further questions to the upstream report[1].
> It will be nice if we can figure this one out.
>

Well, I got a new flat-screen and hook it up, and it seems to work with
both cards in the machine.

Here are the particulars:

% uname -a
Linux naro 2.6.32-5-powerpc #1 Mon Jan 16 16:36:52 UTC 2012 ppc
GNU/Linux

% lspci -tv
-+-[0002:21]-+-0b.0 Apple Computer Inc. UniNorth Internal PCI
| -0f.0 Apple Computer Inc. UniNorth GMAC (Sun GEM)
+-[0001:10]-+-0b.0 Apple Computer Inc. UniNorth PCI
| -0d.0-[11]--+-02.0 Adaptec AIC-7850
| +-04.0 ATI Technologies Inc Rage 128 RE/SG
| +-07.0 Apple Computer Inc. KeyLargo Mac I/O
| +-08.0 Apple Computer Inc. KeyLargo USB
| +-09.0 Apple Computer Inc. KeyLargo USB
| -0a.0 Texas Instruments TSB12LV23 IEEE-1394
Controller -[0000:00]-+-0b.0 Apple Computer Inc. UniNorth AGP
-10.0 ATI Technologies Inc Rage 128 PF/PRO AGP 4x TMDS

So far nothing has shown up regarding the earlier fix I did to get the
2.2 or maybe 2.4 kernel to work when I had a similar problem with it.
I'll keep looking.

Let me know if you want to try anything.

-jeff



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