Date: 27 Apr 2004 19:59:38 -0400 From: Lowell Gilbert <freebsd-current-local@be-well.ilk.org> To: freebsd-current@freebsd.org Subject: PCI bus power problems (can't turn it off) Message-ID: <44vfjlkm51.fsf@be-well.ilk.org>
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I have
set hw.pci.do_powerstate=0
in my loader.conf, but the power state code is keeping my system from
recognizing my PC cards anyway.
The dmesg output in this state is attached.
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Content-Disposition: attachment; filename=laptop-problems.html
Content-Description: dmesg output for HP Omnibook XE2
MIME-Version: 1.0
Content-Type: text/plain
Latest
I've got my Omnibook running -CURRENT, by booting from floppies, and
then copying the install kernel over from the floppies after the
install was complete. The AGP problems are definitely a bug in the
laptop, and there doesn't seem to be anything I can do about that.
ACPI isn't working, either, but that's common for older laptops.
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introduction
The most basic problem I'm seeing is that the agp device keeps the
thing from booting. agp is now in the GENERIC kernels, so that's a
real problem. I've bootstrapped the system up from an earlier release
(4.6.2), so it's running okay now, but I'm still working on figuring
out the AGP problem.
What actually happens?
pcib0: port 0xcf8-0xcff on acpi0
pci0: on pcib0
agp0: mem 0-0x3ffffff at device 0.0 on pci
and it locks up there for good.
hardware
This is an [1]HP Omnibook XE2 and its revision is what HP calls "dd".
[Sorry; actually HP calls that a "technology code."]
Kernel debugging
I'm having problems with debugging the kernel on this. It has to be
done from boot, because the agp functionality can't be loaded later
(according to the documentation, anyway; I haven't tried it). When I
do try, the kernel debugger can't seem to find any symbols. What I did
to get there was:
1. add "options DDB" to the kernel configuration
2. "config -g <configuration>"
3. interrupt the loader, "unload kernel", load the debug kernel in
its place, and "boot -d"
4. at the "DB>" prompt, type "b agp_find_caps" (and get a
symbol-not-known error for my trouble)
Late addition(30/Apr) I've got what seems to be a good debugging
kernel, but I get the "DB>" prompt repeating endlessly (as if the
return key were being hit continuously).
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last modified: 8:33pm, Wednesday, 11 Feb 2004 by Lowell Gilbert.
References
1. http://h20015.www2.hp.com/en/document.jhtml?lc=en&docName=bpi03425
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