Bug 15436

Summary:	PCI card inserted in Thinkpad Dock II docking station not visible
Product:	Drivers	Reporter:	laramichaels1978
Component:	PCI	Assignee:	drivers_pci (drivers_pci)
Status:	RESOLVED OBSOLETE
Severity:	normal	CC:	alan, laramichaels1978, rui.zhang
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.31	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	dmesg with pci=assign-busses lspci -vvv with pci=assign-busses output of acpidump

Description laramichaels1978 2010-03-03 16:33:31 UTC

Hello,

This might be related to these earlier reports on the LKML

http://lkml.indiana.edu/hypermail/linux/kernel/0607.0/1409.html

http://lkml.indiana.edu/hypermail/linux/kernel/0901.1/00438.html

On a Thinkpad Dock II, there is a PCI video card system which is not visible on my Linux system. (I have tested the card on an old desktop and it is detected.)

I am attaching the output of dmesg, lspci -vvv and acpidump. Notice that in the second of these I can see the docking station itself; like in the second problem report quoted above, the card itself doesn't show up in lspci, though.

Thanks for any time you can devote to this,

lara

Comment 1 laramichaels1978 2010-03-03 16:35:17 UTC

Forgot to mention: based on information online, I have tried booting with acpi=off, pci=assign-busses, pci=routeirq, pci=noacpi and pci=nobios to no avail.

Comment 2 laramichaels1978 2010-03-03 16:36:02 UTC

Created attachment 25340 [details]
dmesg with pci=assign-busses

Comment 3 laramichaels1978 2010-03-03 16:36:36 UTC

Created attachment 25341 [details]
lspci -vvv with pci=assign-busses

Comment 4 laramichaels1978 2010-03-10 20:34:45 UTC

Created attachment 25459 [details]
output of acpidump

Comment 5 Bjorn Helgaas 2010-03-11 19:56:55 UTC

[[Ugh, I fat-fingered the [Bug 15436] in the subject, so the last one
went to the wrong bugzilla.]]
[Updating this thread with the bugzilla pointer and my current theory]

http://bugzilla.kernel.org/show_bug.cgi?id=15436

I first thought this was an ACPI or dock problem, but I now think
this is a PCI issue after all, since the machine was booted in the
dock and no dock/undock events are involved.

From this lspci output:

  00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 81)
	Bus: primary=00, secondary=02, subordinate=13, sec-latency=64
	I/O behind bridge: 00004000-00009fff
	Memory behind bridge: c0200000-cfffffff
	Prefetchable memory behind bridge: e8000000-efffffff

  02:03.0 PCI bridge: Texas Instruments PCI2032 PCI Docking Bridge (prog-if 01)
	Bus: primary=02, secondary=0b, subordinate=13, sec-latency=68
	I/O behind bridge: 00004000-00004fff
	Memory behind bridge: 84000000-8bffffff
	Prefetchable memory behind bridge: 8c000000-93ffffff

  0b:02.0 CardBus bridge: Texas Instruments PCI1420 PC card Cardbus Controller
	Bus: primary=0b, secondary=0c, subordinate=0f, sec-latency=176

  0b:02.1 CardBus bridge: Texas Instruments PCI1420 PC card Cardbus Controller
	Bus: primary=0b, secondary=10, subordinate=13, sec-latency=176

It looks like the dock PCI slot should appear as 0b:00 (as it does in the
report at http://lkml.indiana.edu/hypermail/linux/kernel/0607.0/1409.html).
We do see the CardBus bridges in the dock.  The fact that we don't see the
video card, which should be on the same bus, makes me suspect that the
dock's PCI slot is bad.