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SubjectToshiba PCToPIC97 PC Card freeze in 2.4.18

I'm at my wit's end. I have a Toshiba Satellite 2545XCDT which has a PC
Card adapter. I have been happily running this laptop with a 2.2.16 kernel
without problem. Today, when trying to upgrade to a 20GB hard disk and a
2.4.18 kernel, the box would freeze when trying to start the PCMCIA
service. Here is the message that I get on the screen:

PCI: No IRQ known for interrupt pin A of device 00:13:0. Please try using
PCI: No IRQ known for interrupt pin B of device 00:13.0. Please try using
Yenta IRQ list 06b8 PCI irq 0
Socket status: 30000007

and the system is completely frozen at that point -- even CTRL-ALT-DEL
doesn't work. (The soft power switch does, which tells me that NMI
interrupts get through, but nothing else.) As you might guess, SysRq
didn't work, either. Only powering off would allow me to restart the system.

When I recompile the kernel to not make PCMCIA a module, there is NO
message, just the system freeze.

Nothing interesting shows up in syslog.

Probing the /proc filesystem, I find that under 2.2.16 there is a character
device 254 labeled PCMCIA; in the 2.4.18 kernel I see no device 254 or any
device with the label PCMCIA. Granted, in the case of 2.2.16 the various
modules successfully loaded, so they may have advertised device 254,
whereas on the 2.4.18 kernel the failure kept the device from being advertised.

Dumping /proc/pci, I see device 19 (0x13) listed but completely different
capabilities advertised. Under 2.2.16, I see "Slow devsel. Fast
back-to-back capable. Master Capable. No bursts. Min Gnt=128.Max
lat=4." The same device under 2.4.18 reports "Non-prefetchable 32 bit
memory at 0x100000000 [0x100000fff]." Other PCI devices have reports that
differ in format but not significantly in the amount of and values in content.

I even went so far as to download the latest version
(pcmcia-cs-3.1.34.tar.gz) of the PCMCIA stuff from SourceForge, compiled it
all, and ended up with exactly the same results. So I'm beginning to
believe that it's not the PCMCIA/PCCard software.

I checked the kernel archives for any mention of this problem, and the
closest I could find was a complaint regarding an IBM ThinkPad. Ditto
checking the bug list for the project on SourceForge. Nothing on Toshiba

I put the old hard drive back into the laptop so I can get some work done,
but I still have all the stuff on the new drive.

The distributions involved are Red Hat 7.0 and Red Hat 7.3.

Where to "try using pci=biosirq"? I tried adding it to the boot sequence,
with no result.

I'm stumped. Any suggestions where to start looking?

Stephen Satchell

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