Did you try a -current kernel with PCIBIOS enabled?

		David/absolute

On Tue, 22 Feb 2000, Duncan McEwan wrote:

> Is anyone successfully running NetBSD on one of these laptops.
> 
> When I try booting (either 1.4.1 or an almost -current of early Feb) off
> the install flopp{y,ies} the devices seem to be probed correctly but then
> system system wedges sometime before sysinst starts up.
> 
> I built an install floppy with DDB enabled but once it has wedged,
> <ctrl-alt-esc> doesn't drop me into DDB.
> 
> Next I tried setting breakpoints at various places through main() to see if I
> could narrow down where it was hanging.  Unfortunately, when I did this, the
> system got all the way to uvm_scheduler() at which point I gave up on that
> strategy.  A couple of times when I did this it actually got as far as starting
> sysinst before wedging.  Does this suggest some kind of timing problem (perhaps
> associated with the enabling of interupts?).  I'm not sure what I can do next
> to track it down further.
> 
> There are a couple of issues relating to Thinkpads mentioned in the FAQ but
> I don't think either apply here (I'm happy to be corrected on that though!)
> 
> One is that the apm(4) manual page says that APM_DISABLE_INTERRUPTS needs to be
> set to 0 in the kernel config for "most IBM ThinkPads".  Well, the INSTALL
> kernel doesn't have apm turned on so I don't think this should be a problem
> (especially since the reported problem this corrects is that wakeups from
> suspend fail - which is not my problem).  But just to be safe, I built an
> INSTALL kernel with "apm0 at mainbus0" uncommented and also included "options
> APM_DISABLE_INTERRUPTS=0".  It didn't make any difference.
> 
> The other issue I know about is setting PCIC_ISA_INTR_ALLOC_MASK to an
> appropriate value to make sure that the correct interupts get allocated to
> pccard devices.  But my problem isn't with getting pccards recognised
> correctly.
> 
> I believe this laptop has some kind of Cyrix CPU and I recall reading about
> problems with the cache with some Cyrix CPU's.  So I looked through the bios
> setup (ctrl-alt-f11 - thanks to someone on this list!) to see if I could turn
> some cache options off, but didn't see anything useful.
> 
> Does anyone know of any other issues that affect older ThinkPads that might
> result in these symptoms.
> 
> Duncan
> 
> PS: I had given up on getting NetBSD on this laptop, but then it's owner tried
> a FreeBSD boot floppy with their experimental PCMCIA support and it worked.  So
> now I feel I need to defend the hono{u,}r of NetBSD... :-)
>