Messages in this thread |  | | Date | Wed, 22 Aug 2001 19:35:23 +0200 | From | (Gunther Mayer) | Subject | Re: yenta_socket hangs sager laptop in kernel 2.4.6-> PNPBIOS life saver |
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Gerd Knorr wrote: > > In lists.linux.kernel, you wrote: > > Hello! > > > > > Same problem here. I've spend some time today to figure what is going > > > on. Workaround: > > > - min = PCIBIOS_MIN_IO; > > > + min = 0x4000 /* PCIBIOS_MIN_IO */; > > > > I do not know how to thank you... You saved my life. :-) > > How did you guess this? > > Long trial-and-error session. Deactivate code and see if it still does > crash to narrow down the code lines which trigger the lockup. Once I've > figured that enabling the I/O-Windows triggers the lookup the guess was > easy ... > > > > Looks like a ressource conflict to me. The kernel gives I/O ranges to > > > the cardbus socket which it thinks are free but which are *not* free for > > > some reason (and probably used for APM stuff). BIOS bug? PCI quirks > > > time?
Longstanding Linux Bug: "ignore a _seven_ year old standard called PNPBIOS".
> > > > The same hardware is here, Mitac M722. :-) BTW what bios is installed > > on your one? > > "SYSTEM BIOS R1.02" > > > Anyway, Windows with the _same_ bios manages to guess and to reserve > > a few of ports tagged as some obscure "motherboard resources": > > 230-233, 398-399, 4d0-4d1, 1000-103f(!), 1400-140f(!) and 3810-381f. > > yenta_socket eats ones marked with !. At least 1400 is really critical, > > it is interface to SM mode. > > 0x1000 is critical too. Activating the first I/O window only is enough > to hang the notebook on any APM activity.
PNPBIOS _easily_ resolves this problem !
Try -ac Kernels with integrated PNPBIOS and "lspnp -v", then you will see your "motherboard resources". No magic.
Note: Linux currently does _not_ yet reserve these resources automatically (although I think the standalone pcmcia package has such an option).
By confirming (and posting your lspnp results) you could encourage some developers to rectify this situation :-)
Alan, 2.4 would largely benefit from PNPBIOS, do you plan to submit this to LT (probably with the proposed life saver fix) ?
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