On Wed, 23 Sep 2009, Attilio Rao wrote: > 2009/9/23 Daniel O'Connor <[email protected]>: > > If I enable the parallel port on this Gigabyte MA7785GM-US2H I get > > a trap 12 when booting up. > > > > I forgot to take a picture of it at the time but I should be able > > to reproduce it tomorrow. > > > > Has anyone seen anything before? (a quick google showed nothing). I > > did not see it on 7.2(ish) on the same hardware. > > Are you able to enable KDB in your kernel config and return a > backtrace here?
Yes, here it is.. pmap_extract() at pmap_extract+0x13a isa_dmarangecheck() at isa_dmarangecheck+0x7a isa_dma_init() at isa_dma_init+0xda ppc_isa_attach() at ppc_sa_attach+0x40 device_attach() at device_attach+0x69 bus_generic_attach() at bus_generic_attach+0x1a acpi_attach() at acpi_attach+0x9f8 (there's more but I imagine the above is probably sufficient). I took pictures, they are here http://www.gsoft.com.au/~doconnor/SNC00111.jpg http://www.gsoft.com.au/~doconnor/SNC00112.jpg If I put the parallel port in EPP mode then it works, I presume that's because it doesn't require a DMA channel whereas ECP doesn't. I haven't enumerated the possibilities though :) -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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