2009/9/24 Daniel O'Connor <[email protected]>: > 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 :)
Can you try to get a kernel dump that we can analyze? You would just need to recompile the kernel with options KDB, GDB and debugging symbols. Then we can do more on that. Thanks, Attilio -- Peace can only be achieved by understanding - A. Einstein _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[email protected]"
