On Fri, 7 Nov 2014 00:54:31 +0100 devz...@web.de wrote: > Hi, > > on an ancient GX1 Geode embedded board (Evo T20/Wyse wt3235le Thin Client, > which are cheap (<$10) and low power x86 embeded platform) , dmesg is getting > constantly spammed with "PnPBIOS: pnp_dock_thread: unexpected status 0x5" > during and after boot. > > Any ideas what this means and how to stop that? > > It seems it comes from drivers/pnp/pnpbios/bioscalls.c -> > pnpbios_print_status() > > Tried adding pnpbios=off, but with that the system does not boot anymore. > > Being curious, why a non-existing docking-station is being "polled at regular > intervals" (i.e. every 2 seconds - see drivers/pnp/pnpbios/core.c )
We poll for a dock, and if the BIOS reports that the function is not supported we then exit the thread. > > >From > >http://books.google.de/books?id=ibLa4I5EnC4C&pg=PA231&lpg=PA231&dq=pnp+docking+bios&source=bl&ots=ekCFm34U_B&sig=9Z9L55IAL7_3NtuM10jT3serncM&hl=de&sa=X&ei=mAZcVILnJsviO-r5gNgI&ved=0CCsQ6AEwAQ#v=onepage&q=pnp%20docking%20bios&f=false > > i read: "Function 05h - Get Docking Status Information at page 251" The spec is available at: http://download.intel.com/support/motherboards/desktop/sb/pnpbiosspecificationv10a.pdf > it seems this is being the result of a "docking event" ? Does this mean, my > system is erroneusly generating such docking events, even if there is no > docking station at all? Your BIOS appears to be making strange replies. Any error ought to have the top bit set, so its reporting a nonsense value for some reason. I've not seen other reports of pnp_dock_thread errors with a real dock. The only reports at all are a couple of old ones in google that seem to be similar and a Debian bug (294652) which appears to be your bug so I'd suggest testing the following Change the default to default: pnpbios_print_status("pnp_dock..... etc) printk(KERN_ERR "PnPBIOS: Disabling dock monitoring\n"); complete_and_exit(&unload_sem, 0); that should produce you one error message, a warning that dock monitoring is being disabled and then it should stfu. If you can let us know if that does the trick then I can push it upstream. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
