On Wed, 15 Apr 2009, Johannes Berg wrote: > On Wed, 2009-04-15 at 22:56 +0900, Mattia Dongili wrote: > > On Wed, Apr 15, 2009 at 03:34:39PM +0200, Johannes Berg wrote: > > > Recently, since I upgraded to -rc1, I've been seeing this at hibernate: > > > > > > [13875.384603] ACPI: Preparing to enter system sleep state S4 > > > [13875.385232] ACPI Error (hwvalid-0186): Denied AML access to port 0x0000000000000080/2 (DMA1 0x0081-0x0083) [20090320] > > > [13875.385745] ACPI Exception (evregion-0422): AE_AML_ILLEGAL_ADDRESS, Returned by Handler for [SystemIO] [20090320] > > > [13875.386244] ACPI Error (psparse-0537): Method parse/execution failed [\P8XH] (Node ffff88007e44ef70), AE_AML_ILLEGAL_ADDRESS > > > [13875.386896] ACPI Error (psparse-0537): Method parse/execution failed [\_PTS] (Node ffff88007e44edd0), AE_AML_ILLEGAL_ADDRESS > > > [13875.387584] PM: Saving platform NVS memory > > > > there are patches for this here: > > http://bugzilla.kernel.org/show_bug.cgi?id=13036 > > This should be the final one: > > http://bugzilla.kernel.org/attachment.cgi?id=20913 > > Does it help? > > Thanks, I'll give it a try later, but it seems like it would help to get > rid of the warnings, and the random delays I'm seeing are probably > something else. Agreed. The AML is doing a 2-byte write to port 80. Linux complains b/c we told it that port 81 is protected, and we throw away the write. However, port 80 is just the debug port, so I think that this blocking and this warning will have no effect on the function of your system. BTW. this message should be gone in 2.6.30-rc2, as we deleted the block for port 81 until we could figure out the path that we took in the bugzilla above. commit fdbdc7fc79c02ae4ede869d514179a2c65633d28 Author: Len Brown <len.brown@xxxxxxxxx> Date: Tue Apr 7 17:33:58 2009 -0400 ACPICA: delete check for AML access to port 0x81-83 thanks, Len Brown, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
