[SOLVED] workaround for Acer AOD150 lid close interrupt storm

BenCollver · 10-03-2009, 01:13 PM

kernel-aod150-smp-2.6.29.6_smp-i686-1.txz

kernel-aod150-smp-src.zip

Closing the lid on an Acer AOD150 netbook causes an interrupt storm in Linux. You can observe this by powering on the netbook and running the top command. Notice that %sy is less than 1% on the CPU(s) line. Close the lid and open it. Now %sy will be 30% to 50%. Left running, this will eventually cause the netbook to overheat and crash. This is either a BIOS bug or a Linux kernel bug.

"this is a BIOS bug" (1)

"consider it a Linux bug if Windows handles an un-modified DSDT and Linux does not." (2)

This kernel package uses a modified DSDT to work around the problem and ignore the lid close event. To build this package, copy DSDT.hex to /usr/src/linux/include/ and follow k/README.TXT using the configuration file config-aod150-smp-2.6.29.6-smp. After booting this kernel you should see in dmesg: Table [DSDT] replaced by host OS. Now you can close the lid and %sy will remain below 1% in top.

To produce DSDT.hex, I installed acpica (3) and followed steps from the ACPI FAQ (4).

Code:

cp /proc/acpi/dsdt DSDT.dat
iasl -d DSDT.dat
patch -p0 <DSDT.dsl.diff
iasl -tc DSDT.dsl

(1)
http://bugzilla.kernel.org/show_bug.cgi?id=10485#c6

(2)
http://acpi.sourceforge.net/dsdt/index.php

(3)
http://slackbuilds.org/repository/13...opment/acpica/

(4)
http://www.lesswatts.org/projects/acpi/faq.php

Dinithion · 10-03-2009, 01:30 PM

I haven't tested this yet, but I surly will test this as soon as possible. It's really annoying.

Dinithion · 10-27-2009, 05:49 AM

I completely forgot about this, but I thought I would give it a try. Anyway, how did you modify this .dsl file?

I can't use your .hex file (According to one of the links), because we have different kernel config files. Anyway, the guide say:

Old:
Method (_L1B, 0, NotSerialized)
{
Notify (\_SB.LID, 0x80)
}

New:
Method (_L1B, 0, NotSerialized)
{
Not (LIDP, LIDP)
Notify (\_SB.LID, 0x80)
}

Did you actually have this _L1B method? I've only got _L1D method, and I don't really feel like changing something I don't know what is

BenCollver · 11-01-2009, 09:03 AM

I hand edited the .dsl file. Here is DSDT.dsl.diff from kernel-aod150-smp-src.zip.

Code:

--- DSDT.dsl.orig	2009-10-03 07:37:35.893439656 -0700
+++ DSDT.dsl	2009-10-03 07:38:25.623434837 -0700
@@ -618,11 +618,13 @@
             Notify (\_SB.PCI0.UHC4, 0x02)
         }
 
+/* LID WORKAROUND
         Method (_L1D, 0, NotSerialized)
         {
             Not (LPDL, LPDL)
             Notify (\_SB.LID0, 0x80)
         }
+*/
     }
 
     Name (GPIC, Zero)
@@ -904,6 +906,7 @@
             Name (_HID, EisaId ("PNP0C0C"))
         }
 
+/* LID WORKAROND
         Device (LID0)
         {
             Name (_HID, EisaId ("PNP0C0D"))
@@ -912,6 +915,7 @@
                 Return (LPDL)
             }
         }
+*/
 
         Device (SLPB)
         {