The linux-acpi team is about to integreate the requiered patch for custom dsdt loading :
Overide :
ToDo :
\dmesg | grep DSDT [ 0.000000] ACPI: Override [DSDT-CB-01 ], this is unsafe: tainting kernel [ 0.000000] ACPI: DSDT @ 0x00000000bcfee000 Table override, replaced with: [ 0.000000] ACPI: DSDT ffffffff81643ce0 09384 (v01 LENOVO CB-01 00000001 INTL 20100528) [ 0.005222] ACPI: Forced DSDT copy: length 0x09384 copied locally, original unmapped [ 0.524245] ACPI: EC: Look up EC in DSDT
add=0x00000000bcfee000 sudo dd if=/dev/mem bs=1 skip=$(printf "%d" $add) | xxd > orig.hex
add=0xffffffff81643ce0 sudo dd if=/dev/mem bs=1 skip=$(printf "%d" $add) | xxd > mine.hex
Place the DSDT.aml into /etc/initramfs-tools Don't forget to update the Initramfs:
file /etc/initramfs-tools/DSDT.aml ls /lib/modules/ KVER=$(uname -r) sudo update-initramfs -v -u -k $KVER
sudo apt-get install initramfs-tools ln -fs /etc/DSDT.aml /etc/mkinitrd/DSDT ln -fs /etc/DSDT.aml /etc/mkinitrd/DSDT.aml
dmesg | grep -i dsdt # ACPI: DSDT (v001 COMPAL CY26____ 0x06040000 MSFT 0x0100000e) @ 0x00000000 # ACPI: Looking for DSDT in initramfs... error, file /DSDT.aml not found.
sudo apt-get install initramfs-tools
# ACPI: Looking for DSDT in initramfs… successfully read 11567 bytes from /DSDT.aml.
# ACPI (tbget-0297): Table [DSDT] replaced by host OS [20060707]
# ACPI Machine Language (AML)
\su
cat /proc/acpi/dsdt > dsdt-$HOSTNAME.aml # as root
iasl -d dsdt-$HOSTNAME.aml # Disassamble and create dsdt.dsl
# Intel ACPI Component Architecture # ASL Optimizing Compiler / AML Disassembler version 20041203 [[Dec 27 2004]] # Copyright (C) 2000 - 2004 Intel Corporation # Supports ACPI Specification Revision 2.0c
# Loading Acpi table from file dsdt-nrv.aml # Acpi table [[DSDT]] successfully installed and loaded # Pass 1 parse of [[DSDT]] # Pass 2 parse of [[DSDT]] # Parsing Deferred Opcodes (Methods/Buffers/Packages/Regions) # ............................................................................................................................................................................................................. # Parsing completed # Disassembly completed, written to "dsdt-nrv.dsl"
iasl -tc dsdt-$HOSTNAME.dsl # will create two files, dsdt.hex and DSDT.aml.
# Intel ACPI Component Architecture # ASL Optimizing Compiler / AML Disassembler version 20041203 [[Dec 27 2004]] # Copyright (C) 2000 - 2004 Intel Corporation # Supports ACPI Specification Revision 2.0c # ASL Input: dsdt-nrv.dsl - 2813 lines, 98011 bytes, 1330 keywords # AML Output: DSDT.aml - 11567 bytes 444 named objects 886 executable opcodes # Compilation complete. 0 Errors, 0 Warnings, 0 Remarks, 395 Optimizations
# [[ "$?" ]] || exit
Kernel must be recompiled with this patch :
http://gaugusch.at/acpi-dsdt-initrd-patches/acpi-dsdt-initrd-patch-v0.7d-2.6.9.patch
cd /usr/src/linux-2.6.10 patch -b -p1 < ../acpi-dsdt-initrd-patch-v0.7d-2.6.9.patch
grep DSDT .config # CONFIG_ACPI_CUSTOM_DSDT=y # need to be uncommented and set to yes
INITRD_ORIG=/boot/initrd.img-`uname -r`
INITRD=${INITRD_ORIG}-${HOSTNAME}
mv $INITRD $INITRD-bak-$(date +%s).bak
cp -f $INITRD_ORIG $INITRD # custom version that include dsdt
echo -n "INITRDDSDT123DSDT123" >> $INITRD # start block mark ( dsdt block)
cat /etc/dsdt-${HOSTNAME}.aml >> $INITRD # custom fixed table
echo -n "INITRDDSDT321DSDT321" >> $INITRD # end block mark
# strings $INITRD | grep DSDT # INITRDDSDT123DSDT123DSDT/- # INITRDDSDT321DSDT321
# grep "initrd.*$HOSTNAME" /etc/lilo.conf # initrd=/boot/initrd.img-2.6.9-1-k7-nrv # lilo -v # # or Edit /boot/grub/menu.lst in order to add an entry which use the custom initrd
# reboot
dmesg | grep "DSDT"
# ACPI: Looking for DSDT in initrd... found (at offset 0x219014). # ACPI-0294: *** Info: Table [[DSDT]] replaced by host OS # ACPI: setting ELCR to 0200 (from 0c20) # ...
ed2k://|file|acpica-unix-20041203.tar.gz|670416|c4c742897d0c268d7cefefc5612043bd|
Else build it yourself :
cd acpica-unix-20041203 cd compiler && make # aslcompiler.l:846: error: `yytext_ptr' undeclared (first use in this function)
+++ acpica-0.0.20041203_www_rzr_online_fr/compiler/aslcompilerlex.c 2004-12-27 20:15:59.000000000 +0100
@@ -4021,7 +4021,7 @@ #undef yy_set_bol #undef yy_new_buffer #undef yy_set_interactive *#undef yytext_ptr +// rzr // #undef yytext_ptr // HERE FIXED #undef YY_DO_BEFORE_ACTION
make -C ./compiler/ make -C ./tools/acpisrc/
install -d ${DESTDIR}/usr/bin/
install -s compiler/iasl ${DESTDIR}/usr/bin/
install -s tools/acpisrc/acpisrc ${DESTDIR}/usr/bin/
Normally you can skip this chapter.
Using a custom DSDT on kernel 2.6.8.1mdk (InitRD method)
Mandrake Kernel was already compiled for use of custom dsdt in initrd
I added the “magic signature” and the DSDT to my InitRD (I use mandrake, and there is an initrd by default) : it was found at boot, but then I had an error :
What I did :
cp -f /boot/initrd-2.6.8.1-12mdk.img /boot/initrd-2.6.8.1-12mdk.img-DSDT echo -n "INITRDDSDT123DSDT123" >> /boot/initrd-2.6.8.1-12mdk.img-DSDT cat dsdt.aml >> /boot/initrd-2.6.8.1-12mdk.img-DSDT
What I got (kernel messages) :
ACPI: Using customized DSDT ACPI-0196: *** Warning: Invalid checksum in table [[DSDT]] (C1, sum 58 is not zero) ACPI-0299: *** Info: Table [[DSDT]] replaced by host OS ACPI-0307: *** Error: ns_search_and_enter: Bad character in ACPI Name: CACACACA ACPI-0279: *** Error: Looking up [[0xCACACACA]] (NON-ASCII) ACPI-1133: *** Error: [[NULL NAME]], AE_BAD_CHARACTER ACPI-0125: *** Error: acpi_load_tables: Could not load namespace: AE_BAD_CHARACTER ACPI-0134: *** Error: acpi_load_tables: Could not load tables: AE_BAD_CHARACTER ACPI: Unable to load the System Description Tables
What I did to solve it… after hours of tries :
cp -f /boot/initrd-2.6.8.1-12mdk.img /boot/initrd-2.6.8.1-12mdk.img-DSDT echo -n "INITRDDSDT123DSDT123" >> /boot/initrd-2.6.8.1-12mdk.img-DSDT cat dsdt.aml >> /boot/initrd-2.6.8.1-12mdk.img-DSDT echo -n "INITRDDSDT321DSDT321" >> /boot/initrd-2.6.8.1-12mdk.img-DSDT
Edit /boot/grub/menu.lst in order to add an entry which uses my custom initrd
Without that last line, the kernel couldn't find the end of the DSDT table (that's strange, because it was at the end of the initrd).
What I get now :
ACPI: Using customized DSDT ACPI-0299: *** Info: Table [[DSDT]] replaced by host OS
OK, the BIOS DSDT was replaced by mine. Testing can start.
Now the kernel knows when to stop and the custom dsdt is used. Weird it wasn't in the howtos.