Public bug reported:
For some PC models it's necessary to use a custom ACPI DSDT Table for
the correct working of Fans and other system stuff. To load such a table
you could either compile a new kernel with this custom table in it, or
provide it via grub.
It would be a huge benefit for Ubuntu to provide this functionality out
of the box.
Current steps necessary:
=====================
1.) Build a new DSDT and place it under /boot/dsdt.aml
2.) Place the following content under /etc/grub.d/01_acpi:
--------------------CUT--------------------
#! /bin/sh -e
# Uncomment to load custom ACPI table
GRUB_CUSTOM_ACPI="/boot/dsdt.aml"
# DON'T MODIFY ANYTHING BELOW THIS LINE!
prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
. ${libdir}/grub/grub-mkconfig_lib
# Load custom ACPI table
if [ x${GRUB_CUSTOM_ACPI} != x ] && [ -f ${GRUB_CUSTOM_ACPI} ] \
&& is_path_readable_by_grub ${GRUB_CUSTOM_ACPI}; then
echo "Found custom ACPI table: ${GRUB_CUSTOM_ACPI}" >&2
prepare_grub_to_access_device `${grub_probe} --target=device
${GRUB_CUSTOM_ACPI}` | sed -e "s/^/ /"
cat << EOF
acpi (\$root)`make_system_path_relative_to_its_root ${GRUB_CUSTOM_ACPI}`
EOF
fi
--------------------CUT--------------------
3.) update-grub
Desired steps necessary:
=====================
1.) Ship the above (or a similar) script fragment per default
2.) Place the GRUB_CUSTOM_ACPU in /etc/default/grub for centralised access
Additional information
==================
Ubuntu-release:
Description: Ubuntu 12.04.1 LTS
Release: 12.04
grub-packages:
grub2:
Installed: (none)
Candidate: 1.99-21ubuntu3.1
Version table:
1.99-21ubuntu3.1 0
500 http://susrtumi1/ubuntu/ubuntu/ precise-updates/universe i386
Packages
1.99-21ubuntu3 0
500 http://susrtumi1/ubuntu/ubuntu/ precise/universe i386 Packages
test@test01:/etc/default$ dpkg --list | grep grub
ii grub-common 1.99-21ubuntu3.1 GRand Unified
Bootloader (common files)
ii grub-gfxpayload-lists 0.6 GRUB gfxpayload
blacklist
ii grub-pc 1.99-21ubuntu3.1 GRand Unified
Bootloader, version 2 (PC/BIOS version)
ii grub-pc-bin 1.99-21ubuntu3.1 GRand Unified
Bootloader, version 2 (PC/BIOS binaries)
ii grub2-common 1.99-21ubuntu3.1 GRand Unified
Bootloader (common files for version 2)
** Affects: grub (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1045690
Title:
Allow custom DSDT overrides in grub per default
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