Yes I did, but I wanted the grub menu to still have the option to boot
without using the patched DSDT.
I put the patched DSDT in /boot/mydsdt.aml and changed
/etc/grub.d/10_linux per the diff/patch below. This was to 12.04 so
10_linux may be a little different in 12.10. I also have to watch out
for normal system updates of grub.
This adds another item to the menu and it is the first so it becomes the
default. This item is just like the normal linux non-recovery boot
except it first invokes grub's acpi command. The second menu item is
normal boot w/o acpi and the third is now recovery boot.
Let me know if something like this works with UEFI always enabled. In
my case I rarely run windows on the laptop so I just change the BIOS
back when I need to. Some of the other messages implied the DSDT could
not be loaded in UEFI mode.
The patch (made with "diff -c 10_linux.orig 10_linux" within
/etc/grub.d):
*** 10_linux.orig 2012-12-10 06:20:08.000000000 -0600
--- 10_linux 2013-03-07 09:13:51.175997701 -0600
***************
*** 81,89 ****
--- 81,96 ----
os="$1"
version="$2"
recovery="$3"
+ capi=false
+ if [ "xcustomacpi" = "x$recovery" ]; then
+ recovery="false"
+ capi="true"
+ fi
args="$4"
if ${recovery} ; then
title="$(gettext_quoted "%s, with Linux %s (recovery mode)")"
+ elif ${capi} ; then
+ title="$(gettext_quoted "%s, with Linux %s (custom DSDT)")"
else
title="$(gettext_quoted "%s, with Linux %s")"
fi
***************
*** 120,125 ****
--- 127,137 ----
echo '$message'
EOF
fi
+ if ${capi} ; then
+ cat << EOF
+ acpi /boot/mydsdt.aml
+ EOF
+ fi
if test -d /sys/firmware/efi && test -e "${linux}.efi.signed"; then
cat << EOF
linux ${rel_dirname}/${basename}.efi.signed
root=${linux_root_device_thisversion} ro ${args}
***************
*** 252,257 ****
--- 264,272 ----
linux_root_device_thisversion=${GRUB_DEVICE}
fi
+ linux_entry "${OS}" "${version}" "customacpi" \
+ "${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_EXTRA}
${GRUB_CMDLINE_LINUX_DEFAULT}" \
+ quiet
linux_entry "${OS}" "${version}" false \
"${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_EXTRA}
${GRUB_CMDLINE_LINUX_DEFAULT}" \
quiet
The idea for this came from a similar approach at
http://blog.michael.kuron-germany.de/2011/03/patching-dsdt-in-recent-linux-kernels-without-recompiling/
Tom
On 4/21/2013 2:06 PM, Jon Baca wrote:
> I successfully applied this fix to 12.10. Did you put add the acpi
> command to the grub.cfg file?
>
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https://bugs.launchpad.net/bugs/1093217
Title:
Ubuntu 12.04/12.10/13.04 10-20min boot delay (From 3.2.0.29->3.8.0.19)
[Lenovo IdeaPad Z580]
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