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[bug #29385] grub2 somehow disables apm: cannot power down

From: ael
Subject: [bug #29385] grub2 somehow disables apm: cannot power down
Date: Tue, 30 Mar 2010 18:42:04 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-GB; rv: Gecko/20100316 Firefox/3.6.2

Follow-up Comment #2, bug #29385 (project grub):

I checked all of that pretty carefully before posting.

Here is the grub1 menu.lst entry:

title 2.6.34-rc2
root (hd0,2)
kernel (hd0,2)/boot/bzImage-2.6.34-rc2 root=/dev/hda7 vga=0x16c

and the matching grub2 grub.cfg entry:

menuentry "2.6.34-rc2" --class debian --class gnu-linux --class gnu --class
os {
insmod ext2
set root='(hd0,3)'
#set gfxpayload=1024x768
linux (hd0,3)/boot/bzImage-2.6.34-rc2 root=/dev/hda7 

Note that there is no initrd involved.

The only difference, apart from the apparently broken gfxpayload/vga support
in this version of grub2, is that
once the kernel is up and running, the linux apm module cannot
run after the grub2 boot. The module is present and found in both cases. But
the apm module issues the error message about the missing device after grub2
but not after grub1.

Similar results on other at least one other module.

For example, after a grub2 boot:-
# modprobe apm
FATAL: Error inserting apm
(/lib/modules/2.6.34-rc2/kernel/arch/x86/kernel/apm.ko): No such device

# ls -l /lib/modules/2.6.34-rc2/kernel/arch/x86/kernel/apm.ko
-rw-r--r-- 1 root root 37190 Mar 30 17:17


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