Please reply if this is still an issue on a supported release.
** Changed in: laptop-mode-tools
Status: New => Invalid
** Changed in: pm-utils (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/459967
Title:
scripts called on ac power or battery power fail (power.d)
Status in acpid:
New
Status in Laptop Mode Tools:
Invalid
Status in “pm-utils” package in Ubuntu:
Invalid
Bug description:
Binary package hint: pm-utils
I want a script to be executed when my laptop is connected to AC and another
one when it runs on battery.
For the beginning it should just do
On AC:
echo max_performance | tee
/sys/class/scsi_host/host0/link_power_management_policy
On battery:
echo min_power | tee /sys/class/scsi_host/host0/link_power_management_policy
I decided to create two scripts in /etc/laptop-mode/batt-stop/ and
/etc/laptop-mode/batt-start
but they where sometimes executed and sometimes not. I thought this is
strange, maybe laptop-mode-tools is buggy and I investigated an alternative
approach.
There are two files in /etc/acpi/events/ :
ac and battery
both call /etc/acpi/power.sh
which in return calls pm-powersave
man powersave tells me there are two directories
/usr/lib/pm-utils/power.d/ and
/etc/pm/power.d/
the later has priority but was empty on my installation,
so I went to /usr/lib/pm-utils/power.d/
I created my own file here, called my-powersave
/usr/lib/pm-utils/power.d/ lsl
total 28K
drwxr-xr-x 2 root root 4,0K 2009-10-24 20:34 .
drwxr-xr-x 6 root root 4,0K 2009-10-21 05:34 ..
-rwxr-xr-x 1 root root 1,4K 2009-10-06 23:41 95hdparm-apm
-rwxr-xr-x 1 root root 646 2009-09-17 21:33 anacron
-rwxr-xr-x 1 root root 293 2009-10-07 01:02 laptop-mode
-rwxr-xr-x 1 root root 248 2009-10-24 20:36 my-powersave
-rwxr-xr-x 1 root root 693 2009-10-06 23:41 sched-powersave
This worked, BUT again the sata link sometimes stayed at max_performance in
battery power.
It worked most of the time if you have not done anything when removing the
power and it hardly ever worked when you disconnect and reconnect in short 5
second intervals.
I think there is an underlying bug in pm-utils or acpi.
I would happily provide needed logfiles or debug output if you tell me which.
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