saving power on batter - dell xps 1330

[Pakos]

I know that there are already a lot of scripts for saving power on a battery but i'm working on something a bit different so any help would be great ;)
Let me use numbers for questions, would be easier for you and me.

1. Deactivating hardware (for example usb via modprobe -r) would make less power usage?

2. Powertop: it's showing me some suggestions but everytime when i open it again i see there same suggestions. Isn't it forever? Or after each system reset i have to do it again?

3. If question nr 1 is true:
uvcvideo hci_usb rfcomm l2cap bluetooth usbhid uhci_hcd ehci_hcd sdhci mmc_core sr_mod cdrom
Removing these modules turns off cdrom, bluetooth, usb, camera and card reader (sd/mmc and so on ;d) right? Is it required to turn off some deamons, like bluetooth and anything else?

4.Suggested from powertop:
echo min_power > /sys/class/scsi_host/host0/link_power_management_policy
hal-disable-polling --device /dev/cdrom
Second command works great, first one not.
Even when i use sudo it says "Permission denied", why?

5. Yet another suggestion from powertop:
Suggestion: increase the VM dirty writeback time from 0.30 to 15 seconds with:
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
I'm not sure what does it mean, should i use it?

6. Removing sound card. I can't figure it out, anyone could tell me which modules should be removed?

7. Suggestion form internet:
rmmod lp parport_pc ppdev parport 2> /dev/null;
echo "Parallel port is now OFF";;
What is a parallel port? ;p

8. Pcspkr module is for speakers? Or like in normal computers little speaker on motherboard?

9. Wifi - i'm using ndiswrapper for wifi so removing ndiswrapper module will turn off wifi?

10. Which module is used for lan card (where you put cable for the net ;d)

11. Should i turn off anything else? Or do you have any other ideas? ;)

Here is my lsmod:
lsmod
Module Size Used by
nls_cp437 8320 0
isofs 39464 0
loop 21508 0
af_packet 27272 4
ipv6 311848 10
i915 38144 2
drm 105896 3 i915
binfmt_misc 14860 1
rfcomm 47392 2
l2cap 28800 13 rfcomm
ppdev 11400 0
acpi_cpufreq 10832 2
cpufreq_userspace 6180 0
cpufreq_ondemand 11152 1
cpufreq_stats 8416 0
freq_table 6464 3 acpi_cpufreq,cpufreq_ondemand,cpufreq_stats
cpufreq_conservative 10632 0
cpufreq_powersave 3200 0
container 6656 0
sbs 17808 0
sbshc 8960 1 sbs
dock 12960 0
iptable_filter 4608 0
ip_tables 24104 1 iptable_filter
x_tables 23560 1 ip_tables
ndiswrapper 243872 0
sbp2 27272 0
parport_pc 41128 0
lp 14916 0
parport 44300 3 ppdev,parport_pc,lp
joydev 15488 0
dcdbas 11312 0
uvcvideo 62084 0
hci_usb 19228 2
compat_ioctl32 11136 1 uvcvideo
videodev 30720 1 uvcvideo
v4l1_compat 15492 2 uvcvideo,videodev
v4l2_common 21888 3 uvcvideo,compat_ioctl32,videodev
bluetooth 67748 7 rfcomm,l2cap,hci_usb
evdev 14976 9
snd_hda_intel 440408 4
snd_pcm_oss 47648 0
snd_mixer_oss 20224 1 snd_pcm_oss
snd_pcm 92168 3 snd_hda_intel,snd_pcm_oss
snd_page_alloc 13200 2 snd_hda_intel,snd_pcm
snd_hwdep 12552 1 snd_hda_intel
snd_seq_dummy 5764 0
snd_seq_oss 38912 0
video 23444 0
output 5632 1 video
snd_seq_midi 10688 0
snd_rawmidi 29856 1 snd_seq_midi
sdhci 21508 0
serio_raw 9092 0
snd_seq_midi_event 10112 2 snd_seq_oss,snd_seq_midi
snd_seq 63232 6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_mid i_event
ricoh_mmc 5120 0
mmc_core 59272 1 sdhci
wmi_acer 11076 0
battery 16776 0
snd_timer 27912 2 snd_pcm,snd_seq
snd_seq_device 10644 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi ,snd_seq
button 10912 0
snd 70856 18 snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,sn d_hwdep,snd_seq_dummy,snd_seq_oss,snd_rawmidi,snd_ seq,snd_timer,snd_seq_device
ac 8328 0
intel_agp 30624 1
iTCO_wdt 15312 0
iTCO_vendor_support 5764 1 iTCO_wdt
shpchp 38172 0
pci_hotplug 34608 1 shpchp
pcspkr 4992 0
soundcore 10400 1 snd
psmouse 46236 0
ext3 149264 1
jbd 57000 1 ext3
mbcache 11392 1 ext3
sr_mod 20132 0
cdrom 41512 1 sr_mod
usbhid 35296 0
hid 44992 1 usbhid
sg 41880 0
sd_mod 33280 3
ata_piix 24196 0
ata_generic 9988 0
ahci 33028 2
pata_acpi 9856 0
ohci1394 36532 0
libata 176432 4 ata_piix,ata_generic,ahci,pata_acpi
scsi_mod 178488 5 sbp2,sr_mod,sg,sd_mod,libata
ieee1394 106968 2 sbp2,ohci1394
tg3 124804 0
ehci_hcd 41996 0
uhci_hcd 29856 0
usbcore 169904 7 ndiswrapper,uvcvideo,hci_usb,usbhid,ehci_hcd,uhci_ hcd
thermal 19744 0
processor 41448 4 acpi_cpufreq,thermal
fan 6792 0
fbcon 46336 0
tileblit 4096 1 fbcon
font 10112 1 fbcon
bitblit 7424 1 fbcon
softcursor 3712 1 bitblit
fuse 56112 3



Sorry for pretty lame questions but i'm trying to make bigger my linux knowledge ;)

[iggykoopa]

1. yes it will
2. it doesn't save the seettings you make
3. if you try to rmmod the modules it will tell you what other modules you have to stop first
4. you have to type in sudo su, that will give you a root terminal, then type in the command. For some reason you can't just run it with sudo.
5. it changes how often the journal is written back to the drive, it's relatively safe. But if you lose power any info you've done in those 30 seconds between write backs could be lost.
6. depends on what model of sound card you have
7. If you don't know what it is you should be safe to remove it, if your on a laptop you probably don't even have one. It used to be used for hooking up printers and the like.
8. the little speaker on the motherboard.
9. it should, I haven't tested it though because I have intel wireless. try removing it while running powertop and see if you save power.
10. I'd have to look it up again sorry forgot.
11. http://ubuntuforums.org/showthread.php?t=847773 is a good thread about the subject. Also I'm working on a gui for the power management settings, it's going to be incorporated into wattos.

[Pakos]

3. I know that and with these modules everything works fine. I'm only wondering about deamons in /etc/init.d like bluetooth ;)

4. Thx but since it's working in script i will not do anything else :)

6. Lspci says: Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)

7. Well yeah I'm on laptop so why these modules are used?

11. I've seen that before but as I said I'm looking for some hardware which can be deactivated and everything from that post is used here ;)


Would be nice to get help with sound card as soon as possible. If anyone care about this here you can see my script, it's an early version so there can be something messed up so let me know if you see something :)
#!/bin/bash
#
# Bash script for Dell XPS 1330
# Saves power by disconnecting some hardware
echo -e "Bash script for Dell XPS 1330\nSaves power by disconnecting some hardware\n";
echo -e "Choose option:\n1. Deactivate all.\n2. Activate all.\n";
read odp;
if [ $odp = 1 ]; then
echo "Deactivating all."
rmmod uvcvideo hci_usb rfcomm l2cap bluetooth usbhid uhci_hcd ehci_hcd sdhci mmc_core sr_mod cdrom 2> /dev/null
hal-disable-polling --device /dev/cdrom 1> /dev/null
echo 1500 > /proc/sys/vm/dirty_writeback_centisecs
echo min_power > /sys/class/scsi_host/host0/link_power_management_policy
echo min_power > /sys/class/scsi_host/host1/link_power_management_policy
echo min_power > /sys/class/scsi_host/host2/link_power_management_policy
elif [ $odp = 2 ]; then
echo "Activating all."
for MOD in uvcvideo hci_usb rfcomm l2cap bluetooth usbhid uhci_hcd ehci_hcd sdhci mmc_core sr_mod cdrom
do
modprobe $MOD 2> /dev/null
done
hal-disable-polling --enable-polling --device /dev/cdrom 1> /dev/null
echo 30 > /proc/sys/vm/dirty_writeback_centisecs
echo max_performance > /sys/class/scsi_host/host0/link_power_management_policy
echo max_performance > /sys/class/scsi_host/host1/link_power_management_policy
echo max_performance > /sys/class/scsi_host/host2/link_power_management_policy
else
echo "Something is wrong :)"
fi
exit 0

[iggykoopa]

for the sound /sys/module/snd_hda_intel/parameters/power_save is the file you wanna use and echo 10 to it for power saving and 0 for regular.