HP Pavillion DV2404CA

wireless:https://help.ubuntu.com/community/WifiDocs/Driver/1390
remember to load ndiswrapper on startup:
* Set ndiswrapper to load on startup

Code:

sudo ndiswrapper -m
gksudo gedit /etc/modules

* Add the following module to the list

Code:

ndiswrapper





sound:http://ubuntuforums.org/showthread.php?t=455147
(install new alsa drivers)

2. There is still an issue unresolved, the ‘no sound after a windows session ‘ and can be fixed by unplugging the power cord before booting Ubuntu. If it doesn’t work, reboot again with no power cord.
3. If you still don’t have sound try this:

I. Boot up Ubuntu WITHOUT power cable.
a. upgrade kernel if you would like.
b. edit /etc/modprobe.d/alsa-base: options snd-hda-intel index=0 model=3stack-dig
II. play some sound or something (make sure it works)
III. Rather than restart send it into hibernate.
IIII. after hibernation is complete, bring it back up.
it should crash.upon crashing, alt+ctrl+del
reboot into ubuntu.




CPU freq Scaling
terminal, type
sudo chmod +s /usr/bin/cpufreq-selector
then use the cpu freq app for gnome-panel.



to disable hibernate
add "noresume" to menu.lst



LAPTOP MODE

ven after enabling LAPTOP_MODE in /etc/default/acpi-support and putting the GPU in low-power mode as explained above, I get only 2 hours and 40 minutes. This is almost a show stopper.


brightness

be careful: read before using it... sudo chown system_username /proc/acpi/video/VGA/LCD/brightness
then
echo "n" > /proc/acpi/video/VGA/LCD/brightness