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Identification

Make: Hewlett Packard (HP)

Brand: Pavilion Entertainment PC

Model: DV5-1124CA (equipped with an 1.90 GHz AMD Athlon X2 QL-60 Dual-Core Processor)

Contact: marco.laverdiere (tip to find email address: Google service!)

Overview

Everything is working pretty well out of the box (my first install was with Intrepid, 8.10). Here are some tips and tweaks to make it work perfectly:

Suspend-to-ram (sleep)

With Ubuntu Jaunty and the latest BIOS upgrade (05-2009, F. 34) it appears that suspend-to-ram is working out of the box. For the latest BIOS, see: http://h10025.www1.hp.com/ewfrf/wc/softwareList?os=2093&lc=en&dlc=en&cc=ca&lang=en&product=3828098

Previously (before Jaunty and/or BIOS upgrade) the kernel boot option i8042.reset had to be used for suspend-to-ram to work. It had to be added to the Grub menu configuration file, i.e. in /boot/grub/menu.lst, as in the following:

kernel /boot/vmlinuz-2.6.27-11-generic root=UUID=e805a537-55fa-4e4f-8f3d-866780911afc ro quiet splash i8042.reset

Once this option was added, a reboot was necessary to allow the option to be effective.

See message #15 in this thread for more details: http://ubuntuforums.org/showthread.php?t=1047284&page=2

Finally, see these bug reports on the suspend issue with HP-DV5:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/332805

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/301353

http://bugzilla.kernel.org/show_bug.cgi?id=11368

Wifi card

The internal card works out of the box (so there's nothing to install) with the quite new (when Intrepid was released) ath9k driver: http://linuxwireless.org/en/users/Drivers/ath9k

On Jaunty (9.04) and Karmic (9.10), it is advisable to use the latest version of the ath9k driver since it appears to be more reliable. It's just a matter of installing the backport modules:

sudo apt-get install linux-backports-modules-karmic

then reboot

On Karmic, while the backport module helps a lot, there is still one stability issue. See this bug report and my comment:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/333730?comments=all

To circumvent the issue, one could use ndiswrapper, instead of the ath9k module, with the latest windows XP driver available on this page for AR928X: http://www.atheros.cz/

The only problem with ndiswrapper (for now) is the lost of the blue led functionality...

Microphone

There was no problem with the HDA-Intel internal sound card until I upgrade to Jaunty. Since then, I was not able to use the microphone, neither with sound recorder, Skype or Cheese. Solution was to add this line to /etc/modprobe.d/alsa-base.conf and reboot after:

options snd-hda-intel model=hp-dv5

See these threads for more info:

http://bugzilla.kernel.org/show_bug.cgi?id=12440

https://bugs.launchpad.net/bugs/316125

Good luck!