[Mint] [Solved] Linux mint - No sound on Speakers, but heaphones work.

This is very similar to the issue I had in Ubuntu, however the fix was not the same,

here is what you do:

sudo gedit /etc/modprobe.d/alsa-base.conf 

And on the last line add this line:

options snd-hda-intel index=0 model=hp

To the bottom of the file.

now, we have to modify it to work with your computer,

run this:

inxi -A

the output should look like:

Audio:     Card: Intel 6 Series/C200 Series Chipset Family High Definition Audio Controller driver: snd_hda_intel

           Sound: Advanced Linux Sound Architecture ver: 1.0.24

and  where it says 'snd_' 

that's the driver you need,  if it's not 'snd-hda-intel' 

then use what ever your output was instead.

next for your model,
it should be your pc's manufacturer, here is the full list:
http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt

save the file, and reboot!

and now you're done!

Note:
Just in case you have come from reading the Ubuntu version of this Fix,
No, you do not have to block the RTC module.
(if you have not read the Ubuntu version, ignore this note.)

Sources:
http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt
http://forums.linuxmint.com/viewtopic.php?t=73815&f=48#p428775 thanks  johnny87au !!!

BackLight not working on your laptop? try this!

Every since I got this new HP laptop about a year ago,
I was unable to change the backlight brightness, this caused many issues,
most noticeably with battery life. and after a year and 3 months I finally found the Fix:

Special thanks to Chris Moore at askubuntu.com

All you have to do is edit /etc/default/grub
and find the line : GRUB_CMDLINE_LINUX_DEFAULT="
and add acpi_backlight=vendor to the end of it.
so the full line should read:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

Save the file and then run sudo update-grub
after you reboot, you will now be able to change your brightness! Minor issue: sometime after my screen has been locked for a while, the brightness dose not turn on but the password screen comes up, after you type your password and press enter, you will be able to turn your brightness back up (using keyboard). weird, I'll let you guys know if I find a fix. source: http://askubuntu.com/questions/21523/screen-brightness-not-changing-on-acer-5742-notebook/148242#148242