Ubuntu - Unable to connect to wifi after i close the lid

So everytime i close the lid and i reopen it, the wifi just stops working. It says it is trying to connect but it never does. I am using a dv6tqe with ubuntu 12.04. I googled the issue and i saw that many were having the same problem. Did anyone have this problem? How did you solve it?

 

I read some of the threads about this problem, and it seems like a BIOS power management issue.

First, what is the full model number of your dv6t?

Have you tried looking for a BIOS update on hp.com?

 

I am not sure how can i check my full model and the bios version i am using?

 

Find the BIOS version:

Code:

sudo dmidecode -s bios-version

Model number:

Code:

sudo dmidecode -s system-product-name

The full model number should also be on a label on the bottom of the computer.

 

Bios Version = F.1a, 7/20/2011

 

[all variants] up to date guide for HP dv6t and Ubuntu 12.04 - Ubuntu Forums

How's your temperature going with 12.04?

 

I changed distro

..it's a power-state script problem. Well-known, has been a long-running problem since no one agrees on how to manage acpi between drivers and devices. But it's possible to solve it by writing a suspend script that carefully shuts down all devices in order, and then unwinds afterwards with the proper checks and waits for component responses.

Another popular solution is to do nothing, wait indefinitely, and expect hardware manufacturers to create open source drivers to stop their customers from complaining. Or get hackers to reverse-engineer a driver, before they'd have to rewrite the driver again to conform with the guidelines no one agrees on. Which is working great, obviously.

Short-term fix might be to try a different wifi hardware driver (if the dv6 comes with different wifi cards, this might be a good idea - tinkering ahoy, blacklisting a driver to prevent it from automatically loading, etc). Other options would be scouring the net for sane acpi scripts for your laptop model.

 

Does the bt_coex_active=0 parameter to iwlwifi not work as in the guide linked by sanjie? BTW, no reboot needed with that, just reload the module and try suspending/resuming:

Code:

sudo modprobe -r iwlwifi
sudo modprobe iwlwifi bt_coex_active=0
sudo pm-suspend

@danicloud, we still don't know your model name... BIOS revision alone does not say anything about what system you have.

 

I think i am giving up on ubuntu for now. What distro are you using? How is the support for the dv6?

 

The dv6 has so many different hardware variants, so it's difficult to say if one version is going to work or not. If you booted on the latest kernel, for example, you're probably going to have the same problem on the next distro as well, with the same drivers, etc.

Allurgroceries can actually help you, by the way. Instead of just talking your ear off

 

The model is dv6t-6100 but i am not sure.

Thank you for your help

 

Have you tried just disabling / re-enabling the wifi card from the keyboard to see if it comes back after that?