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Commander

Member

Registered: 2011-02-12

Posts: 43

HP G62 & Ralink 5390 dropping connection when running on battery

Hi there,

I got an issue with my HP G62 laptop when running it on battery. The thing is that when running the laptop on battery i seem to get massive disconnect issues. It works for a while then i get a policy promt asking me to allow the network manager to connect to my WIFI. When entering the password it then comes up with "failed to connect" and wont connect to my network or any other for the matter.

The only way to make it connect once again is to (Down/Up) wifi with the keykombination (fn + network). Then it will autoconnect to my network and work for a while until it disconnects once again and ask for password and never connects.

After plugging the laptop to adapter the problem disappears and wont show up until i disconnect the laptop from power and let it run on battery then it will start disconnecting as explained above.

Laptop: HP G62
Kernel: 3.2.6-2-ARCH
Network controller: Ralink corp. RT5390 Wireless 802.11n 1T/1R PCIe

dmesg: http://codepad.org/7GqT8ZhH
Looking at the dmesg i see 2 lines

ieee80211 phy0: wlan0: No probe response from AP after 500ms, disconnecting.
wlan0: deauthenticated (Reason: 6)

Tried already to look for this and I did get few post from last year however no way to fix this or people having these issues was fixed in kernel 3.0. So my question is does anyone know how to fix this or some kind of workaround other than running on power all the time. Also this wont matter what state the battery is, it may be charged 99% and still starting to disconnect.

Kind Regards
Commander

.:B:.

Forum Fellow

Registered: 2006-11-26

Posts: 5,819

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Re: HP G62 & Ralink 5390 dropping connection when running on battery

My guess is your wireless card goes into a powersaving state. I have had such issues myself with a Ralink RT2500 card. Turns out there was a bug with power management.

The fix was to disable it:

# iwconfig wlan0 power off

Don't know if it will work for your model, but it's worth a try?

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Commander

Member

Registered: 2011-02-12

Posts: 43

Re: HP G62 & Ralink 5390 dropping connection when running on battery

My guess is your wireless card goes into a powersaving state. I have had such issues myself with a Ralink RT2500 card. Turns out there was a bug with power management.

The fix was to disable it:

# iwconfig wlan0 power off

Don't know if it will work for your model, but it's worth a try?

Um, thanks m8 i think it just worked. Tried it today and it did not disconnect me even once when running on battery. Gonna try it out for couple of days and see if it really is this change that did it and if so mark it as solved.

And hopefully find a way to report this upstream so this will get fixed sooner or later.