On 12/03/2011 05:26 PM, Karol Babioch wrote:

Hi,

I've recently installed Arch on my laptop and got a odd problem that I haven't encountered so far.

Whenever I put my laptop into "Suspend to RAM" my wireless LED stays on, which is quite annoying. It probably doesn't use that much energy, but still I want to have nothing blinking, but the power LED.

I investigated a little bit into it, and found out that the wireless LED stays on when at least one of the following devices is activated: Bluetooth, WWAN, Wireless LAN.

This makes totally sense. As soon as blocking all three of these devices using rfkill, the LED turns off. I'm probably could now write a script that would get executed during "Suspend to RAM" using pm-utils.

However before hacking around this, I would like to know what the expected way for this actually is. Doesn't a "Suspend to RAM" invoke rfkill at some point or at least shouldn't it try to disable such hardware?

As I haven't experienced this issue with my former laptop, I'm not exactly sure whether this is a bug or a feature, so I'm glad about any input you give me on that.

Best regards, Karol Babioch

I think new in 3.1 (might have been 3.0) was wireless wake-on-lan. You might be able to use ethtool to see if you have WOL enabled for your wireless card which would prevent it from being powered down.