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Since I installed Ubuntu 12.04 (fresh, not upgrade), my wifi is much weaker than before and much weaker than under Windows XP. It doesn't establish a connection unless I carry the notebook directly to the hotspot. (Side note: I remember my 9.04 had stronger wifi than XP).

My wireless interface is wlan0 and with sudo lspci -nn I found that my network controller is:

Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG [Golan] Network Connection [8086:4222] (rev 02)

Should I report it as a bug?

Is there a configuration how I can improve it?

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The operating system you use has nothing to do with your Wi-fi card's signal strength. – Mitch May 26 '12 at 10:03
The operating systems I use(d) have different drivers to control the (same) wireless hardware. I am sure that the signal strength of the hotspot was not changed. – Freddi Schiller May 26 '12 at 10:40
I tried sudo iwconfig wlan0 power off but I get Error for wireless request "Set Power Management" (8B2C): SET failed on device wlan0 ; Operation not supported. Is anyone able to give a really helpful idea? – Freddi Schiller May 28 '12 at 16:39

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