I have this bug too, Ubuntu 9.10
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Realtek Semiconductor Co., Ltd. RTL-8185 IEEE 802.11a/b/g Wireless LAN
Controller (rev 20)
https://bugs.launchpad.net/bugs/336372
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Had some problem in ubuntu 9.10 after "apt-get update" when kernel
package was updated to 2.6.31-17.55~ppa7 version. I was boot old kernel,
installed on my laptop and fixed it with that commands:
sudo dpkg-reconfigure udev
sudo dpkg-reconfigure linux-image-2.6.31.17-generic
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udevadm trigger is