Hi Manish; I've never tried NM during boot. (Personally, I dislike NM at all.) You might find a system similar to this to be more of your liking: http://wiki.centos.org/HowTos/Laptops/WpaSupplicant I use this in place of my CentOS 6 backup server, which has an rt2500pci card in it--which, by the way, is a horrible shoddy card that I do not recommend. It doesn't play nice with Netgear APs. But I digress. CentOS 6 appears to have made some changes to the above document. What I've discovered is: 1. You don't need to edit ifup-wireless. 2. You don't need to edit ifconfig-* (although one should be created--I can post mine if it'll help you.) 3. All you need in /etc/rc.local is an 'ifup wlan0' line. 4. You DO need to edit /etc/sysconfig/wpa_supplicant and add the interface of your wireless card to the options there (example: -iwlan0). 5. wpa_supplicant should be ENABLED on boot. I also found out that I actually have editing rights on that page, so I'll post my experiences in the next day or so. I hope this helps. Cheers, Cody Jackson On 7/18/11, Manish Kathuria <mkathuria at tuxtechnologies.co.in> wrote: > I have recently installed CentOS 6 on a system with a Realtek 8180L > wireless card. The wireless card is detected properly and uses the > rtl8180 driver. But it connects to our wireless network only after > logging to the Desktop Environment (GNOME) and using the Network > Manager Applet. In order to make the wireless card connect to the > network automatically at system start up, I edited the Connection > using the Network Manager Applet and checked "Connect Automatically" > and "Available to all users" options. However, while booting the > system, the following error message is displayed when the wireless > network interface is brought up. > > Device does not seem to be present, delaying initialization > > But as soon as a user logs on to the Desktop, he can connect to the > network using the NM Applet. > > I have also toggled between using DHCP and Static IP Address for the > the wireless card but it makes no difference. The SSID is not being > broadcast and the Wireless Access Point / Router uses WPA-PSK. > > TIA, > -- > Manish Kathuria > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >