Comment 10 for bug 322902

I can also confirm the bug in Lucid.

I can connect (XP - Ubuntu 10.04) via an unencrypted or nearly unencrypted (WEP) Ad-Hoc connection.

I noticed how the following fact, which might hint to the source of the problem:

When I switch to WPA, the Ad-Hoc network an XP machine is listed as encrypted, but not as an WPA encrypted network (my home network is WPA2 and listed as such).

XP asks for a password, but expects an WEP key (for the WPA network).

A network scan from another Ubuntu machine showed:

my home network with WPA2:

          Cell 01 - Address: 00:26:4D:1A:7F:C7
                    ESSID:"Heimnetz"
                    Mode:Master
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=49/100 Signal level=-66 dBm
                    Encryption key:on
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                       Preauthentication Supported
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 12 Mb/s
                              24 Mb/s; 48 Mb/s
                    Extra:tsf=000002ecfd456932

the Ad-Hoc network (configured as WPA):

          Cell 02 - Address: 3A:69:14:44:F2:1F
                    ESSID:"tralala"
                    Mode:Ad-Hoc
                    Channel:1
                    Frequency:2.412 GHz (Channel 1)
                    Quality=50/100 Signal level=-56 dBm
                    Encryption key:on
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s
                              48 Mb/s; 54 Mb/s
                    Extra:tsf=0000000010656387

encrypted, but not marked as WPA.

I tried to configure it via the command line, but I'm missing the iwconfig/ifconfig commands for the wireless WPA. I don't want to put them into /etc/network/interfaces to avoid conflicts with my normal setup.