Ethernet stops working when I use wireless.

[Guest]

Hi, I have a laptop with Kubuntu 12.10 and every time that I connect to a wireless network my wired network stops working.

If I disconnect the ethernet cable and connect to a wireless network the wireless works fine, however when I disconnect the wireless and try to connect using the ethernet cable the DHCP is able to find a IP but whenever I try to ping any IP or I get "ping: sendmsg: Operation not permitted". The only way of getting the ethernet working again is turning off my wireless card and rebooting my laptop.

the output of "lspci":

$ lspci 
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)
00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 4 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM77 Express Chipset LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation Device 0fd4 (rev ff)
03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6235 (rev 24)
04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5289 (rev 01)
04:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 0a)

Does anyone have any idea about what is going on?

[inkrypted]

I have always had problems with the network manager and network manager plasmoid, but I don't use wireless. However I believe that using WICD instead of the network manager and associated plasmoid will solve your problem as I feel they work much better especially with wireless connections. Here is a link which will tell you a bit about wicd.
https://launchpad.net/wicd
It should be avalible via package manager or software center and they have a KDE version called WICD-KDE.

[SteveRiley]

however when I disconnect the wireless and try to connect using the ethernet cable the DHCP is able to find a IP but whenever I try to ping any IP or I get "ping: sendmsg: Operation not permitted".

Please recreate this situation. Then run these commands in a console window:

ifconfig

route -nee

Copy the results here so we can take a look.

[Guest]

The Wicd totally solved my problem!!! Thank you very much!!!!