Thank you so much for your incredible help. On this Asus X552C and Network controller: MEDIATEK Corp. MT7630e 802.11bgn Wireless Network Adapter the #125 and #154 solved the problem.
But... I'm noticing a strange and continuos spike in the CPU activity: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 21 root 20 0 0 0 0 R 100.0 0.0 16:10.98 ksoftirqd/1 '/1' depends on the CPU used obviously. If I disable the WiFi connection, everything comes back to normal. I hope this can be useful... any suggestion? Linux linuxbox 3.13.0-34-generic #60-Ubuntu SMP Wed Aug 13 15:45:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1220146 Title: Need support for new Ralink Wifi card - Mediatek 7630 [14c3:7630] Status in HWE Next Project: Confirmed Status in HWE Next trusty series: Confirmed Status in The Linux Kernel: Confirmed Status in “linux” package in Ubuntu: Confirmed Status in “linux” source package in Raring: Incomplete Status in “linux” source package in Saucy: Incomplete Status in “linux” package in Fedora: New Bug description: This device is appearing in some OEM machines, but driver is not yet available in mainline. The driver seems to be present in machines with pre-installed OS, but isn't available on the download-and-install versions! To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1220146/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp