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[thomas damrau <thomas.damrau@xxxxxxxx>]

I do not understand why it is so difficult to fix this bug. There is not
mysterious feature in the new kernel that prevents the WiFi to work.

The root cause is a minor syntactically issue in the source:
1) structure / content of the kernel header files changed
2) this makes the re-compilation of the WiFi driver fail with every new kernel (I doubt the next release candidate will be different)
3) since the compilation fails -> there is after the kernel update simply no Ralink driver included in the kernel (no mystery !)
I explaind under https://answers.launchpad.net/ubuntu-certification/+question/238136 how you can compile the Ralink driver under .55 und .56. The workaround described is of course not a permanent solution. However, by changing the source code of the driver module you can fix the issue within minutes.

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https://bugs.launchpad.net/bugs/1243693

Title:
  RT3290 12.04 new kernel

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  The  problem dates on 22. oct 2013 Linux Ubuntu 12.04 LTS 64 Bit
  - Update to Kernel 3.2.0-55
  - rebboot and WLAN function gone
  the last Kernel 3.2.0-54 was no problem with the Ralink Corp RT3290 Wireless 802.11 n 
  lspci still shows the chip
  iwconfig shows no wireless extentions 

  The Ralink is in many HP Notebooks like the HP 655

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