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[George Moutsopoulos <1220146@xxxxxxxxxxxxxxxxxx>]

with tobiasbora solution i also get 100% cpu on ksoftirqd
I am not sure if it helps but trying acpi=off the module does not load and I get a multitude of the messages

===>rt2x00lib_start
genirq: Flags mismatch irq 0. 00000080 (0000:03:00.0) vs. 00015a00 (timer)
phy0 -> rt2x00lib_start: Error - IRQ 0 allocation failed (error -16).

As an aside, would it help if more people contact mediatek? I sent a
question on their webform but haven't received a reply.

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https://bugs.launchpad.net/bugs/1220146

Title:
  Ralink Mediatek 14c3:7630 wi-fi card isn't supported out of the box

Status in HWE Next Project:
  Confirmed
Status in HWE Next trusty series:
  Confirmed
Status in The Linux Kernel:
  Unknown
Status in linux package in Ubuntu:
  Triaged
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!

  The driver that upstream is working on can be found at
  https://github.com/lwfinger/mt7630.

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