DQ77KB 100% kworker or high pitch noise

DQ77KB 100% kworker or high pitch noise

[Timo]

Hi,

I have an Intel motherboard DQ77KB which has a 2-pin header which says 
panel_off and a fresh Ubuntu 12.10 (3.5.0-18-generic
) install and a display connected via Displayport (DP1, not eDP1). If I 
connect the header in the running system a kworker process pops up with 
100% cpu usage. If I leave the header unconnected no kworker process 
runs, which is good, but a pitch noise comes from the motherboard, 
probably from some voltage regulators.

I am no programmer, and I don't understand much about the kernel. But I 
would like to get the problem solved. If I can be any help, please let 
me know.

Kind regards
Timo

Re: DQ77KB 100% kworker or high pitch noise

[Greg KH]

On Fri, Nov 16, 2012 at 01:31:29PM +0100, Timo wrote:
> Hi,
> 
> I have an Intel motherboard DQ77KB which has a 2-pin header which
> says panel_off and a fresh Ubuntu 12.10 (3.5.0-18-generic
> ) install and a display connected via Displayport (DP1, not eDP1).
> If I connect the header in the running system a kworker process pops
> up with 100% cpu usage. If I leave the header unconnected no kworker
> process runs, which is good, but a pitch noise comes from the
> motherboard, probably from some voltage regulators.
> 
> I am no programmer, and I don't understand much about the kernel.
> But I would like to get the problem solved. If I can be any help,
> please let me know.

Given that you are running the Ubuntu disto, I suggest you file a bug in
their bug tracking system, as they are the best ones that can help track
down this issue for you.

Best of luck,

greg k-h