From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Date: Fri, 16 Nov 2012 12:40:18 +0000 Subject: Re: DQ77KB 100% kworker or high pitch noise Message-Id: <20121116124018.GA12289@kroah.com> List-Id: References: <50A63221.4010806@gmail.com> In-Reply-To: <50A63221.4010806@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org 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