Hi Andreas, On Monday, 4 March 2019 19:44:19 GMT Andreas Fink wrote: > Hello, > I have a problem which uses 100% of one cpu core on my HP-15-bs114ng > notebook.
I had come across the same problem on a mid-2014 MacBook Pro: https://archives.gentoo.org/gentoo-user/message/ 417dfa5af8e9fb76a66fe4816bdc7c44 > I figured out already that it is somehow related to ACPI > interrupts, since the following command will return the system to normal: > echo disable > /sys/firmware/acpi/interrupts/gpe16 Yes, I had to do the same and repeat after each boot. I can't recall if I added this in a script so I didn't have to run it manually each time. > The content of this "file" is the following: > 3749821 STS disabled unmasked > > The first column is the number of interrupts, that happened, which is very > high, hence the 100% cpu usage in one kworker process. > > My question would be the following now: > 1. What could be the side effects of disabling this interrupt? I did not discover any side effects. The CPU would return back to normal and the overheating problem went away. This does not mean some key functionality was not affected, but I never discovered anything relevant. I did not debug the kernel at the time to bottom out what exactly caused this. > 2. What could trigger the interrupt? I don't know. I only had this MacBook Pro for a few months, so I never got to the bottom of it. > 3. How can this be debugged further and reported, i.e. who would be able to > fix it? Have a look here: https://lkml.org/lkml/2011/3/31/144 Then it will need to be reported to BGO and perhaps upstream to kernel devs. > (This happens on all kernels, since I have the notebook, i.e. >= 4.17) If your HP notebook's MoBo or CPU are similar to my 2014 MacBook Pro, then this has been a problem at least since the 3.x series kernel. I hope you get to the bottom of it. -- Regards, Mick
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