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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