(In reply to cthx from comment #6)
> acpi=noapic doesn't help this.
>
> I think the regression was made in 4.2.x or 4.3.x (4.2.x kernels have a
> backlight issue on my laptop, so I use 4.1.x)
what do you mean by backlight issue?
If the platform is still alive, please run git-bisect to find out which commit introduces the problem.
(In reply to cthx from comment #6)
> acpi=noapic doesn't help this.
>
> I think the regression was made in 4.2.x or 4.3.x (4.2.x kernels have a
> backlight issue on my laptop, so I use 4.1.x)
what do you mean by backlight issue?
If the platform is still alive, please run git-bisect to find out which commit introduces the problem.