Claudio Jeker <cje...@diehard.n-r-g.com> wrote:

> On Sat, May 25, 2019 at 03:53:03PM +0100, Maurice McCarthy wrote:
> > On 25/05/2019, Timo Myyrä <timo.my...@bittivirhe.fi> wrote:
> > > Tristan Pilat <cont...@tristanpilat.com> writes:
> > >
> > >> Hi OpenBSD users and devs!
> > >>
> > >> I got a new laptop in January, a thinkpad x280. At that time my system
> > >> running 'current' was very slow and I assumed the video acceleration
> > >> wasn't working so I just sadly stuck with Debian for a while. I then
> > >> saw that an update of the inteldrm landed in current a month ago or so
> > >> so I tried yesterday to reinstall current. Unfortunately the system is
> > >> still barely usable. Could you guys tell me why the video acceleration
> > >> isn't handled? Isn't Kaby lake compatible for now? I saw this article
> > >> (https://jcs.org/2017/05/22/xiaomiair) which says it is.
> > >>
> > 
> > You may have to adjust the aperture
> > See /etc/examples/sysctl.conf
> > 
> > #machdep.allowaperture=2    # See xf86(4)
> > 
> 
> Nope. That does not help. I bet the issue is not related to anything
> related to inteldrm. It is most probably an interrupt storm happening
> because of Thunderbolt 3. At least that seems to be something people
> complained about.

Same sort of thing happened with x1rev6, but various folk figured out BIOS
options which could prevent it, and newer BIOS replacements also improved
the situation.  Please study it and see if you can find some clues.

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