Re: i915 observations

[RVP <rvp%SDF.ORG@localhost>]

On Wed, 14 Dec 2022, Mayuresh wrote:

> The only time when above problem doesn't trigger is, if I do 'xrandr
> --same-as' to have hdmi a mirror of eDP.
>
> I like to use a vertical hdmi monitor, so above option isn't suitable for
> my usage.
>
> In fact, with hdmi completely out of the picture, if I do 'xrandr
> --rotate' on eDP screen, just to see what happens, the slow refresh occurs
> on eDP also.

xrandr rotation on my laptop display worked fine on Linux. (On NetBSD,
I have to use wsfb--the other drivers are either unusable or hang the
system.)

> Does it mean the acceleration works only in certain mode(s)?

That used to be the case a long time ago if I recall this correctly. Even 
on a single display, rotation implied no accel. But, all this should've been
fixed now. Try it on Linux. Install the xf86-video-intel package if needed,
then copy the xorg.conf file over from NetBSD.

-RVP