On Thu, Feb 1, 2018 at 9:40 AM, Andy Lutomirski <luto@xxxxxxxxxx> wrote: > Hi- > > As requested in your blog post, I tested PSR. I see something like > 2.69W with PSR off and 2.17W with PSR on. Screen blanking, > suspend/resume, and the contents of the screen all seem okay. This is > a Dell XPS 13 9350, i.e.: > > System Information > Manufacturer: Dell Inc. > Product Name: XPS 13 9350 > > EDID is attached. > > *However*, I do see one unfortunate side effect of turning on PSR. It > seems that, when I move my cursor a little bit after a few seconds of > doing nothing, there seems to be a little bit of lag, as if either a > few frames are dropped at the beginning of the motion or maybe the > entire motion is delayed a bit. I don't notice a similar delay when > typing, so I'm wondering if maybe there's a minor driver bug in which > the driver doesn't kick the panel out of PSR quite as quickly when the > cursor is updated as it does when the framebuffer is updated. > I'm also getting occasional messages like: [ 2675.574486] [drm:intel_pipe_update_start [i915]] *ERROR* Potential atomic update failure on pipe A with PSR on. But there is nowhere near one of these messages per tiny lag incident. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
