[Bug 96767] ThinkPad T450: RetroArch refuses to go back into windowed mode after fullscreen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=96767

--- Comment #28 from Diego Viola <diego.viola at gmail.com> ---
(In reply to Chris Wilson from comment #27)
> (In reply to Diego Viola from comment #26)
> > (In reply to Chris Wilson from comment #14)
> > > The chvt will cause a modeset which will flush the vblank queue (more
> > > evidence that is a "lost" event in the kernel as opposed to userspace
> > > missing the event enitrely). This will be very noisy, but I wonder if a
> > > drm.debug=0xff dmesg will have a clue (you will probably also need to
> > > increase the dmesg to say log_buf_len=10M) when you hit the hang and then
> > > chvt.
> > 
> > Chris, you mentioned this was a possible kernel bug, but I got that commit
> > that is causing this in xf86-video-intel.
> > 
> > Do you have any suggestions please?
> 
> I've run over 96hours on xf86-video-intel/test/dri2-race that captures all
> of the issues you have hit so far and more. Both xorg-1.18.0 (as
> demonstrated earlier and fixed) and xorg-1.19-rc are buggy. That change just
> moves a spurious early signal to the later pending flip, i.e. expanding the
> race window. It is not the culprit you think it is.

Weird.

I built xf86-video-intel from git and I was able to reproduce it, the issue is
still there.

I made a video here to demonstrate the issue:

https://dl.dropboxusercontent.com/u/6005119/VID_20161005_124021.mp4

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20161005/bfdd47de/attachment-0001.html>