[Bug 89727] [SKL bisected] system hang when changing resolution in games or killing gnome-session twice

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89727

Matt Roper <matthew.d.roper at intel.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

--- Comment #8 from Matt Roper <matthew.d.roper at intel.com> ---
(In reply to Gordon Jin from comment #4)
> (In reply to Damien Lespiau from comment #3)
> > I can't reproduce this one by starting X and killing it, nor by doing init
> > 3/init 5 cycles.
> 
> xinit is not sufficient. Could you try gnome-session as well?

To confirm, you can xinit and kill X as many times as you like without problem,
but if you start a full Gnome session, kill it, start a second Gnome session,
and then kill it again, you see a hang?

I don't have access to a SKL platform, so I'm a bit blind here, but can you try
a few things (assuming my understanding above is correct and also that you
still see this issue on the latest -nightly)?
 - Test with xinit, but make sure you move your mouse into and out of the xterm
that usually gets started by default to ensure the mouse cursor has to
appear/change before you kill X.  I want to rule out the framebuffer reference
counting issues we had with universal cursors recently.
 - Start with xinit, but run xrandr to set varying display modes.  I.e., can we
easily trigger this crash by just switching modes with nothing else going on?

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