[Intel-gfx] screen freeze with 5.2-rc6 Dell XPS-13 skylake i915

[James Bottomley]

On Sat, 2019-06-29 at 11:56 -0700, James Bottomley wrote:
> The symptoms are really weird: the screen image is locked in place. 
> The machine is still functional and if I log in over the network I
> can do anything I like, including killing the X server and the
> display will never alter.  It also seems that the system is accepting
> keyboard input because when it freezes I can cat information to a
> file (if the mouse was over an xterm) and verify over the network the
> file contents. Nothing unusual appears in dmesg when the lockup
> happens.
> 
> The last kernel I booted successfully on the system was 5.0, so I'll
> try compiling 5.1 to narrow down the changes.

I've confirmed that 5.1 doesn't have the regression and I'm now trying
to bisect the 5.2 merge window, but since the problem takes quite a
while to manifest this will take some time.  Any hints about specific
patches that might be the problem would be welcome.

James