Am Mittwoch, den 03.02.2016, 15:29 -0500 schrieb Samir Parikh:
>  I am running version 5.8 (amd64) on a Lenovo Thinkpad T450s 
> with a fairly default installation.

The T405s is a Broadwell.

> I have a few issues to sort out but my first concern is that I cannot 
> exit out of FVWM.  I launch it via the command startx while logged in
> as 
> root.  When I go to exit (left mouse click on the desktop > Exit),
> the 
> system just hangs which requires me to forcefully power down the
> laptop. 

If you investigate more closely, you will probably find out, that the
system still works, just the graphics is fscked up: Try logging in via
ssh, or shutting down the system by blindly typing into ttyC0.

Broadwell graphics support was added a while ago. IIRC 5.8 should have
some basic support, but still a few bugs. By now (-current) it is petty
stable though.

> Any ideas or suggestions?

1) Use modesetting(4) in xorg.conf and wait for 5.9
2) Avoid the vulnerable code paths (e.g. "shutdown" in wm)
   and wait for 5.9   
3) Update to a recent snapshot.

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