display/GFX issue with Ubuntu 16.04 not seen in 14.04

[Felix Miata]

Thomas Lübking composed on 2016-08-23 16:49 (UTC+0200):

> On Tue, Aug 23, 2016 at 06:53:13AM -0400, Jim Abernathy wrote:
...
>>>I've tried this on different computers all with Intel GFX. same results.
...
> Though this is very most likely a bug in the kernel and not in X11,
> check whether you're using the intel (likely) or the modesetting driver,
> then use the other one (uninstalling xf86-video-intel could be
> sufficient for this, but I never used ubuntu. Ask them.)

http://www.phoronix.com/scan.php?page=news_item&px=Ubuntu-Debian-Abandon-Intel-DDX 
seems a decent summary of the Intel vs. Modesetting driver situation. The 
Modesetting driver was moved from a standalone package into the server in 
1.17.0, long before 16.04 with server 1.18.3 was released. So far, all my 
Intel gfx installations that work at all with the Modesetting driver work at 
least as well as they ever did with the Intel driver.

> Since it's also likely a bug in the kernel, check "dmesg | grep intel"
> before doing so. You might face the same issue as this guy:
> https://bbs.archlinux.org/viewtopic.php?id=216088
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