I filed a bugzilla report. It's
https://bugzilla.redhat.com/show_bug.cgi?id=1397864
Meanwhile I did some more poking around and found something that appears
very interesting. To quote a comment I added to the above bugzilla report:
==================================================
Apparently, kernels newer than 4.8.4 think my system has 2 monitors
attached to it. It only has one. It has never had two. I'm using the
embedded graphics for my one and only monitor. I have never added a
second video card. When I run the KDE system settings app and use the
display applet, it sees my main monitor and second monitor it describes
as a laptop monitor. This system is not a laptop. It is a desk-side
system. Only kernels newer than 4.8.4 (ie, 4.8.8.and 4.8.10) show this.
The 4.8.4 kernel correctly determines I only have one monitor.
==================================================
I've got a workaround for now. I can run system setting and choose the
display and monitor applet. That's where I see two displays. After
some back and forth I've found that clicking "Unify Outputs" gives me
one display. Icons are all messed up but I can live with that for now.
Charlie
On 11/22/2016 05:27 PM, Charles R. Dennett wrote:
Thanks for the suggestion. I removed the xorg-x11-dev-intel package
and
rebooted on the 4.8.8 kernel. It did not help. Same situation. Looks
like it's using the modesetting driver from what I see in Xorg.0.log.
I'll keep looging.
Charlie
On 11/21/2016 10:49 PM, Felix Miata wrote:
> Charles R. Dennett composed on 2016-11-20 08:46 (UTC-0500):
> ...
>
> Do you have any optional repos installed?
>
> I have no Skylake systems, but I do have multiple versions of Fedora on
> multiple multiboot systems with Intel video. KDE in F24 is fine on all that I
> can recall, but not so with F25 and Rawhide, which on at least one (older
> than yours, Eaglelake) machine exhibits symptoms similar to what you report.
> The difference I see is that F25 and Rawhide are now using server 1.19rc1,
> while F24 (running 4.8.7 currently booted on host big41) remains on 1.18.4.
>
> Regardless whether a 1.19 server is present, you could try the driver
> integrated into the server, "modesetting", (most easily) by uninstalling
> xorg-x11-drv-intel.
>
> The modesetting driver seems to be the future of X regardless of gfxchip:
>
http://www.phoronix.com/scan.php?page=news_item&px=Ubuntu-Debian-Aban...
>
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