KDE plasma second monitor issues after latest update

[CS DBA]

Sorry if this is a duplicate - email issues...


I applied the latest updates today, second monitor capability is still 
broken;

I plug in the HDMI cable, go to system settings --> Display and it only 
show the laptop screen.

The Cinnamon desktop continues to work flawlessly per auto-adding the 
second monitor as soon as I plug the HDMI cable in, thus seemingly 
confirming it's a KDE issue and not a Kernel issue.  I do prefer KDE 
Plasma over Cinnamon, but I need the second monitor to work. Anyone have 
any thoughts on debugging this?

Lenovo X1 Carbon 3rd gen, lspci listing below, thanks in advance




$ lspci
00:00.0 Host bridge: Intel Corporation Broadwell-U Host Bridge -OPI (rev 
09)
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U 
Integrated Graphics (rev 09)
00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller 
(rev 09)
00:14.0 USB controller: Intel Corporation Wildcat Point-LP USB xHCI 
Controller (rev 03)
00:16.0 Communication controller: Intel Corporation Wildcat Point-LP MEI 
Controller #1 (rev 03)
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection (3) 
I218-LM (rev 03)
00:1b.0 Audio device: Intel Corporation Wildcat Point-LP High Definition 
Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root 
Port #2 (rev e3)
00:1c.1 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root 
Port #3 (rev e3)
00:1c.5 PCI bridge: Intel Corporation Wildcat Point-LP PCI Express Root 
Port #6 (rev e3)
00:1d.0 USB controller: Intel Corporation Wildcat Point-LP USB EHCI 
Controller (rev 03)
00:1f.0 ISA bridge: Intel Corporation Wildcat Point-LP LPC Controller 
(rev 03)
00:1f.3 SMBus: Intel Corporation Wildcat Point-LP SMBus Controller (rev 03)
00:1f.6 Signal processing controller: Intel Corporation Wildcat Point-LP 
Thermal Management Controller (rev 03)
04:00.0 Network controller: Intel Corporation Wireless 7265 (rev 59)
0a:00.0 SATA controller: Samsung Electronics Co Ltd Device a801 (rev 01)








On 12/15/2015 11:29 AM, CS DBA wrote:
>
>
> On 12/15/2015 11:11 AM, Duncan wrote:
>> CS DBA posted on Tue, 15 Dec 2015 08:57:24 -0700 as excerpted:
>>
>>> I ran the latest set of updates a few days ago, after the update when I
>>> plugged my second monitor in it was not recognized in the "Display and
>>> Monitor" section of the system settings. If I boot with the monitor
>>> connected it works but only if I boot with it connected.  I have the
>>> cinnamon desktop installed as well and it works as expected, can boot
>>> just the laptop, connect / disconnect monitors, control them from 
>>> system
>>> settings, etc, so it seems it's not a kernel or display driver issue...
>> No immediate thoughts on fixing, but if it worked and now it doesn't,
>> don't you think knowing the version where it worked and where it doesn't
>> might help people solve it?  KDE/kdeframeworks version, plasma version
>> (if frameworks-5 based not kde4 based), qt version, distro and release
>> version, what packages were updated, if you know, etc.
>>
>> It's not like you're posting to a distro list, after all, where most of
>> this stuff can be assumed based on what the distro just updated, and
>> where most people would be running the same versions...
>>
> Oh right, my bad...
>
> Fedora 23, KDE Plasma - based on an rpm -qa it looks like version 5.16:
> $ rpm -qa | grep kf5
> kf5-kfilemetadata-5.16.0-1.fc23.x86_64
> kf5-kconfig-gui-5.16.0-1.fc23.x86_64
> kf5-sonnet-core-5.16.0-1.fc23.x86_64
> kf5-kio-widgets-5.16.0-2.fc23.x86_64
> kf5-frameworkintegration-libs-5.16.0-1.fc23.x86_64
> kf5-kdnssd-5.16.0-1.fc23.x86_64
> kf5-kpty-5.16.0-1.fc23.x86_64
> kf5-kio-core-libs-5.16.0-2.fc23.x86_64
> kf5-filesystem-5.16.0-1.fc23.x86_64
> kf5-ki18n-5.16.0-1.fc23.x86_64
> kf5-kbookmarks-5.16.0-1.fc23.x86_64
> kf5-krunner-5.16.0-1.fc23.x86_64
> kf5-kio-ntlm-5.16.0-2.fc23.x86_64
>
> I've done a fresh install since so I can't tell you what version I was 
> at before, fresh install has the same issues
>
>

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