Kernel 4.1.4 breaks external display

[CS DBA]

On 08/31/2015 08:34 PM, Ed Greshko wrote:
> On 08/21/15 23:41, CS DBA wrote:
>> I'm running Fedora 21 on a Dell M3800 laptop, been working great.
>> Updating to the latest kernel however breaks my external display
>> i.e. I plug the external monitor in and nothing happens, previous to the
>> update when I plug in the external monitor
>> the system would auto configure the second screen and I could use both
>> monitors.
>>
>> I've googled the issue but not found anything.
>>
>> Thoughts?
> Several thoughts come to mind...
>
> 1.  What desktop are you using?  GNOME. KDE, xfce, something else
KDE

> 2.  Did you try going back to a working kernel?
Yes, I had an rsync of the system from before the updae, running now
with kernel 4.0.8-200 and it works


> 3.  It seems as if you're saying you've booted without the monitor attached and plug it in later?  Yes?  If so, have you tried booting with the monitor already attached?   Or, attaching the monitor and then logging out/in?

I've tried all of the above with the updated kernel, no luck. The second
screen remains blank and I cannot move the mouse past the edge of the
laptop screen irrespective of if I boot / login with the monitor
attached or not


I'm running the nouveau driver and an lspci shows I have this video card:
NVIDIA Corporation GK107GLM [Quadro K1100M] (rev a1)



>