On 01/08/2018 11:01 AM, Frédéric wrote:
Hi,

I have upgraded my system from F25 to F27 with dnf system-upgrade.
My laptop screen resolution is Full HD but I get 1024x768 which is awful.

I have an nvidia video card but use the nouveau driver (also tried the
nvidia driver from rpmfusion with the same effect).

At first, I thought it was a Plasma issue because sddm also crashes
when I start a Plasma session but startx from a vtty starts the plasma
desktop without any issue apart from the wrong screen resolution. So I
after some discussion on the KDE list, I now post on the fedora list
hoping for some help from the larger audience.

Thanks,

F
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Initially on upgrade from f25 to f27 with the 4.14.8 kernal I was thrilled to get KDE in 1900x1600 natively but on the update to 4.14.11 the resolution was gone.  I can get full resolution for XFCE4, MATE and GNOME but not KDE.  Currently using the rpmfusion driver nvidia-340xx-340.104 with my GEFORCE GT 610. NOUVEAU is blacklisted.  This is a recurrent problem. Have yet to try the NVIDIA driver NVIDIA-Linux-x86_64-384.90.run which has worked for me in f25.  The drpm update with a new kernal install has not worked in some time but the manual install works and gives full resolution.  Retrieve the driver from NVIDIA for your specific video adapter and google the install process.