I am able to set the resolution to max and lower values my monitor
supports in 42.2 KDE: Configure Desktop --> Display and Monitor
What is you graphic card/CPU? I had no issues with Intel internal
graphics forever.
If it is not graphic card related, then your problem may be - the
monitor is not auto detected properly hence you cannot use its full
native resolution.
What does xrandr say your max resolution is?
Did you try different cable for the monitor?
Using dual monitors can also cause these problems from time to time -
If I remember correctly - when my monitor setup fails (undock before
full shutdown, or try to dock powered laptop, etc.), I boot to text
mode or as different user and remove this directory:
~/.local/share/kscreen (or was it whole .kde4 dir???) then login again.
I learned to avoid causing myself trouble, so it is hard to remember
now.
There used to be (not anymore) wonderful tool called SaX for resolving
these issues - I believe that it was modifying /etc/X11/xorg.conf
These days everything is autodetected, but you could play with
/etc/X11/xorg.conf.d/50-monitor.conf
See Monitor section of: man xorg.conf
Check this article for guidance: https://en.opensuse.org/SDB:Configurin
g_graphics_cards_and_monitor_settings
As about obtaining correct resolution, hsync, vsync and refresh rates
for your screen - this maybe tricky - you might have to try to
temporarily boot Knoppix or old 13.2 from USB stick and see what they
were using.
Our old Visio TV is causing these kind of (and worse) problems - it is
pretending to be HD, but the panel is some weird non standard, lower,
definitely not HD resolution. So, I get to have similar type of "fun"
from time to time - at least I can resolve it with enough determination
in Linux. There is no chance to get proper image of that beast in
Windows, not that I care (TM).
Good luck, Tomas
On Fri, 2017-04-07 at 22:25 -0700, logical american wrote:
> After upgrading from openSuse 13.2 to Leap 42.2, I have lost the
> 1920x1080 60hz native resolution of my graphics card output to the
> monitor which can easily handle it.
>
> openSuse is running KDE's Plasma 5.8.6 desktop, but I cannot budge
> the
> monitor resolution higher than 1400x1080 despite tinkering with the
> xrandr command to create a new mode and then adding it, which xrandr
> outputs okay, but when I try to activate the new mode using the KDE
> tool
> under Desktop Configure, then Plasma tells me "Cannot change monitor
> resolution"
>
> Has anyone been able to successfully change monitor resolution under
> KDE
> Plasma 5.8.6? I spent at least 2 hours tonight tinkering with the
> settings, but even a local ~/.xprofile file does NOT work. The system
> seems stuck on the odd mode.
>
> Any ideas on how to get back my higher resolution screen? It is
> disappointing to see the screen with a somewhat weird raster and
> letters
> oddly spaced to each other and run together, as my monitor is
> attempting
> to cope with the reduced mode.
>
> - Randall
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