4K monitors?

[don fisher]

On 07/03/14 15:26, Tom Horsley wrote:
> On Thu, 03 Jul 2014 15:11:34 -0700
> don fisher wrote:
>
>> Can you tell me where documentation exists on how to set up the XWindow
>> system. I used /etc/X11/xorg.conf in the past, but that all appears to
>> have been replaced by something I cannot find.
>
> You don't, it "just works" (except when it doesn't). All the info
> is supposed to come from the EDID reported by the monitor. Any
> tweaks are done at runtime via xrandr, xinput, etc. (which may or
> may not be supported by some GUI setting tool that (maybe) remembers
> and reproduces the settings via things like the gnome
> settings daemon).
>
> On my system at home, I have to override the EDID info to make
> the system believe I have a 47 inch monitor and not a 7 inch
> monitor with incredibly dense resolution :-). This has all
> the same info you used to be able to put in xorg.conf, but now
> it comes in a semi-documented binary file with no good tools
> to edit it instead of an ascii text file. Such an improvement :-(.
>
Thanks for getting back. I have a laptop that attach an external monitor 
to when I am at home. Until today, it always came up in single screen 
mode, duplicated on both monitors. I had a power failure, and now the 
system is treating them as two monitors side by side. I am an old timer 
an prefer the days of the xorg.conf setup. Any ideas on where the button 
for single screen is hidden?

Thanks
Don