Samsung s19d300 problem with x.org

[ivanx507 at openmailbox.org]

Hello
I want to show us a bug that are happening in x.org
This year i buyed a samsung s19d300 and went i start xubuntu(the distro 
that i have in this time) i noticed that in less than a hour i had a 
terrible visual fatigue, i thinked that was the distro, i tested 10 
different distros and nothing, i think that was the refresh rate, i 
tried to modify with xrand but nothing works.I suppose that is because 
some incompatibility with x.org, samsung not takes cares a lot for linux 
:P, this is.Sorry about to send a message and not to use bugzilla i dont 
now how to use it correctly.
Sorry by my english errors, i'm speak spanish.
Thanks a lot for you attention.