how do i stop dual displays from booting up mirriored

Once the system is booted and you login, can you setup the display as you desire and all is well?

hi thank you for being there yes i can go into xrandr and rearrange the displays as i want them, i hit the big tick, i then save as. their shows a script saved and i update it. i have a file their i named HP Monitors.sh ( i didnt put .sh ) i have the same problem on the other Dell, its loaded with the same ubuntu 14.04 from the same disk downloaded by torrent. ive looked at Settings Editor/ xftc desktop.( hope this works NO tryed to give you a screen shot) of the 2 dells and the settup DP 1 DP 2. The strange thing for me is i run 3 displays on the OTHER 2 boot mirriored 1 is correct ( on nivida 750 gtx new.Bought because it it does run 3
.) THIS dell has2 displays they boot mirriored. I hope im not confusing the issue. The graphic card nvidia rx 580 quatro is 4 years old with 2 displayports 1 DVI C it will only run 2 displays ( tryed on the old os Win Vista Bissiness before install ssd ) This comp im not playing with like the other, one step at a time. if it helps i have both set up together so i can reference on one transfer solutions to the other

If you can use xrandr in command line, you can add the script to your session startup and make the display as you wish. Is the script file you named designed to do this or is it for something else?

hi i d
unable to open the file to see the script, ive tryed. maybe i should have booted with one display and added the other the next day trawling around trying to find a solution, lead to alot of dead ends. I have updated as soon as posible after install. i see a brief flash of some type of script on shut down and start up. to be honest trying to digest anything to do with the comand line. i could only cut and paste. ( ive broken and reloaded ubuntu 3 times on the other one )that why im being good to this one. on the other comp theirs 3 folders with script files in xrandr this comp 1folder with script file size 155kb

If you run:

xrandr --ouput VGA2 --right-of VGA1

After a reboot, is it ok? If you get mentions about unknown devices then run:

xrandr

and note the display names.

boday@boday-T3500-studio:~$ sudo xrandr --ouput VGA2 --right-of VGA1
[sudo] password for boday:
xrandr: unrecognized option '--ouput'
Try 'xrandr --help' for more information.
boday@boday-T3500-studio:~$ xrandr -ouput VGA2 -right -of VGA1
xrandr: unrecognized option '-ouput'
Try 'xrandr --help' for more information.
boday@boday-T3500-studio:~$

i copyed and paste was that the right thing to do

both monitors are listed as dp1 dp2 tryed that didnt help
what other info can i give thanks

Typo error, must be --output instead of --ouput

boday@boday-T3500-studio:~$ sudo xrandr --output VGA2 --right-of VGA1
[sudo] password for boday:
warning: output VGA2 not found; ignoring
boday@boday-T3500-studio:~$ sudo xrandr --output VGA2 --right-of VGA1
warning: output VGA2 not found; ignoring
boday@boday-T3500-studio:~$ sudo xrandr --outputVGA2 --right-ofVGA1xrandr: unrecognized option '--outputVGA2'
Try 'xrandr --help' for more information.
boday@boday-T3500-studio:~$ sudo xrandr --output DP2 --right-of DP1
warning: output DP2 not found; ignoring
boday@boday-T3500-studio:~$ sudo xrandr --output DP1 --right-of DP0
warning: output DP1 not found; ignoring
boday@boday-T3500-studio:~$
 i might be getting tired and making mistakes i can not see its after 12 at night over here i tryed with lower case vga as well

"...both monitors are listed as dp1 dp2 tryed that didnt help..."

Then it must be

sudo xrandr --output dp1 --right-of dp2
or
sudo xrandr --output dp2 --right-of dp1

boday@boday-T3500-studio:~$ sudo xrandr --output dp2 --right-of dp1
[sudo] password for boday:
warning: output dp2 not found; ignoring
boday@boday-T3500-studio:~$ sudo xrandr --output dp1 --right-of dp2
warning: output dp1 not found; ignoring
boday@boday-T3500-studio:~$

it seems to stuck on the first output no mater what follows i have tryed 0,1 1,0 as well ive still got my hair and im not pulling it out over this no matter how much ubuntu want me to. and to think i havent even got around to JACK and MIDI in studio yet

What is the output of

sudo xrandr --query

Screen 0: minimum 320 x 200, current 3200 x 900, maximum 8192 x 8192
DVI-I-1 disconnected (normal left inverted right x axis y axis)
DP-1 connected 1600x900+1600+0 (normal left inverted right x axis y axis) 443mm x 249mm
   1600x900 60.0*+
   1280x1024 60.0
   1440x900 59.9
   1280x720 60.0
   1024x768 60.0
   800x600 60.3
   640x480 60.0
   720x400 70.1
DP-2 connected 1600x900+0+0 (normal left inverted right x axis y axis) 443mm x 249mm
   1600x900 60.0*+
   1280x1024 60.0
   1440x900 59.9
   1280x720 60.0
   1024x768 60.0
   800x600 60.3
   640x480 60.0
   720x400 70.1
boday@boday-T3500-studio:~$

thanks for staying with it. if this is reading right how do i keep it that way

what if i plug into the DVI

Screen 0: minimum 8 x 8, current 3200 x 900, maximum 8192 x 8192
DVI-I-0 disconnected primary (normal left inverted right x axis y axis)
DVI-I-1 disconnected (normal left inverted right x axis y axis)
DP-0 connected 1600x900+1600+0 (normal left inverted right x axis y axis) 443mm x 249mm
   1600x900 60.0*+
   1440x900 59.9
   1280x1024 60.0
   1280x720 60.0
   1024x768 60.0
   800x600 60.3
   640x480 59.9
DP-1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 443mm x 249mm
   1600x900 60.0*+
   1440x900 59.9
   1280x1024 60.0
   1280x720 60.0
   1024x768 60.0
   800x600 60.3
   640x480 59.9
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
boday@boday-T3500-studio:~$

and this what happened Anyway i have some things to play with i kinda get what xrandr about and can use what you gave me. looking above it would seem i might be a go to connect one monitor to DVI wants to be primary. if i get it right first go the sceen and moments between of the cursor will be how i want them. At the moment i can pick up settings screen and make it go clockwise in a complete circle around me with out stopping or changing direction and spin the other way in a circle around without stopping. NEVER seen that before. i like it. another new thing is desktop background dis appeared on one monitor, when i move the desktop set desktop over to change it all the backgrounds grey out and its impossible to set one bring it back to other display i can set any desktop i want. sooo i play around for awile at 2-30 in the morning and let you go. ill make a post tommorow and tell jokes to my friends about thanks and its only the begining

OMG it worked used DVI and NOT MIRRIORED mouse jumps the right way like me at the moment yeah isnt the world a great place thanks again

Add the command to your startup and it will run at boot. Thanis to Manfred for sorting the finer details :)

Thanks Manfred Hampl, that solved my question.