Hi All,

I'm running Slackware 13.37 and have dual monitors. My laptop is at resolution 1280x800, and my external monitor (connected by VGA1) should run at 1600x900, but I can't seem to do it; it stays at the laptop resolution.

Through searching, I've tried using xrandr. I needed it to get the monitor to work first, but after that noticing the resolution, everytime I try to change it with:

it gives me the error Does anyone know what I'm doing wrong. I just want to have both monitors working at the same time, but with different resolutions.

Thanks.

You need to run it while logged into X, as the user logged into X, just like any other X application.

Adam

Thanks for the reply, but that is what I am doing. I am using XFCE and have tried running it in the terminal as my own user, and the superuser. Both had the same outcome (the above message).

Any other possible solutions?

Can you show us the output of 'xdpyinfo' ?

Adam

xdpyinfo output:Near as I can tell, instead of seeing 2 monitors, it's seeing 1 very wide monitor (res 2560x800). Still don't know what to do about it

Well the RANDR extension is listed there, as it should be. I have no idea why xrandr isn't working for you.

Adam

Helpful... lol

Could it be that I have to run another program to initialize stuff? I am new to Slackware so I really don't know the ins and outs.

Maybe this will help. When I first plugged in my external monitor, it didn't start up immediately. After reboot it was working, but was mirroring my main display. I had to run and then it worked. This command did run successfully, but I cannot run the commands to try and adjust the resolution without getting that error message.

If you just run 'xrandr' (with the external monitor plugged in), what do you get?

Adam

I just ran it, and I get the message

Now I also just rebooted again, and my monitors have gone back into mirrored mode. I ran xrandr again and this was my output Not sure why a reboot "fixed" that issue, but I am going to try xrandr again and see what happens when I specify the resolution.

Ok, so after the reboot, I successfully went through this article http://www.ubuntugeek.com/how-change...ng-xrandr.html to set the resolution of my external monitor and it worked. I also was able to use to turn off the mirroring.

I don't know why it was failing with that error and another reboot fixed it, but it looks good at the moment. I have the proper resolution and it's not being mirrored so it's all good. I just now have to figure out how to set it to always start that way.

Before I mark it as solved though, does anyone know what might have been causing that? Is it possible some drivers or programs just weren't properly loaded and I needed the reboot? I'm not use to having to reboot a linux OS to resolve issues (although its usually my goto on windows PC's).

Were you, perhaps, running the xrandr command from a screen session?

Adam

I really don't know what that means :s

I don't boot to a command line and run X from there, XFCE starts immediately with the system (run level 4 I think instead of 3). And in there, I was running all of my commands through a regular terminal window. I tried from both my regular user and the super user with the same result.

What do you mean "Screen Session"?

Actually I have noticed 1 issue that is still happening. On my main monitor (the laptop screen, LVDS1), on the bottom, if I move my mouse down there, it will go below the edge of the screen, as if I have another 30-40 pixels of desktop down there. My resolution is still set to 1280x800 on that display according to xrandr, and it was working before I "fixed" the resolution on my external monitor.

Anyone have any ideas on this one? I can't be a coincidence that I fix one monitor and the other screws up...

Thanks.

The way i did to start automaticly, both monitor is to create bash script named .startxrandr



You might want to adjust xrandar options in way to work for you.


and then in .xinitrc file put the

Maybe there is a simple way, but i did it like this.


Cheers