LXDE and dual monitors?

bjorntj · 2012-06-12 08:45:47

I am trying out LXDE and I have a problem. I use TwinView for my two monitors and it's working as it should using XFCE. But when i use LXDE, the second monitor is just black and nothing happens when I click on the desktop... What am I missing?

Regards,

BTJ

XxTeosxX · 2012-07-02 13:37:32

dual monitor, xrandr.

$ xrandr --output VGA-0 --auto --left-of DVI-0

Internal/external display names you can check:

$ xrandr -q

ismaelvc · 2012-07-02 14:38:56

What happens when the other monitor is not recognized:

ismaelvc@toybox ~ $ xrandr -q
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 320 x 175, current 1024 x 768, maximum 1024 x 768
default connected 1024x768+0+0 0mm x 0mm
   1024x768       87.0*    85.0     75.0     70.0     60.0     81.0  
   832x624        75.0  
   800x600        85.0     75.0     72.0     60.0     56.0  
   640x480        85.0     75.0     73.0     60.0  
   720x400        85.0  
   640x400        85.0  
   640x350        85.0  
   512x384        87.0     85.0     75.0     70.0     60.0  
   416x312        75.0  
   400x300        85.0     75.0     72.0     60.0     56.0  
   320x240        85.0     75.0     73.0     60.0  
   360x200        85.0  
   320x200        85.0  
   320x175        85.0

ismaelvc@toybox ~ $ xrandr --output VGA-0 --auto --left-of DVI-0
xrandr: Failed to get size of gamma for output default
warning: output VGA-0 not found; ignoring

Still the monitor works but it only mirrors, whatever is displayed at my laptop.

Does this means it can't be done? All the examples in the wiki and other forums, assume "xrandr -q" displays correctly all atached monitors.

Thanks in advance!

Gusar · 2012-07-02 14:49:46

ismaelvc wrote:

What happens when the other monitor is not recognized:

It means you're running an old nvidia driver which does not support xrandr1.2. When is the last time you updated? The [extra] repository has nvidia-302.17 which does support xrandr1.2.

If you're using an older driver, xrandr is not the way to configure dual monitors, twinview is, so consult documentation on that. Basically, use nvidia-settings.

ismaelvc · 2012-07-02 15:30:06

Ok thanks! Im sorry I didn't specify my driver wich is:

xf68-video-mach64 (dri enabled)
mach-dri
mach64drm (AUR)

I guess it's just not possible then with this hardware, but I will try building an older version of xrandr (is it possible? I don't know what depends of it, I don't really undersatnd pactree output) and I will try twinview also.

thanks!

EDIT: It seems many things depend on "libxrandr", I have also tried autorandr from aur, with no luck.

Last edited by ismaelvc (2012-07-02 15:34:31)

Gusar · 2012-07-02 15:46:33

Ah, interesting. You said "twinview" which is something that's specific to the nvidia driver. But you do not have nvidia graphics.

No idea what the state of xrandr for mach64 is. It seems it's not supported, which kinda surprises me. I'll search around, see what I can find out.

Arch Linux

#1 2012-06-12 08:45:47

LXDE and dual monitors?

#2 2012-07-02 13:37:32

Re: LXDE and dual monitors?

#3 2012-07-02 14:38:56

Re: LXDE and dual monitors?

#4 2012-07-02 14:49:46

Re: LXDE and dual monitors?

#5 2012-07-02 15:30:06

Re: LXDE and dual monitors?

#6 2012-07-02 15:46:33

Re: LXDE and dual monitors?

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