Log-in prompt often on wrong monitor in dual monitor setup

Asked by Henning Knut Skoglund

I often get the log-in prompt on the wrong monitor (VGA-0) in a dual monitor setup with a laptop panel (LVDS) and an external LCD TV (VGA-0). So I have a situation with a black screen on LVDS (i see the mouse cursor in the intersection between the monitors on the left edge of LVDS) and the log-in prompt displayed on VGA-0 which is also black (turned off). Is this related to lightdm and why not always use the primary monitor (LVDS) for login-prompt?


Screen 0: minimum 320 x 200, current 3320 x 1080, maximum 8192 x 8192
VGA-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 886mm x 498mm
LVDS connected primary 1400x1050+1920+0 (normal left inverted right x axis y axis) 287mm x 215mm
DVI-0 disconnected (normal left inverted right x axis y axis)


                description: VGA compatible controller
                product: RV515/M54 [Mobility Radeon X1400]
                vendor: Advanced Micro Devices, Inc. [AMD/ATI]

lightdm --version : lightdm version 1.8.5
uname -r : 3.11.0-19-generic
ubuntu: 13.10


<monitors version="1">
      <output name="VGA-0">
      <output name="LVDS">
      <output name="DVI-0">

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Solved by:
Robert Ancell
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Best Robert Ancell (robert-ancell) said :

This depends on what greeter you are using, I'll assume it's the Ubuntu default (unity-greeter).

This may have been fixed in Ubuntu 14.04:

Revision history for this message
Henning Knut Skoglund (hkskoglund) said :

Thanks Robert Ancell, that solved my question.