notebook / multiple visual displays - activation and control

[Jesse Barnes]

On Monday, March 31, 2008 9:35 am Tom London wrote:
> xrandr probing sometimes appears to "not work right", at least for me.
>
> I have a Thinkpad X60 with intel 945 graphics, 1024x768 LCD.  When
> booting with just the builtin monitor, all works fine.
>
> When booting with 2 different 19" monitors and with the laptop screen
> "shut", X/gdm boots up in a funny hybrid mode, where the interface is
> actually in 1280x1024 (max supported by interface and monitors), but X
> thinks its in 1920x1080 or 1920x1024.  I have to manually enter
> "xrandr --size 1280x1024" each login to get system configured right.

I think that's X failing to setup a reasonable default.  ajax fixed that 
recently though, iirc.

> Here is output of xrandr with non-functioning modes, but after running
> "xrandr --size 1280x1024".
>
> [tbl at localhost ~]$ xrandr
> Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1920 x 1920
> VGA connected 1280x1024+0+0 (normal left inverted right x axis y axis)
> 376mm x 301mm
>    1280x1024      60.0 +   75.0*    60.0     60.0
>    1920x1080      59.9
>    1680x1050      59.9
>    1600x1024      60.2
>    1400x1050      60.0
>    1440x900       59.9
>    1280x960       60.0
>    1360x768       59.8     60.0
>    1280x800       75.0     70.0     60.0
>    1152x864       75.0     75.0     70.0     60.0
>    1280x768       75.0     70.0     60.0
>    1280x720       75.0     70.0     60.0
>    1152x768       54.8
>    1024x768       75.1     75.0     70.1     60.0
>    832x624        74.6
>    800x600        72.2     75.0     60.3     56.2
>    640x480        75.0     72.8     72.8     75.0     60.0     59.9
>    720x400        70.1
> LVDS connected (normal left inverted right x axis y axis)
>    1024x768       50.0 +   60.0     40.0
>    800x600        60.3
>    640x480        60.0     59.9
> [tbl at localhost ~]$

This looks like it's detecting your monitor's modes properly though, are you 
just having problems with your startup configuration if the monitor is 
attached?

Jesse