[elrepo] help troubleshooting detection of external monitor

[Denis Leclair]

I've pulled my Xorg logs in case they might useful in providing clues:

More logs for clues:

Xorg.0.log:http://pastebin.centos.org/8891/

Xorg.0.log.old:http://pastebin.centos.org/8896/

Xorg.1.log:http://pastebin.centos.org/8901/

Xorg.9.log:http://pastebin.centos.org/8906/




On 04/15/2014 05:14 PM, Denis Leclair wrote:
>
> That's correct Alan. For other people's benefit in case you haven't 
> gone to my post on the CentOS forum, xrandr is not returning anything 
> for the VGA port or any other port for that matter. The output is 
> shown here:
>
> Output from xrandr:
>
> CODE:SELECT ALL 
> <https://www.centos.org/forums/viewtopic.php?f=21&t=45930#>
>     |[dleclair at dleclair-lptp Downloads]$ sudo xrandr -q
>     [sudo] password for dleclair:
>     xrandr: Failed to get size of gamma for output default
>     Screen 0: minimum 1920 x 1080, current 1920 x 1080, maximum 1920 x
>     1080
>     default connected 1920x1080+0+0 0mm x 0mm
>        1920x1080       0.0*
>     [dleclair at dleclair-lptp Downloads]$
>     |
>
>
>
>
> On 04/15/14 4:10 PM, Alan Bartlett wrote:
>> On 15 April 2014 21:09, Alan Bartlett<ajb at elrepo.org>  wrote:
>>> On 15 April 2014 20:41, Denis Leclair<denis at theleclairs.ca>  wrote:
>>>> I have CentOS 6.5 running on an HP EliteBook 840 G1 with kernel-ml. The
>>>> problem is, I'm not getting any detection of the external monitor that I
>>>> have plugged in to the VGA port. I'm not sure where to beging
>>>> troubleshooting this problem and I'm not finding a whole of advice online
>>>> either.
>>>>
>>>> The details of what I get from xrandr as well as other system information
>>>> can be found on this post I added to the CentOS forums:
>>>> https://www.centos.org/forums/viewtopic.php?f=21&t=45930
>>>>
>>>> I would appreciate any advice on things that I should check for or
>>>> additional reading I can do on the topic.
>>>>
>>>> Thanks.
>>> I'd suggest that you consider using xrandr.
>>>
>>> Look to see what interfaces it recognises, by default. Plug in the
>>> external monitor and use xrandr to activate the interface.
>>>
>>> For example, with my Dell Latitude E5500 I see the following --
>>>
>>> [Duo2 ~]$ xrandr
>>> Screen 0: minimum 320 x 200, current 1280 x 800, maximum 8192 x 8192
>>> LVDS1 connected 1280x800+0+0 (normal left inverted right x axis y
>>> axis) 331mm x 207mm
>>>     1280x800       60.0*+   59.8     59.9     40.0
>>>     1280x768       59.9     60.0
>>>     1024x768       60.0
>>>     800x600        60.3     56.2
>>>     848x480        60.0
>>>     640x480        59.9
>>> VGA1 disconnected (normal left inverted right x axis y axis)
>>> HDMI1 disconnected (normal left inverted right x axis y axis)
>>> DP1 disconnected (normal left inverted right x axis y axis)
>>> HDMI2 disconnected (normal left inverted right x axis y axis)
>>> DP2 disconnected (normal left inverted right x axis y axis)
>>> DP3 disconnected (normal left inverted right x axis y axis)
>>> TV1 disconnected (normal left inverted right x axis y axis)
>>> [Duo2 ~]$
>>>
>>> Alan.
>> Oops. Ignore that. I now see that you have already looked into using xrandr.
>>
>> Alan.
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>

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