video equipment still forcing my laptop to a lower res, argh
Ed.Greshko at greshko.com
Tue Sep 9 11:29:46 UTC 2008
Robert P. J. Day wrote:
> Quoting Ed Greshko <Ed.Greshko at greshko.com>:
>> Ed Greshko wrote:
>>> Robert P. J. Day wrote:
>>>> ok, i've fought with this for a bit but still have no solution. to
>>>> recap, dell inspiron 9200, WUXGA (1920x1200) display, now running F9,
>>>> runs in full WUXGA mode out of the box perfectly.
>>>> the instant i connect via VGA to a video processing unit (sorry, i
>>>> can't be more specific, i'm not allowed), when i restart the X server,
>>>> it comes up in 1152x864. why is this? what is it about X that
>>>> connecting to an external VGA destination will drive the resolution on
>>>> the laptop lower? i'm baffled.
>>> The first place I would look is in /var/log/Xorg.0.log and determine if
>>> there is a difference between when X starts with the unit connected and
>>> when not connected. The log file is generated upon X starting.
>> I should have added that this is probably hardware related. Chances are
>> the video chipset detects that it is attached to an external device and
>> the external hardware is limited to the lower resolution and thus
>> reports this at X startup.
> i'd thought of that, but i was *assured* by people who should know that
> the external hardware is not reporting anything back to the laptop. and
> forgive my video-related ignorance, but what is *normally* reported back?
> in what format? and is there a way to tap that info in real time (a la
> tcpdump)? or is just checking the X log file the way to go? thanks.
It may not be reporting anything at all. The chipset simply detects
electrical connections on the external jack and does its thing. I think
you will see a difference in the log file that indicates the higher
resolutions are not supported...I forget the exact wordings
You worry too much about your job. Stop it. You are not paid enough to
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