Im trying to find the H and V sync rates for the LCD in

Ted Mittelstaedt tedm at
Sat Nov 19 06:55:56 GMT 2005


  My experience with LCD's is that they have a computer that
basically ignores the refresh rate you send to them.  Remember
that an LCD changes state in response to a voltage through it, it
is not like a phosphor that is hit by a scanned beam then decays
at a set rate.  Each LCD pixel on a LCD panel basically as a
complete driver transister devoted to it, it is not like a picture
tube that is beam-scanned.  There is no real 'refresh' rate of
an LCD panel.  The only thing that is necessary is that the
output of your video card is running at a clock rate that is
understandable to the computer in the LCD display that is
receiving the signal.

  Just pick the maximum sync rates available, if it is too
high the LCD display will ignore it and nothing will display
on screen, you can then try again with a lower value.


>-----Original Message-----
>From: owner-freebsd-questions at
>[mailto:owner-freebsd-questions at]On Behalf Of Eric Murphy
>Sent: Wednesday, November 16, 2005 4:56 PM
>To: Greg Barniskis
>Cc: freebsd-questions at
>Subject: Re: Im trying to find the H and V sync rates for the LCD in
>Greg Barniskis wrote:
>> Greg 'groggy' Lehey wrote:
>>> On Tuesday, 15 November 2005 at 19:15:51 -0600, Eric Murphy wrote:
>>>> A Inspiron 9300, I cant seem to find this info ANYWHERE,
>and i want to
>>>> configuer Xorg :)   Can anyone point me in the right direction?
>>> What happens when you run this (from a text-mode terminal)?
>>>   X  -configure
>> If that doesn't work, I think I found the specs for my 9200 last
>> summer (shamefully, *not* in the Dell User's Manual) by Googling on
>> the LCD part number rather than "Inspiron". Check your invoice for
>> details.
>> Mine's a Samsung product, I think. I'm sure I have my notes from that
>> episode somewhere; post back if nothing else works and I'll
>try to dig
>> them up, or at least share my working xorg.conf.
>> YMMV. Which LCD type is it (WUXGA, WSXGA, other)? Hmm... perhaps that
>> is why the Inspiron owner's manual is so vague on this subject; the
>> actual display specs may vary depending on what options you choose.
> Its a WUXGA :)
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