Re: [gentoo-user] New HD monitor stretches everything. How to teach Xorg?

[Mick <michaelkintzios@gmail.com>]

On 25 August 2010 15:38, Paul Hartman <paul.hartman+gentoo@gmail.com> wrote:
> On Wed, Aug 25, 2010 at 9:25 AM, Mick <michaelkintzios@gmail.com> wrote:
>> On 25 August 2010 15:17, Paul Hartman <paul.hartman+gentoo@gmail.com> wrote:
>>> On Tue, Aug 24, 2010 at 7:03 PM, Kevin O'Gorman <kogorman@gmail.com> wrote:
>>>> I found the specs with Hsync and VSync limits, but they don't mention the
>>>> clock speed.  I guess I'll just have to fool with it until it works or
>>>> catches fire.
>>>
>>> That basically describes the way I've done my X monitor settings for
>>> the past 10 years or so. I just made up a bunch of numbers and hope
>>> they accidentally work. :) Now I'm thankful for EDID in monitors and
>>> smarter video drivers.
>>
>> I think that if xrandr -q does not show the resolution you are
>> seeking, then the video card or driver in question cannot provide it.
>> I'm not sure that feeding xorg any odd modeline will change things,
>> plus unlike a CRT monitor, LCDs only provide a clear image at their
>> native resolution (denoted by '+' in the xrandr list of resolutions)
>
> I've been able to generate modelines in the past for all kinds of
> crazy non-standard resolutions. I think the ones listed may be the
> ones defined in the card's BIOS.
>
> I just remembered about CVT, I think it's what I used to generate the
> modelines I posted earlier. It is part of the x11-base/xorg-server
> package and will generate the frequencies and everything for you based
> on VESA standards. You simply give it X and Y resolution and it does
> the rest. For example:
>
> $ cvt 1280 720
> # 1280x720 59.86 Hz (CVT 0.92M9) hsync: 44.77 kHz; pclk: 74.50 MHz
> Modeline "1280x720_60.00"   74.50  1280 1344 1472 1664  720 723 728
> 748 -hsync +vsync

Fair enough, but anything other than the native resolution on an LCD
monitor will end looking distorted or blurred.
-- 
Regards,
Mick