On Sat, Oct 17, 2009 at 12:56 PM, Richard Marza <richardmar...@optonline.net
> wrote:
> ---- Original Message -----
>
> *From:* Kevin O'Gorman <kogor...@gmail.com>
> *To:* gentoo-user@lists.gentoo.org
> *Sent:* Saturday, October 17, 2009 3:42 PM
> *Subject:* Re: [gentoo-user] Desperately seeking modelines; xorg
> 1.6.3.901-r2bleeds off the edges
>
> On Sat, Oct 17, 2009 at 12:34 PM, Alan McKinnon
> <alan.mckin...@gmail.com>wrote:
>
>> On Saturday 17 October 2009 21:26:41 Kevin O'Gorman wrote:
>> > On Sat, Oct 17, 2009 at 12:18 PM, Alan McKinnon
>> <alan.mckin...@gmail.com>wrote:
>> > > On Saturday 17 October 2009 20:58:00 Kevin O'Gorman wrote:
>> > > > Modifying the monitor section made no noticeable change. There's
>> still
>> > > > a 24-pixel bleed off the right edge to begin with. I can fool with
>> > >
>> > > settings
>> > >
>> > > > to make it bleed left instead, but there's no setting that affects
>> > > > pixel spacing. I like the cleaner monitor section, though.
>> > > >
>> > > > I'm back to thinking about modelines. Any better ideas?
>> > >
>> > > I'd try adjust the frequencies first, then try modelines.
>> > >
>> > > --
>> > > alan dot mckinnon at gmail dot com
>> > >
>> > > I'd try that too if I had a clue how to do it, let alone do it safely.
>> > > Got
>> >
>> > any pointers to FMs?
>>
>> Safe frequency ranges are in the monitor's documentation. Do you have docs
>> for
>> your monitor (I'm using it's a CRT).
>>
>> You can safely reduce either horiz or vert range. As the electronics[1]
>> age,
>> the monitor's ability to correctly sync the start of the picture with the
>> start of the display area deteriorates, especially at the upper bound. If
>> reducing the upper bound of the horiz setting improves matters, that is
>> indicative of this happening.
>>
>> [1] more specifically, electrolytic capacitors. They are temperature-
>> sensitive. Silicon does not "wear out" as such.
>>
>> --
>> alan dot mckinnon at gmail dot com
>>
>> I have docs. They are not very informative.
>
> When I start it up, the left edge is fine, which is the sync edge. Because
> of that and because I can adjust positioning left and right, and because the
> problem arose abruptly with the reboot to a new Xorg, I rate the probability
> of hardware problems low (but not zero of course).
>
> It appears to be a problem of horizontal spacing of the pixels. At it
> stands there is not room for the last 24.
>
> --
> Kevin O'Gorman, PhD
>
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>
> What type of monitor do you have?
>
> How old is it?
>
> What is the screen size?
>
> What exactly do you mean by bleeding edges? Does the gui scroll when you
> move you mouse towards the edges? is that what you mean by bleeding?
>
> Another thing; Do you have the monitor manual? It will tell you the proper
> H and V sync rates at certain resolutions.
>
> Are you sure it supports that resolution?
>
>
> It's as listed in the xorg.conf above: I can be sure because it's
Westinghouse. It's a flat-screen.
It's a couple of years old, I guess. It's new enough to talk to X and
report:
(II) MACH64(0): clock: 121.8 MHz Image Size: 410 x 308 mm
which agrees with my ruler. In inches a little over 16" x 12" visible.
The video card is sending all 1280 dot columns. I have a control on the
monitor called "H position" and I can scroll one pixel at a time to change
which 1256 dot columns I want to see of the 1280 that are sent. The image
does not scroll with mouse movement.
I have the manual. You are way over-optimistic about its contents. I had
no better luck on the web site. The limits I've posted were acquired by X
from the monitor itself.
The monitor did fine until I rebooted yesterday. Its on-screen display
shows it thinks it's doing 1280x1...@60hz.
It's close of course, but not quite there.
--
Kevin O'Gorman, PhD
