Subject: HELP: Probs configuring X

From: Justin Stodola <[email-masked]>
Date: Mon, 16 Sep 1996 12:06:55 -0400

Ok, X works ok, with one annoying problem:  Down the left hand
side of the screen is a fairly narrow(~.25 inch) band of increased
intensity that makes anything that fall within it unreadable. This
occurs in all video modes with resolutions higher than 640x480.

My hardware:
STB Powergraph 64 Video(S3 Trio64V+ Chipset)
MAG DX17F Monitor(30-64kHz Horizontal, 50-100Hz Vertical)

I am using the xserver-s3, and configured for the S3 Trio64 chipset.

Anyone have any suggestions?

Justin Stodola
Senior-Physics Dept. U of Ky
[email-masked]
[email-masked]

---

From: Paul Christenson <[email-masked]>
Date: Mon, 16 Sep 1996 12:31:15 -0700

> Anyone have any suggestions?

Most likely, that bright band is caused by retrace, which is from the
electron beam coming on too soon.  A few minor adjustments in the
XF86Config file will take care of that.

There's a good document on making these adjustments.  On a Slackware
system, it's /var/X11R6/lib/doc/VideoModes.doc; don't know where it
hides on a Debian system.

-- 
+---------------------------------------------------+
| Technical Support Engineer, Cyclades Corporation  |
| 800/88-CYCLADES (882-9252) or (510)770-9727, x258 |
| Maker of High Performance Multiport Serial Cards  |
+---------------------------------------------------+

---

From: [email-masked] (Christian Linhart)
Date: 16 Sep 1996 23:23:43 +0200

Justin Stodola ([email-masked]) wrote:
: Ok, X works ok, with one annoying problem:  Down the left hand
: side of the screen is a fairly narrow(~.25 inch) band of increased
: intensity that makes anything that fall within it unreadable. This
: occurs in all video modes with resolutions higher than 640x480.

[description of Monitor and graphics card deleted]

: Anyone have any suggestions?
Yes. The blank signal after the horizontal sync may be to short for
your monitor. 
You have to edit the file /etc/X11/XF86Config.
Increase the fifth number of the modeline by about 32. 
(You can experiment which value yields the best result.)
An example:
Assume the modeline in question looks like this:
Modeline "800x600"     70     800  876  1020 1164   600  600  618  625 +hsync +vsync
then increase this number ------------------>^^^^

Alternatively it may be sufficient to shift the image to the right by using
the control elements of your monitor.

Hope this helps,
Chris
-- 
Christian Linhart <[email-masked], [email-masked]>
Software Development * Internetworking * Linux&GNU Support
snail-mail: Wagingerstra_e 12/6, A-5020 Salzburg, AUSTRIA/EUROPE

---

From: Erik B Andersen <[email-masked]>
Date: Mon, 16 Sep 1996 18:03:43 -0600

Run the program xvidtune, tune your monitor to look like you want it to,
and then push the "Show" button.  Copy the output from xvidtune to the
/etc/X11/XF86Config to replace the current settings for the adjusted
video modes.
 -Erik
-- 
Erik B. Andersen         Web:    http://www.et.byu.edu/~andersee/ 
2485 South State St.     email:  [email-masked]
Springville, Ut 84663    phone:  (801) 489-1231
--This message was written using 73% post-consumer electrons--

---

From: Gerry Jensen <[email-masked]>
Date: Mon, 16 Sep 1996 18:28:06 -0600 (MDT)

> hides on a Debian system.

/usr/X11R6/lib/X11/doc/html/VideoModes.html

Gerry

---

From: Gerry Jensen <[email-masked]>
Date: Mon, 16 Sep 1996 21:57:45 -0600 (MDT)

> then increase this number ------------------>^^^^

The program "xvidtune" may be of benefit here to help you tweek these
values.

Gerry