[ltp] Display issues - 760XL

[Victor Wagner]

On Fri, 26 Oct 2001, Jim Redmond wrote:

> Hi.  New to this list, new to Linux installation/administration.
>
> I've installed Debian (potato) on my Thinkpad 760XL without too much
> difficulty - made the Rescue and Root floppies, inserted the CD, etc.
> However, when I start GNOME, I'm having bizarre display issues -
>
> *At default resolution, the desktop runs off the edge of the screen.

vi /etc/X11/XF86Config

On my 760ED (1024x768 matrix) following modeline
works without any problem:

Modeline  "1024x768" 70.00 1024 1076 1212 1332 768 771 777 806 -hsync
-vsync

If XL model has 800x600 screen, you'll need another modeline,
Unfortunately, guy who owns 760C is not in office now and I cannot
cite his modeline. But VESA standard modeline should work.



> When I move the cursor to the edge of the visible part of the desktop,
> the display scrolls so I can access whatever's over there.  Also, the
> display seems to be tiled - whatever's at the top of the screen is
> duplicated at the very bottom.


Start xvidtune and try to adjust parameters interactively. (run it from
xterm, so when you press Show button, modeline would be visible on screen)
Open /etc/X11/XF86Config in nearby window and copy modeline, printed
by xvidtune there.

Make sure that there are no other modelines in your XF86Config,
especially modelines with same name. String "1024x768" in quotes is
modeline name, which doesn't need to be "XxY" - I often use "XxY@Hz",
and you even can write "my beloved mode". Just make sure that
same string is specified in the Modes line in Screen section.


> *When I adjust the resolution, using Ctrl-Alt-keypad plus, I can make it
> display the whole desktop; however, it appears fuzzy, as if it's unable
> to synchronize vertically.  On a standard desktop monitor I'd tweak the
> vertical size and/or position, but if I have such options on the 760XL
> I'm unaware of them.

xvidtune is your friend.

> *If I use Ctrl-Alt-keypad plus one more time, I get a painful flickering
> black-and-white screen.  That setting hurts so much that I never stop
> there but continue on to one of the other flawed settings.
>
> As I mentioned, I'm no expert, but I suspect X-Windows is having issues
> with my hardware - I can replicate this in IceWM, twm, and WindowMaker.

X-Window just have issues with improperly written configuration.
I've never experienced problem with any thinkpad I was able to lay
my hands on.


> However, I can't be sure, since I'm still unfamiliar with XFree86
> configurations.
>
> Any suggestions?

Install pacaage doc-linux-text and read
/usr/share/doc/HOWTO/en-txt/XFree86-Video-Timings-HOWTO.txt.gz


-- 
Victor Wagner			vitus@ice.ru
Chief Technical Officer		Office:7-(095)-748-53-88
Communiware.Net 		Home: 7-(095)-135-46-61
http://www.communiware.net      http://www.ice.ru/~vitus


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