VGA o/p connected to a widescreen corrupts original display

VGA o/p connected to a widescreen corrupts original display

Post by Geico Cave » Thu, 16 Aug 2007 08:17:17

My laptop has a 15.4" widescreen display.

I am trying to set it up for a presentation, so I connected my 19"
widescreen display to the VGA output. Tried i810switch. Does not work
(i810switch crt on returns "PCI id of i810 is not recognized.") - my
graphic card :

00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS/940GML
Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/940GML
Express Integrated Graphics Controller (rev 03)

is apparently not supported.

The ACPI hotkey (Fn+F8) - this is a Dell D820, does nothing.

The only way to get the external display (in this case, the 19" widescreen
display) to work is to use ctrl+alt+backspace to restart X. That shows the
display beautifully on the 19" widescreen display, but I get only the
topleft part (about 70-80%) of the display on the laptop when the external
monitor is connected.

My guess is that the X server is trying to setup the same resolution and
screen size on both the laptop and the external monitor and I end up
getting only 80% of the display to show up on the laptop.

For obvious reasons, this state of affairs is unacceptable.

Is there a way to have the laptop display be independent of no matter what
is connected / not connected externally, and yet have X properly detect the
external monitor/projector's resolution (the way it is apparently doing) ?

While restarting X is not a very big issue right now, I would also like to
set up the ACPI hotkey so that that works as well.

Relevant portion of my /etc/X11/xorg.conf :

Section "Device"
Identifier "Intel Corporation Mobile 945GM/GMS/940GML Express
Integrated Graphics Controller"
Driver "i810"
#Option "MonitorLayout" "CRT,LFP"
#Option "Clone" "true"
#Option "DevicePresence" "true"
BusID "PCI:0:2:0"

(Yes - those lines are commented out - I put them in during my experiments).

X version (its apparently using the new numbering scheme)
from /var/log/Xorg.0.log :

X Window System Version 1.3.0
Release Date: 19 April 2007
X Protocol Version 11, Revision 0, Release 1.3
Build Operating System: Linux Debian

1. Auction: *Nice Vintage* IBM PS/2 Color Display VGA Monitor 8513

2. What's the correllation between File I/O's and Disk I/O's

We have a client that is getting poor response times.
But it's not consistant. One person may have no problems one day while
another is having huge delays, and the next day it's vice versa.
The system we have does a lot of data entry. Depending on the data
entered, a validation against files is required.
We've done a lot of investigation into this, and one thing that we
have noticed is that the number of Disk I/O's increases much faster
than the File I/O's requested.

One thing noticed was they had 9 disks, and disk 1 was going to 70-80%
utilisation (WRKDSKSTS), which in turn caused the other 8 disks to
increase in utilisation.

The iSeries is not reporting damaged objects, files or access paths.

File I/O's Disk I/O's
Action 1: 155 127
Action 2: 230 478
Action 3: 285 400
Action 4: 340 377
Action 5: 420 1220
Action 6: 480 2720

Looking at the above example Actions 1-4 look OK to us (afte review
the program source for Read/Writes and updates). But Actions 5 & 6
have much more Disk I/O than we'd expect.
Should there be some sort of correllation between File I/O's and Disk
What governs Disk I/O is it the OS?
Is there some configuration changes we might be able to make to help
alleviate the problem?


3. Auction:IBM PS/2 8513 Color Display Monitor VGA HD-15 13"

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