Bug 146751 - Can't set different resolution on internal and external screen
Summary: Can't set different resolution on internal and external screen
Alias: None
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: XFree86   
(Show other bugs)
Version: 3.0
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: X/OpenGL Maintenance List
QA Contact: David Lawrence
Depends On:
TreeView+ depends on / blocked
Reported: 2005-02-01 10:08 UTC by David Juran
Modified: 2007-11-30 22:07 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-03-07 20:28:20 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
XF86Config (3.77 KB, text/plain)
2005-02-01 10:11 UTC, David Juran
no flags Details

Description David Juran 2005-02-01 10:08:42 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4.3)
Gecko/20050104 Red Hat/1.4.3-3.0.7

Description of problem:
I have a laptop Dell D600 which has a 1400x1050 LCD display. Now this
display _needs_ to have the reslution set to 1400x1050, if I try to
alter it with CTRL-ALT-+ or xrandr the displat goes black. Now this
isn't a major problem until I connect the laptop to a projector. Since
the projector can't handle resolutions higher then 1280x1024
(otherwise it goes black and complains about beeing out of sync) I end
up with having to use _either_ the built in LCD panel or the projector.
To remedy this I tried to set up different resolutions on the external
and internal port, but with little success. My Xfree86Conf is attached.
The graphics adapter in the laptop is a 

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 Lf
[FireGL 9000] (rev 02)

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Attach a projector that can't handle 1400x1050 resolution.
2. Note how you can't see the image on both the projector and LCD

Additional info:

Comment 1 David Juran 2005-02-01 10:11:14 UTC
Created attachment 110493 [details]

Comment 8 Mike A. Harris 2005-03-07 20:24:21 UTC
I've reviewed this bug report and done some preliminary investigation
which seems to indicate that this problem appears to be a
configuration issue rather than a bug in the X server or video

In order to configure the server to do what you want, you will need
to edit the X server config file by hand and change some options,
which are describe on the "radeon" driver manpage.  You may need
to experiment with different options until you find a setup that
meets your specific requirements.

If you require assistance configuring the server, please contact
Red Hat Global Support Services directly at 1-888-RED-HAT1 for
technical support, and mention this bug report to the
support representative.

Comment 9 Mike A. Harris 2005-03-07 20:28:20 UTC
Setting status to "NOTABUG" as per above assessment.

Comment 10 David Juran 2005-04-01 12:54:37 UTC
In deed it was an configuration issue.
Adding the line
Option "CloneMode" "1280x1024"
to the "device" section of /etc/X11/XF86Config solved the problem

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