Red Hat Bugzilla – Bug 163312
Resolution of external video from laptop fixed at 800x600
Last modified: 2007-11-30 17:11:10 EST
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Description of problem:
I need to use my laptop with external data projection facilities. Under an old RedHat system with XFree86, I had no trouble, even if the screen resolution was 1600x1200. With FC2 and FC4, the resolution I am using on the local screen is 1280x1024. Only an 800x600 piece of the area gets projected through the video connection.
I have tried this in 3 venues. With a small portable data projector, I have no problem; the full 1280x1024 is projected. In the other venues (large halls with fixed facilities), I only get the 800x600 displayed.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Connect and turn on the data projector.
2. Boot the computer
Actual Results: 800x600 portion of the screen display is projected. If I move the mouse, the displayed area always tracks the cursor.
Expected Results: The projected screen should match the screen on the local laptop.
The laptop I am using is an IBM ThinkPad.
I have installed XFree86 to try to replicate the success I had under the old
RedHat system, and the latest version exhibits the same problem as xorg.
I have experimented with various possibilities and have come up with a setting
which solves the problem. Hand editing the XF86Config file so that it has the
following lines gives the desired higher resolution output.
# Driver "ati"
Option "MonitorLayout" "LVDS, SVGA"
VendorName "ATI Technologies Inc"
BoardName "Radeon RV200 LX [Mobility FireGL 7800 M7]"
I have not reverted to xorg to verify that the same solution will work there, as
I now have a production system that I can use tomorrow when I need it.
Thanks for the bug report. This particular bug has already been reported
into our bug tracking system, but please feel free to report any further
bugs you find.
*** This bug has been marked as a duplicate of 162733 ***