Red Hat Bugzilla – Bug 187674
Graphical installer failure for LG1710B monitor because of invalid screen mode
Last modified: 2007-11-30 17:11:29 EST
Description of problem:
A fresh install of FC6/rawhide is performed on an IBM ThinkPad
T23. The lid is closed, and an LG1710B 17" TFT monitor is
connected to the computer by means a docking station (VGA
output). When the installer switches from text to graphical
mode, the monitor remains blank and goes to power save mode
after a short period of time ("resolution=800x600" was added
as boot argument!).
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Start installer from "boot.iso" CD.
2. Enter basic information in text mode, including the
screen mode ("resolution=800x600").
The monitor turns blank.
The Fedora graphical installer should have appeared on
It is still possible to switch to a text console. It is also
possible to obtain a working graphical installer by switching
off the monitor and opening the lid before switching on the
notebook. The "XConfig.test" shows that the first screen mode
has a resolution well beyond the capabilities of the monitor
which prevents it from synching with the VGA signal. The actual
resolution is "1920x1200"!!!
Created attachment 127205 [details]
"xorg.conf" file created by "anaconda/pyxf86config"
This used to work for previous releases of "Fedora Core" including
"FC5" and early "FC6/rawhide".
Works again for rawhide as of 2006-05-05.