Red Hat Bugzilla – Bug 124124
Flickering - Random horizontal white lines
Last modified: 2007-11-30 17:10:43 EST
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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040510
Description of problem:
Video Harware: NV17 (GeForce4 MX 440)
Driver Installed: NVIDIA GeForce 4 (generic)
As best I can explain you can see the retrace lines as the screen
refreshes itself. you see a white dash then nothing as it makes its
way from top to botton of the screen.
This problem was introduced in Fedora Core 2. Core 1 was not a
problem. I've also encountered this problem running Red Hat
Enterprise WS on the same machine.
When I try to install Nvidia driver for 3D support the screen will
never come up.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Get the appropriated video card and fire up the system no
configuring need be done.
Actual Results: Flickering
Expected Results: nothing
Created attachment 100488 [details]
X configuration file
I'm also experiencing the same problem with the same model card ( A
ChainTech GeForce 4 MX440 ). The problem only occurs in 24 bit mode
though - if I change my xorg.conf to 16 bit mode the problem goes away.
The machine is an Athlon 2000 XP, with a VIA KT333 motherboard.
I've attached my config file, dmesg output and Xorg.log for both 16
bit and 24 bit modes (the diff shows little difference though).
Created attachment 100612 [details]
X log for 16 bit mode (no horizontal white lines / corruption)
Created attachment 100613 [details]
X log file for 24 bit mode (many white lines / corruption)
Created attachment 100614 [details]
Confirmed: 16bit is fine 24bit flickering
Since this bugzilla report was filed, there have been several major
updates to the X Window System, which may resolve this issue. Users
who have experienced this problem are encouraged to upgrade to the
latest version of Fedora Core, which can be obtained from:
If this issue turns out to still be reproduceable in the latest
version of Fedora Core, please file a bug report in the X.Org
bugzilla located at http://bugs.freedesktop.org in the "xorg"
Once you've filed your bug report to X.Org, if you paste the new
bug URL here, Red Hat will continue to track the issue in the
centralized X.Org bug tracker, and will review any bug fixes that
become available for consideration in future updates.