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Old 11-09-2004, 07:05 PM   #1
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Registered: Nov 2004
Location: Boston,MA
Distribution: Fedora Core 2
Posts: 1

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Unhappy Video Card RAMDAC IBM 525 not supported Fedora Core 2

I've sucessfully loaded and booted Fedora Core 2 (2.6.5-1.358).
X11R6.7.0 fails to start (aborts) apparently due to the following problem:
(from /var/log/Xorg.0.log)
Load Module: "ramdac"
Loading /usr/X11R6/lib/modules/libramdac.a
Compiled for 6.7.0, module version 0.1.0
ABI class: Video Driver version 0.7
s3(0): Attached RAMDAC is IBM 525
s3(0):This RAMDAC is not supported by this Driver, aborting.
s3(0):RAMDAC Probe Failed.
(||) Unload Module: "s3"
I am using a Diamond Stealth 64 w/VRAM - PCI Video card.
It appears to be configured and recognized in my /etc/X11/xorg.conf
DISPLAY Adaptor: S3 VIsion 968 64 w/2MB
S3 Compatible.
Driver:S3 legacy.sys
Version: 5.00.2184.1

I have seen complaints of this in other forums Redhat 8 where they are using the Xfree86 X windowing environment, but no one responded to the query.

Is this just an unsupported RAMDAC with the only solution being a new video card. If so which video cards can I be sure will be supported with the X11 environment?

Also, the "Long Standing black/blue screen problem" (e.g. command line text becomes blue only) which was supposed to be addressed in this release, seems to be haunting my installation.
Old 05-05-2005, 12:35 AM   #2
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Registered: May 2005
Location: singapore
Posts: 6

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Lightbulb Linux XFree 4.2.0 S3 968 IBM ramdac not supported


i'm not sure if this helps.

I've been plagued by a problem that the s3 driver do not support various ibm ramdacs. This is made known by the authors.

Chances are that you are facing a similar problem.

I've posted a kludge/hack which appears to enable me to start X windows
with the S3 driver on my diamond stealth 64 video card which uses a S3 968 video chip and a IBM 526 ramdac.

The kludge/hack/patch is on my web site at:

note that is is experimental, & i'm not warrantying it.

anyways, hope this helps,

Last edited by andrewgoh; 05-05-2005 at 12:49 AM.


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