Red Hat Bugzilla – Bug 439871
xorg-x11-drv-ati does not support "NoDDC" with ASMI RMM2 from Raritan
Last modified: 2009-01-09 02:45:07 EST
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Description of problem:
I am having trouble with the xorg-drv-ati driver in FC8 (32-bit) using the Raritan RMM2 (Remote Management Module)
Either I get video in the RMM2 Java KVM Console and no video signal on the local console r (using Option "NoDDC") I get video on the local console but, no signal on the KVM Console.
The "NoDDC" resloves display problems for previous Linux releases (such as RH3, RH4, RH5 and even SLES9 and SLES10), but appearantly there are enough significant changes with the xserver in FC8 and FC9 that problems now arise with the ATI chipset driver.
The ATI driver has a problem displaying the same video signal on both the RMM Virtual console device and the local console device at the same time.
This problem has been identified and addressed by Raritan by patching the source for the ATI driver. Which I will attach.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Setup a server with an onboard ASMI connector with an RMM2 from Raritan.
2. Install FC8 or FC9.
3. Add 'Option "NoDDC"' to the Device section of xorg.conf
Toggle in/out this option (restarting xserver, init 3/init 5) to see that you can only get one device to display at a time.
My local console went blank.
I should have seen identical video signals both on my local LCD display device and within the Virtual Java KVM Cosnole of the Raritan RMM2.
The problem exists with the ATI driver, but a solution is provided by Raritan who made a patch to the ATI driver.
Created attachment 299756 [details]
These include a new binary,src,debug rpms for the ATI driver to fix the NoDDC virtual display problem.
I hope someone there responsible for maintaining the video drivers for Fedora
Core releases picks up on this and rolls this fix into subsequent builds ASAP.
you've only attached the binary rpm, which isn't much use to me..
please attach an xorg log file from the F9 driver. and any patches they might
NoDDC should not be necessary and we can try and fix this properly.
Created attachment 300454 [details]
Source RPM for patched ati driver.
Sorry this was not upload previously.
I was using the 'dragdropupload' extension for Firefox and it obviously didn't
I only have this source patch for FC8.
The patch was provided to me by Raritan.
Raritan also confirmed that this problem also occurs on FC9.
But I have not tried to reproduce this on FC9.
We have had to use "NoDDC" previously with RedHat EL3, EL4, and EL5
an also on SLES 9 and 10.
NoDDC was the only way to avoid X from getting confused as to which display
device was the primary, I think.
You see the RMM's virtual display appears to the OS as another DVI device and I
think it tries to keep sepearte resolution settings for the local console and
the virtual DVI of the RMM2.
We were never able to change the local desktop resolution and have it stick
without setting the NoDDC Option before.
But now we can't even do that.
If I am confused. please feel free to straighten me out. All I know is how is
used to "work", but it might not have been working correctly then either.
I have two bugs open with this, as you are aware, because I wanted to make sure
that it got attention for both FC8 and FC9. How should we move forward to
track this at one location?
Thanks for your attention.
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