Configuring FireMV 2400

Alex Deucher alexdeucher at
Fri Jan 29 08:03:58 PST 2010

On Fri, Jan 29, 2010 at 10:28 AM, Bill Conner <bconner at> wrote:
> On Jan 21, 2010, at 7:39 PM, Timothy S. Nelson wrote:
>> On Thu, 21 Jan 2010, Bill Conner wrote:
>>> I've been fighting with get a ATI FireMV 2400 PCIE for several days now and
>>> I've reached a dead end. I was hoping someone has already resolved my issue
>>> or can point me in the right direction.
>>       I have a 2400 MV with only two working heads.  I've been following the
>> issue moderately closely.  However, I'm no expert on xorg in general.
>>> Environment details
>>> Ubuntu 9.10
>>> 2.6.31-18-generic
>>> xorg-server 2:1.6.4-2ubuntu4.1
>>> The 2400 is a quad-head board with two M24 chips appearing on separate PCI
>>> slots. In my case 0:5:0:0(primary) and 0:6:0:0
>>> The server has no issue in auto detect mode with the primary M24 and it's
>>> dual heads perfectly. The problem is getting the server to recognize the
>>> second M24. It sees the card but it fails to load:
>>       The problem is, when xorg was refactored to use/create libpciaccess,
>> no-one was testing for support of multiple graphics chips, and it got broken
>> along the way.  This has now been fixed, but only in version 1.7.  You will
>> need to upgrade to version 1.7 before it will work.
>>       I haven't personally gotten around to installing 1.7 myself.  I plan
>> to do this in May.  I'm on Fedora 11, and I'd have to upgrade to Fedora 12 (or
>> go through a lot of hassles recompiling half the stuff on my system).  I'm
>> waiting for F13.  A quick skim of ubuntu-related information reveals that
>> you're on Karmic, which is the latest release.  I was unable to determine what
>> version of xorg is going to be used in Lucid.  That's the advantage of Fedora;
>> it's already had an xorg 1.7-using version out for months.  It seems to me
>> your options are:
>> 1.    Stick with what you have as dual-head
>> 2.    Recompile xorg yourself, which I regard as a vast undertaking (but I'm
>>       no xorg expert)
>> 3.    Start using Fedora, the most up-to-date distro around ;)
>>       Of course, I could've missed another option there.
>>       Note, also, that I don't promise that xorg 1.7 will work, but I do
>> know that if you ask questions here, the experts will say "upgrade to 1.7".
>>       HTH,
>    Thanks for the info. You're right the newer versions of xorg have the multihead support fixed (sort of).
> I installed Ubuntu 10 alpha 2. Only two screens came up on auto configure but Xorg -configure generated a working xorg.conf with both chips.
> Now a new issue has appeared. The two heads on the primary interface flash periodically. I remember reading another post somewhere about this issue.

Might be underflow to the display controller.  Does:
Option "DisplayPriority" "HIGH"
in the device section(s) of your config help?


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