Xorg 7.4 breaks mga with G450

[Warren Block]

On Mon, 26 Jan 2009, Robert Noland wrote:

> On Mon, 2009-01-26 at 10:04 -0700, Warren Block wrote:
>> On Sun, 25 Jan 2009, Robert Noland wrote:
>>
>>> On Sun, 2009-01-25 at 22:50 +0000, Mark Knight wrote:
>>>> Hi,
>>>>
>>>> I've been using the same PC with a Matrox G450 on AGP with a trusty old
>>>> iiyama CRT monitor (Vision Master pro 410) for years.  System is running
>>>> FreeBSD 6.4-RELEASE-p1
>>>>
>>>> Having just upgraded to Xorg 7.4 from 7.3 and following the instructions
>>>> in UPDATING I cannot get a stable picture.
>>>>
>>>> Using my stock xorg.conf (see below), or a brand new config version
>>>> created by "Xorg -configure" I get an extremely noisy (but stable) image
>>>> if I lower resultion from my normal 1280x1024 to 1027x768.  At the
>>>> standard resolution the monitor is unable to sync.
>>>>
>>>>    http://www.knigma.org.uk/scratch/Xorg.0.log
>>>>    http://www.knigma.org.uk/scratch/xorg.conf
>>>>
>>>> I've tried with and without DDC and with and without
>>>> HorizSync/VertRefresh and with and without SyncOnGreen (my monitor has
>>>> always product a slightly sharper picture with the latter).
>>>>
>>>> Any ideas?
>>>
>>> I think your on the right track... It sounds like the mode calculation
>>> is off...  I won't have access to mga hardware before next weekend, but
>>> even then mine is connected to a panel.
>>
>> My G450 does the same (sync problem/noisy picture) on an LCD.
>> mga-1.4.9 does it too, so I'd suspect a change in xorg-server.
>
> I just discovered an issue... Can you forcibly rebuild the 1.4.9 driver
> against the new server and see if that works?

Not being sure what you mean by "forcibly".  I have a copy of mga-1.4.9 
and mga-1.9.100 in /usr/ports/x11-drivers in addition to the current mga 
(1.9.100).  I've been deinstalling (and cleaning) one before 
installing the other.

-Warren Block * Rapid City, South Dakota USA