Matrox G450 Dual Head - Driver installation problem

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Re: Matrox G450 Dual Head - Driver installation problem

Postby mcs » Tue Mar 25, 2008 12:20 am

Well, I used your configuartion file and it decreased the noise a little bit but it wasn't gone completely. Then I used AGP 4 options and noise got worse !! Now, I removed those optional lines from xorg.conf (going back to configuartion you provided) but apparently the process was irreversible and noise level is not as low as the first time I used your configuration .... I assume it might change after a few reboots.

I have attached the log files for AGP 4 and last AGP 1 cases.
Attachments
Xorg.0AGP4.log
AGP 4
(44.52 KiB) Downloaded 231 times
Xorg.0AGP1.log
AGP 1
(44.45 KiB) Downloaded 237 times
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Re: Matrox G450 Dual Head - Driver installation problem

Postby tuxx-home.at » Tue Mar 25, 2008 8:55 am

I can see in your logfiles that although the preferred timing values are used, your displays initialize at 1280x1024@60Hz whereas the DDC gathered modelines refer to a supported resolution of 1280x1024@75Hz (should be more flicker-free).
Let's see if we can convince it to use this modeline.

According to your logfile, a DDC gathered modeline for 1280x1024@75Hz has been found, which is:

Code: Select all
Modeline "1280x1024"  135.00  1280 1296 1440 1688  1024 1025 1028 1066 +hsync +vsync


I modified your configuration file to use this modeline, please give it a try.

I can't see anything related to your experiences with the AGPMode option in your logfiles but I assume that either your video card's BIOS is outdated/broken or the card itself is about to die.
To be sure you could try to update your MGA card's BIOS with the floppy disk provided in the following HOWTO:
[http://forum.tuxx-home.at/viewtopic.php?f=4&t=27]
Attachments
xorg.conf
The same as before, but with a custom modeline for 1280x1024@75Hz
(2.93 KiB) Downloaded 226 times
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Re: Matrox G450 Dual Head - Driver installation problem

Postby mcs » Thu Apr 03, 2008 1:40 am

Hi, I tried the new configuration file and it made both screens noisy (less noise on primary and more on secondary...) However, after a while (don't know maybe about 1 hr) it is much better now and I hope it is not my eyes that got used to it !lol

about the BIOS, I am not sure if I can find a floppy disk around ... is there any other way to do this by using a flash memory or something else ?


Thanks a lot
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Re: Matrox G450 Dual Head - Driver installation problem

Postby tuxx-home.at » Thu Apr 03, 2008 8:31 am

Hi, I tried the new configuration file and it made both screens noisy (less noise on primary and more on secondary...)


Have you already checked your monitor's OSD to see what resolution and frequencies it is really running on?
Nearly all monitors should support displaying the current resolution and refresh rates to check against your Xorg configuration file.

about the BIOS, I am not sure if I can find a floppy disk around ... is there any other way to do this by using a flash memory or something else ?


Of course.
You could burn the floppy image onto a CD (using floppy disk emulation boot, I know of Ahead Nero Burning Rom that supports this) or if your system's BIOS supports booting from USB sticks with floppy emulation, you can also directly transfer this image to your USB stick (make sure to back up all data before doing this as it will destroy the partition table and all the data on your USB stick).
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Re: Matrox G450 Dual Head - Driver installation problem

Postby mcs » Fri Apr 04, 2008 2:59 am

Hi, Yes I've checked the OSD and both says 1280*1024 @ 63KHz H & 59 Hz V. My monitors are both Princeton VL1919 which should support 75Hz as well. In the Screen preferences window I have to choose Generic LCD Panel 1280*1024 which only has 60Hz option because other wise (although I have 75 & 60Hz) the main screen view is somehow enlarged and doesn't fit in the monitor !!! For LCD Panel 1280*1024.

Another news is that I found a new graphic card with 32MB of video RAM instead of 16MB and thought maybe this helps a little bit. The noise level is low now and I can call it reasonable. However, I haven't done the BIOS check yet.. but I will let you know the result as soon as I do it. I thing the huge part of the problem comes from the screen since if I play with the phase on OSD, texts changes from clear to blurred and vice versa ! And also text has a little bit of shadow at some points of screen which gets annoying.

I have attached the Xorg conf and log file. The conf file is same as the very last one you sent.

Thanks
Attachments
xorg.conf
(2.93 KiB) Downloaded 247 times
Xorg.0.log
(44.49 KiB) Downloaded 249 times
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Re: Matrox G450 Dual Head - Driver installation problem

Postby tuxx-home.at » Sun Apr 13, 2008 12:04 pm

Yes I've checked the OSD and both says 1280*1024 @ 63KHz H & 59 Hz V.


That's weird, because according to your Xorg logfile, the timing values should be different:

Code: Select all
(**) MGA(1): *Mode "1280x1024@75": 135.0 MHz, 80.0 kHz, 75.0 Hz
(II) MGA(1): Modeline "1280x1024@75"  135.00  1280 1296 1440 1688  1024 1025 1028 1066 +hsync +vsync


In the Screen preferences window I have to choose Generic LCD Panel 1280*1024 which only has 60Hz option because other wise (although I have 75 & 60Hz) the main screen view is somehow enlarged and doesn't fit in the monitor !!!


Please don't use any graphical configuration tools to configure your Matrox graphics card on your Linux systems. I don't know of any such GUI-tool that works in this combination.

I found a new graphic card with 32MB of video RAM instead of 16MB and thought maybe this helps a little bit. The noise level is low now and I can call it reasonable.


That's great. If possible, stick with this card.

I don't know what to suggest you now, because everything seems correct in your configuration but you still have problems, so maybe a BIOS update will help you out, but I don't know for sure (maybe even the OSD lies about the current configuration, but that's very unlikely).
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