Red Hat Bugzilla – Bug 446726
Monitor driven at unusable settings by Matrox G450
Last modified: 2010-02-27 20:16:34 EST
Description of problem:
When starting X or running system-config-display, I get a black screen with a message from my
monitor stating that an attempt is being made to run it at an unusable refresh rate.
The video card is a Matrox G450 low-profile. This card has a DVI connector on the bracket and
includes a special adapter cable that splits the DVI connection into two VGA connectors. The monitor,
an NEC 2470WNX, is attached to one of the VGA connectors.
Version-Release number of selected component (if applicable):
I've tried moving xorg.conf out of the way; that didn't change anything.
If I run system-config-display with "--set-vsync=60 --forceui", I do
successfully get the UI. However, it seems system-config-display doesn't put
anything in xorg.conf to reflect the vsync=60 setting. As a result, X still
isn't usable when it runs.
If I plug the monitor directly into the DVI port, system-config-display will run successfully without any
arguments. However, it comes up at 800x600 and reports the monitor as unknown; 800x600 and
640x480 are the only available pixel dimensions.
In spite of this, X still tries to run the monitor at an unusable refresh rate and I get the same black screen
with the error message from the monitor.
Thanks for the bug report. We have reviewed the information you have provided
above, and there is some additional information we require that will be helpful
in our diagnosis of this issue.
Please attach your X server config file (/etc/X11/xorg.conf) and X server log
file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file
attachments using the bugzilla file attachment link below.
Could you please also try to run without any /etc/X11/xorg.conf whatsoever and
let X11 autodetect your display and video card? Attach to this bug
/var/log/Xorg.0.log from this attempt as well, please.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
Created attachment 307302 [details]
Created attachment 307303 [details]
Log from session with the monitor connected directly to the DVI port
conf & log attached.
I have also observed similar behavior when connecting the card to an NEC
MultiSync FP950, an analog CRT monitor.
Behavior when running with no xorg.conf is already described above.
Pardon my naivete, but why do you think this has something to do with the mouse driver?
Setting component to xorg-x11-drv-mga; assuming setting to xorg-x11-drv-mouse
was an error.
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Still a problem in Fedora 11.
Since this bugzilla report was filed, there have been several major updates in various components of the Xorg system, which may have resolved this issue. Users who have experienced this problem are encouraged to upgrade their system to the latest version of their packages. For packages from updates-testing repository you can use command
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Please, if you experience this problem on the up-to-date system, let us now in the comment for this bug, or whether the upgraded system works for you.
If you won't be able to reply in one month, I will have to close this bug as INSUFFICIENT_DATA. Thank you.
[This is a bulk message for all open Fedora Rawhide Xorg-related bugs. I'm adding myself to the CC list for each bug, so I'll see any comments you make after this and do my best to make sure every issue gets proper attention.]
*** Bug 479601 has been marked as a duplicate of this bug. ***
*** Bug 472773 has been marked as a duplicate of this bug. ***
Could you please reply to the previous question? If you won't reply in one month, I will have to close this bug as INSUFFICIENT_DATA. Thank you.
[Note please, that this is machine generated comment for large amount of bugs; due to some technical issues, it is possible we've missed some of the responses -- it is happens, please, just a make a comment about that; that we will see. Thank you]
Reporter, could you please reply to the previous question? If you won't reply in one month, I will have to close this bug as INSUFFICIENT_DATA. Thank you.
[Notice, that this is an automatically filed comment for all bugs with hanging NEEDINFO for longer time; it is possible by quirks of bugzilla, that some bugs are in this state even though you have attached the required information; please, make a comment to this bug ... that we should see correctly; I am sorry for the bothering you in such case.]
This appears to have been fixed.