Bug 2601

Summary:	Matrox G550 gets too low vertical frequencies.
Product:	xorg	Reporter:	Bernhard R. Link <ihatebugzilla>
Component:	Driver/mga	Assignee:	Xorg Project Team <xorg-team>
Status:	RESOLVED DUPLICATE	QA Contact:
Severity:	normal
Priority:	high
Version:	6.8.2
Hardware:	Other
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Bernhard R. Link 2005-02-23 09:23:11 UTC

The Matrox G550 card in use here have a VGA output on head 1 and a DVI
output on head 2. (At least I guess those are 1 and 2). When booted with
only a device attached to the DVI output, it seems to switch to this
at boot time and all console output is at the DVI-out.
In this situation the mga driver (without HALlib) generates too low
vertical refresh rates. (The driver says it uses 60Hz, but the TFTs
either say out of range or the better model show something about 29 Hz)
Adding another output device to the VGA output also shows wrong frequencies
then.

Comment 1 Adam Jackson 2005-12-22 03:34:55 UTC


*** This bug has been marked as a duplicate of 4249 ***

Comment 2 Tilman Sauerbeck 2006-11-19 13:36:53 UTC

I believe I'm seeing the same problem on a G550 dual dvi (the card has one DVI
connector, but with that dual dvi cable you can connect two DFPs).

When I start X, the monitor says the frequencies are out of range. Not sure how
to test what frequency the driver is trying to use. Switching off the monitor
and switching it on again "fixes" the problem. Not sure whether that means I'm
slowly frying my monitor that way though.

The patch from #4249 does not help here.

Comment 3 Tilman Sauerbeck 2006-12-16 09:43:20 UTC

Disregard my comment above, it has nothing to do with Bernhard's problem.


*** This bug has been marked as a duplicate of 4249 ***

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