F13: nouveau driver seems to swap video streams on NVIDIA NVS-290.
 

I suspect the nouveau driver is swapping or mislabeling the two video
streams that the NVS-290 card generates. Here are my clues:

Setup
- Fedora-13 and nouveau driver (latest yum updates as of midnight)
- NVIDIA NVS-290 video card
- nouveau exposes 2 outputs to XRandR (DVI-I-1 and DVI-I-2)
- The NVS-290 video card has a DMS-59 connector, with a
short DMS-59 to Dual VGA cable with VGA connectors
labeled 1 and 2.
- VGA connectors #1 and #2 are connected to monitors #1(Left)
and #2(Right).

Behavior
1) At boot time, before the nouveau driver is involved, the boot text is
output on the VGA connector labeled "1", which is connected to
monitor
#1 (on my left).
2) At GDM login time, monitor #1 is clearly assigned to the right of the
Virtual screen (its right edge is "impenetrable") while monitor #2 is
on the left side. Weird, but in theory just an odd default. But
wait.
3) Inspecting the "xrandr" output, it is clear that pixels on the
virtual
screen that are directed to "DVI-I-1" are going to monitor #2 and
vice versa (DVI-I-2 goes to monitor #1). I checked the default
situation, then flipped the two halves of the virtual screen back
and forth with xrandr, checking the xrandr status each time.
4) The last bit of weirdness is that the xrandr geometry setting
commands
seemed reversed from what would be expected. Maybe that is the
inevitable result of mislabeling the data stream, or perhaps it is an
important clue in its own right. My head hurts at the point.

Misc
5) Oh yes, I buzzed out the cable, just in case it was mis-wired or
mis-labled. It's fine, that is DMS59:VGA2_RED -> VGA#2:RED, etc.


Please advise if this should be posted somewhere else.

Regards
-- Charlie
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F13: nouveau driver seems to swap video streams on NVIDIA NVS-290.
 

On Wed, 2010-06-09 at 18:31 -0400, Charles Butterfield wrote:

> Please advise if this should be posted somewhere else.

Bugzilla! With Xorg.0.log and xrandr output and
possibly /var/log/messages . Against xorg-x11-drv-nouveau .
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IRC: adamw | Fedora Talk: adamwill AT fedoraproject DOT org
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F13: nouveau driver seems to swap video streams on NVIDIA NVS-290.
 

Will do!

Regards
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F13: nouveau driver seems to swap video streams on NVIDIA NVS-290.
 

On Thursday, June 10, 2010 00:31:20 Charles Butterfield wrote:
> I suspect the nouveau driver is swapping or mislabeling the two video
> streams that the NVS-290 card generates. Here are my clues:
>
> Setup
> - Fedora-13 and nouveau driver (latest yum updates as of midnight)
> - NVIDIA NVS-290 video card
> - nouveau exposes 2 outputs to XRandR (DVI-I-1 and DVI-I-2)
> - The NVS-290 video card has a DMS-59 connector, with a
> short DMS-59 to Dual VGA cable with VGA connectors
> labeled 1 and 2.
> - VGA connectors #1 and #2 are connected to monitors #1(Left)
> and #2(Right).
>
> Behavior
> 1) At boot time, before the nouveau driver is involved, the boot text is
> output on the VGA connector labeled "1", which is connected to
> monitor
> #1 (on my left).
> 2) At GDM login time, monitor #1 is clearly assigned to the right of the
> Virtual screen (its right edge is "impenetrable") while monitor #2 is
> on the left side. Weird, but in theory just an odd default. But
> wait.
> 3) Inspecting the "xrandr" output, it is clear that pixels on the
> virtual
> screen that are directed to "DVI-I-1" are going to monitor #2 and
> vice versa (DVI-I-2 goes to monitor #1). I checked the default
> situation, then flipped the two halves of the virtual screen back
> and forth with xrandr, checking the xrandr status each time.
> 4) The last bit of weirdness is that the xrandr geometry setting
> commands
> seemed reversed from what would be expected. Maybe that is the
> inevitable result of mislabeling the data stream, or perhaps it is an
> important clue in its own right. My head hurts at the point.
>
> Misc
> 5) Oh yes, I buzzed out the cable, just in case it was mis-wired or
> mis-labled. It's fine, that is DMS59:VGA2_RED -> VGA#2:RED, etc.
>
>
> Please advise if this should be posted somewhere else.

I guess you've hit the same bug as me, I even have the same video card.

Bug was reported here: https://bugzilla.redhat.com/show_bug.cgi?id=582582

but it was closed as notabug

Michal
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F13: nouveau driver seems to swap video streams on NVIDIA NVS-290.
 

> I guess you've hit the same bug as me, I even have the same video
> card.
> ...
> Michal

Michal: Seems pretty similar to me too. In any event, per the prior
suggestion, I filed the following bug report:

https://bugzilla.redhat.com/show_bug.cgi?id=602492

Seems like we have gotten past the initial confusion with monitor
position as opposed to which connector (or connector half) the
pixel stream is being sent to.

Now that the bug report is in good hands, I'll be watching that,
rather than this list.

Regards
-- Charlie

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F13: nouveau driver seems to swap video streams on NVIDIA NVS-290.
 

> I guess you've hit the same bug as me, I even have the same video
> card.
> ...
> Michal

Michal: Seems pretty similar to me too. In any event, per the prior
suggestion, I filed the following bug report:

https://bugzilla.redhat.com/show_bug.cgi?id=602492

Seems like we have gotten past the initial confusion with monitor
position as opposed to which connector (or connector half) the
pixel stream is being sent to.

Now that the bug report is in good hands, I'll be watching that,
rather than this list.

Regards
-- Charlie
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