Nouveau - Aug 2011 - [Bug 40507] New: NV50 multi GPU only one GPU is used by X

https://bugs.freedesktop.org/show_bug.cgi?id=40507

           Summary: NV50 multi GPU only one GPU is used by X
           Product: xorg
           Version: 7.6
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: thomas at partyflock.nl
         QAContact: xorg-team at lists.x.org


Created an attachment (id=50746)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=50746)
output of dmesg command

This concerns a Quadro NVS 450 with two/dual GPU, driver NV50.

Everything is recognized, dual head on the primary GPU works fine, even
unplugging and then plugging in the monitors (DP-1, DP-2, DP-3 and DP-4), but
after a day and a halve I cannot find any more information online and have to
get to work (using the proprietary drivers for now).

Using debian with:
linux-image-3.0.0-1-amd64 3.0.0-3
xorg 7.6+8
libdrm-nouveau1a 2.4.26-1
xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1+b1

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https://bugs.freedesktop.org/show_bug.cgi?id=40507

--- Comment #1 from Thomas van Gulick <thomas at partyflock.nl> 2011-08-31
01:19:39 PDT ---
Created an attachment (id=50747)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=50747)
output of lspci -i

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--- Comment #2 from Thomas van Gulick <thomas at partyflock.nl> 2011-08-31
01:20:05 PDT ---
Created an attachment (id=50748)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=50748)
output of dmesg

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Thomas van Gulick <thomas at partyflock.nl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #50746|0                           |1
        is obsolete|                            |

--- Comment #3 from Thomas van Gulick <thomas at partyflock.nl> 2011-08-31
01:21:16 PDT ---
Created an attachment (id=50749)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=50749)
X server configuration

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Thomas van Gulick <thomas at partyflock.nl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #50749|0                           |1
        is obsolete|                            |

--- Comment #4 from Thomas van Gulick <thomas at partyflock.nl> 2011-08-31
01:21:51 PDT ---
Created an attachment (id=50750)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=50750)
X start error log

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--- Comment #5 from Thomas van Gulick <thomas at partyflock.nl> 2011-08-31
01:22:08 PDT ---
Created an attachment (id=50751)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=50751)
X server

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--- Comment #6 from Thomas van Gulick <thomas at partyflock.nl> 2011-08-31
01:24:22 PDT ---
Pardon the upload problems. I had no idea bugzilla was so basic in it's
recognition of filetypes and functionality!

Please ignore above attachments comments, I've made sure the four
attachments
are correct and easy viewable now.

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--- Comment #7 from Pekka Paalanen <pq at iki.fi> 2011-08-31 01:43:30 PDT
---
Could you explain what your problem is?
What do you expect to get, and what you have instead?

So far I have failed to see anything wrong here.

Thanks.

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--- Comment #8 from Thomas van Gulick <thomas at partyflock.nl> 2011-08-31
02:09:14 PDT ---
The GPU on PCI:4:0:0 cannot be used. It's in xorg.conf but won't be
used.

If I use only PC:4:0:0 and not PCI:5:0:0, X cannot start. It seems to always
skip that GPU.

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--- Comment #9 from Emil Velikov <emil.l.velikov at gmail.com> 2011-08-31
12:08:26 PDT ---
Hi Thomas

Looking at you logs/conf files I can see that
1. The nouveau kernel module is loaded for every GPU on your card
2. The xf86-video-nouveau - X driver is loaded for each GPU
3. Each GPU is controlling it's associated display

Note that when the system boots only one GPU is initialised, whereas the other
is initialised by nouveau at a later stage

"[drm] nouveau 0000:04:00.0: Adaptor not initialised, running VBIOS init
tables."

Thus can you please be a bit more informative but saying what exactly do you
want to do, and what your expectations are
eg.
"I want to use only GPU at PCI 4:0:0 and the other to be disabled" or
"GPU xxx should control display xx but it's not"

Cheers
Emil

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--- Comment #10 from Pekka Paalanen <pq at iki.fi> 2011-08-31 12:28:07 PDT
---
Emil, that is exactly what I asked, and he explained. He is using ZaphodHeads,
so the two driver instances in X log are both for the same one card, only
different outputs. The other card is not taken into use, and I don't see
error
messages related to ignoring it, either.

He should be having three driver instances in X logs, as per his configuration.
He is missing all the instances for the card "04", IIRC.

He is also using Xinerama.

Thomas, maybe it would help to show the X and kernel logs, when you try to use
only the problematic card (GPU)?

Makes me wonder, if cold booting doesn't really support dual-GPU card's
2nd
GPU...

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--- Comment #11 from Emil Velikov <emil.l.velikov at gmail.com> 2011-08-31
12:52:02 PDT ---
I got carried away "helping" people today
Apologies

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--- Comment #12 from Thomas van Gulick <thomas at partyflock.nl>
2011-08-31 13:09:01 PDT ---
Created an attachment (id=50776)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=50776)
Xorg log for proprietary nVidia driver

Hmm, I'll run it with only the PCI:4:0:0 device when I have some time to
close
all the current open applications and workspaces :)

As far as I remember it just doesn't initialize any nouveau driver, no real
useful messages, otherwise I'd have more leads to search further or show
here.

Just for the record I've included my current Xorg log for my current session
with proprietary driver.

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--- Comment #13 from Thomas van Gulick <thomas at partyflock.nl>
2011-10-22 14:30:13 PDT ---

I've took the time to try and test the GPU on PCI:0:4:0:0, and that seems to
not work at all.

I notice there is an asterisk in front of the PCI:0:5:0:0 line in the
Xorg.0.log, might that mean something like only that device is enabled?

I'll include all the configs and logs for the very simple test case trying
to
use the non working device.

Also, here's someone with seemingly the same problem. The solution there was
to
use the proprietary driver. Of course I will too after this post, but nouveau
seems to perform much much better and is of course open source and I would like
to use it and would like other with multiple cards and this same problem to be
able to use it too!

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--- Comment #14 from Thomas van Gulick <thomas at partyflock.nl>
2011-10-22 14:31:06 PDT ---
Created attachment 52637
  --> https://bugs.freedesktop.org/attachment.cgi?id=52637
Xorg log for test case of non working card

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--- Comment #15 from Thomas van Gulick <thomas at partyflock.nl>
2011-10-22 14:32:29 PDT ---
Created attachment 52638
  --> https://bugs.freedesktop.org/attachment.cgi?id=52638
ls of /sys/card/drm

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--- Comment #16 from Thomas van Gulick <thomas at partyflock.nl>
2011-10-22 14:45:26 PDT ---
Another intereseting note. Displaying an image to the device which X does not
recognize is no problem, using fbi on /dev/fb0, using nouveaufb.

Could be that it has nothing with the nouveau driver, but the way X initializes
nouveau, in which case this ticket should probably be moved to another section?

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #17 from Ilia Mirkin <imirkin at alum.mit.edu> ---
It appears that this bug report has laid dormant for quite a while. Sorry we
haven't gotten to it. Since we fix bugs all the time, chances are pretty
good
that your issue has been fixed with the latest software. Please give it a shot.
(Linux kernel 3.10.7, xf86-video-nouveau 1.0.9, mesa 9.1.6, or their git
versions.) If upgrading to the latest isn't an option for you, your
distro's
bugzilla is probably the right destination for your bug report.

In an effort to clean up our bug list, we're pre-emptively closing all bugs
that haven't seen updates since 2011. If the original issue remains, please
make sure to provide fresh info, see http://nouveau.freedesktop.org/wiki/Bugs/
for what we need to see, and re-open this one.

Thanks,

The Nouveau Team

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