Nouveau - Nov 2010 - [Bug 31366] New: [drm][KMS][Regression] Screen shutdown during boot

https://bugs.freedesktop.org/show_bug.cgi?id=31366

           Summary: [drm][KMS][Regression] Screen shutdown during boot
           Product: xorg
           Version: git
          Platform: All
        OS/Version: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: vivaneon at gmail.com
         QAContact: xorg-team at lists.x.org


Created an attachment (id=40026)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=40026)
Dmesg of 2.6.36.x boot

Graphic Card : Nvidia 9500M (Hybrid SLI : chipset of the Dell Studio XPS 13
composed by a nvidia 9400GM and a 9200GS) Under Linux, only the 9400 is
detected and it always work fine.

I'm using nouveau on an Archlinux x86_64 GNU/linux system. I have had a
great
KMS for months, but since the 2.6.35.x kernel, I lost it.

Instead of my KMS, my screen shutdown, and switch on again when X is launching,
and everything went nice, 2D,3D, dual screen etc.

I think it is a drm driver problem. Here is my dmesg with drm.debug=14 to have
a maximum of information, but there isn't really an error.

I tried with Ubuntu 10.10 32/64bits live CDs, but the results are the same,
however when I boot my "old" kernel 2.6.32.x, I still have my KMS of
course.

When I type Ctrl+Alt+F1, my computer switch on the tty, I can login and use it
blindly, but my screen show the last screen of my graphical environment.

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--- Comment #1 from Unbekandt L?o <vivaneon at gmail.com> 2010-11-03
15:32:46 PDT ---
Created an attachment (id=40028)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=40028)
Dmesg with debug of the 2.6.32.x kernel

Here is my other kernel dmesg with drm debug output.

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Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #40026|application/octet-stream    |text/plain
          mime type|                            |

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--- Comment #2 from Marcin Slusarz <marcin.slusarz at gmail.com>
2010-11-04 09:28:11 PDT ---
It's funny. On 2.6.32 kernel we detected both cards (NV98 and NVAC), but
couldn't initialize NV98 because we couldn't find its VBIOS. On 2.6.36
we again
detected both cards but this time we found _both_ VBIOSes. As NV98 was detected
first it drives primary framebuffer (fb0). 

So it's not a bug :).

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--- Comment #3 from Marcin Slusarz <marcin.slusarz at gmail.com>
2010-11-04 09:36:05 PDT ---
You can point fb0 at correct card by using fbcon=map: boot option.
See
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=Documentation/fb/fbcon.txt

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--- Comment #4 from Unbekandt L?o <vivaneon at gmail.com> 2010-11-04
12:02:58 PDT ---
Thanks for all, it works nice with fbcon=map:1

I'm happy to see that it's not a bug, it's a feature !

Sincerely,

Leo

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Unbekandt L?o <vivaneon at gmail.com> changed:

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

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