[Bug 50374] New: nouveau fails to obtain EDID from NV11 (nforce IGP)

[Bug 50374] New: nouveau fails to obtain EDID from NV11 (nforce IGP)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

https://bugs.freedesktop.org/show_bug.cgi?id=50374

             Bug #: 50374
           Summary: nouveau fails to obtain EDID from NV11 (nforce IGP)
    Classification: Unclassified
           Product: xorg
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
        ReportedBy: bonbons67-H4aWS73dXupiYsDpGMXq6A@public.gmane.org
         QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org


On an nforce1 based system nouveau (KMS) driver only used default (small) modes
while attached monitor can do up to 1280x1024. Looking at
/sys/class/drm/.../edid returns empty file.

System:
  Mainboard: MSI K7N420 Pro
  Monitor: Iiyama E431S, 1280x1024, connected with VGA
  Kernel is 3.4.0 (same applies to all older kernels tried).

System info (lspci, ioports, iomem) at attachment #33464 of bug #26670, the
Xorg.0.log and xorg.conf parts apply to past nv approach on that bug.

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[Bug 50374] nouveau fails to obtain EDID from NV11 (nforce IGP)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

https://bugs.freedesktop.org/show_bug.cgi?id=50374

--- Comment #1 from Ilya Ilyin <ilyin-qar0IOKqGHQ@public.gmane.org> 2012-07-07 07:49:31 PDT ---
use 
edid-decode /sys/class/drm/.../edid
to read the file

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[Bug 50374] nouveau fails to obtain EDID from NV11 (nforce IGP)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

https://bugs.freedesktop.org/show_bug.cgi?id=50374

--- Comment #2 from Bruno <bonbons67-H4aWS73dXupiYsDpGMXq6A@public.gmane.org> 2012-07-07 08:02:02 PDT ---
(In reply to comment #1)
> use 
> edid-decode /sys/class/drm/.../edid
> to read the file

That won't help as nouveau (and older UMS nv driver) are not getting I2C right
(they don't know where the right I2C bus is located) to do the EDID transfer.

It's rather a matter of either finding out how nvidia closed driver knows where
to look and replicating that or finding out where the I2C bus is for
nforce/mainboard.

see also: bug #26670

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[Bug 50374] nouveau fails to obtain EDID from NV11 (nforce IGP)

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https://bugs.freedesktop.org/show_bug.cgi?id=50374

--- Comment #3 from Ilia Mirkin <imirkin-FrUbXkNCsVf2fBVCVOL8/A@public.gmane.org> ---
Is this bug identical to #26534 which you also filed? If not, could you
describe in which way it is different?

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[Bug 50374] nouveau fails to obtain EDID from NV11 (nforce IGP)

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ]

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https://bugs.freedesktop.org/show_bug.cgi?id=50374

Bruno <bonbons67-H4aWS73dXupiYsDpGMXq6A@public.gmane.org> changed:

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

--- Comment #4 from Bruno <bonbons67-H4aWS73dXupiYsDpGMXq6A@public.gmane.org> ---
(In reply to comment #3)
> Is this bug identical to #26534 which you also filed? If not, could you
> describe in which way it is different?

Looks like I forgot about the older bug filed at the same time as bug #26670
and opened this one when bug #26670 got closed because of xf86-video-nv being
dropped.

*** This bug has been marked as a duplicate of bug 26534 ***

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