Nouveau - Mar 2012 - [Bug 48090] New: Spam of system log with EDID messages

https://bugs.freedesktop.org/show_bug.cgi?id=48090

             Bug #: 48090
           Summary: Spam of system log with EDID messages
    Classification: Unclassified
           Product: Mesa
           Version: unspecified
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: mieszcz at mieszczak.com.pl


Created attachment 59271
  --> https://bugs.freedesktop.org/attachment.cgi?id=59271
Part of system log

When started kernel with kms-nouveau compiled in, the kernel logi is spammed
every 10 seconds with unknown EDID messages:

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https://bugs.freedesktop.org/show_bug.cgi?id=48090

--- Comment #1 from mieszcz at mieszczak.com.pl 2012-03-30 05:09:42 PDT ---
Created attachment 59272
  --> https://bugs.freedesktop.org/attachment.cgi?id=59272
EDID binary file

Edid data file for eDP-1 output

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https://bugs.freedesktop.org/show_bug.cgi?id=48090

Emil Velikov <emil.l.velikov at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
         QA Contact|                            |xorg-team at lists.x.org
            Product|Mesa                        |xorg
          Component|Drivers/DRI/nouveau         |Driver/nouveau

--- Comment #2 from Emil Velikov <emil.l.velikov at gmail.com> ---
Apart from the annoying messages are you experiencing any issues with nouveau ?

A few thing to help out meanwhile 

Try with output polling turned off
$echo 0 > /sys/module/drm_kms_helper/parameters/poll

or provide a customer EDID - see linux/Documentation/EDID/HOWTO.txt and
$modinfo drm_kms_helper

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--- Comment #3 from mieszcz at mieszczak.com.pl ---
Emil thank you for the tip, it acts good as workaround.
Now I just compiled new kernel with support of nouveau.
And except of above described log spamming it works perfectly.

But I don't understand one thing. Why the driver is mentioning different
EDID
data in the logs, and different in 
/sys/class/drm/card0/card0-eDP-1

While status of other video outputs is disabled

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--- Comment #4 from Emil Velikov <emil.l.velikov at gmail.com> ---
You're welcome, can you let me know are you loading the edid from
file/firmware?

And here is a bit of background about edid(s)

The edid has header (block 0) and extensions (block 1-...), each 128 bytes in
size

drm core tries to retrieve the whole edid, thus in your case is failing to
fetch extension #1 (block 1).

Can you do the following
* attach the edid retrieved from both the blob and nouveau
* clearly indicate which one is which

I assume the file attached was fetched with the blob running

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--- Comment #5 from mieszcz at mieszczak.com.pl ---
Created attachment 69635
  --> https://bugs.freedesktop.org/attachment.cgi?id=69635&action=edit
Edid File retreived using nvidia settings from blob driver

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mieszcz at mieszczak.com.pl changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #59272|0                           |1
        is obsolete|                            |

--- Comment #6 from mieszcz at mieszczak.com.pl ---
Created attachment 69636
  --> https://bugs.freedesktop.org/attachment.cgi?id=69636&action=edit
Edid file from nouveau retreived from /sys/class/drm/card0-DVI-I-1

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--- Comment #7 from mieszcz at mieszczak.com.pl ---
OK.

Now I understand.
Attached file was from nouveau.
Now I attached both: from blob, and from nouveau with right description.
If necessary, I could retreive and send bios from the video card, but
I need to know how to find it.

Right now I switched off polling, and the system works well. I tried to make it
with external edid file, but system don't use it. 
I put file 1920x1080.bin in /lib/firmware, but without success.


Thanks 

Mirek

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

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

--- Comment #8 from Ilia Mirkin <imirkin at alum.mit.edu> ---
This seems identical to the issue in the other bug, feel free to undup it if
you think I'm wrong. Unfortunately I can't tell the linux kernel version
you
used from your logs... but please try out linux 3.5 or 3.6 -- it should work
fine there, and also try with the latest kernel (e.g. 3.11-rc7) and report back
on whether things work again now (all without setting poll=0).

*** This bug has been marked as a duplicate of bug 64858 ***

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