On 02/07/2013 10:16 AM, Flavio Castelli wrote:
For an unknown reason both my monitors ended up with a corrupted EDID.
They both provide VGA and DVI input. The VGA input works fine, while
DVI is broken because of the EDID issue.
Using these [1] instructions I have been able to read the EDID and fix
it. Unfortunately I'm not able to write it back to the eeprom.
I always get this message:
i2c i2c-1: sendbytes: NAK bailout.
This is what I usually see in /var/log/message
[dump of the EDID]
nouveau 0000:01:00.0: DVI-D-1: EDID block 0 invalid.
[drm] nouveau 0000:01:00.0: DDC responded, but no EDID for DVI-D-1
Do you know why writing to the monitor does not work? I suspect the
eeprom is write protected
Googling a bit I noticed the nvidia driver allows to ignore the EDID
returned by the monitor and use a custom one. I looks like the nouveau
drivers do not offer this feature. Am I wrong?
These are my specs:
* kernel: 3.4.11-2.16-desktop
* architecture: x86_64
* distribution: openSUSE 12.2
* xorg-x11-driver-video-nouveau-0.0.16_20120321_ab7291d-3.5.1.x86_64
* X.Org X Server 1.12.3
* NVIDIA Corporation G84M [Quadro FX 570M]
* Monitor 1: lenovo l220x wide
* Monitor 2: lenovo l2440p
What should I do?
Thanks in advance
Flavio
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I recently used a DOS program called ddcw.exe to fix the corrupted EDID
on one of my monitors.
See this site, http://byuu.org/articles/computing/edid
and get it here, http://www.komeil.com/download/2984
If that doesn't work, the drm_kms_helper module in newer kernels should
have a parameter to get around the problem.
See https://www.osadl.org/Single-View.111+M50eaf2f2c66.0.html
-Mike
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