Bug 523912

Summary: RFE: Standardised way to override EDID data
Product: [Fedora] Fedora Reporter: birger <b1r63r>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: low Docs Contact:
Priority: low    
Version: rawhideCC: ajax, itamar, kernel-maint, mcepl, mostroski, stymar
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Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2010-11-26 18:43:51 UTC Type: ---
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Description birger 2009-09-17 07:38:25 UTC 
Description of problem:
In some set-ups it is neccesary to override the EDID data supplied to the graphics card. A few scenarios are:
- KVM switches that filter the screens EDID data and refuse to offer high resolutions or wide-screen resolutions even if they work fine when forced through
- Long cables (20m or longer) where you may need to reduce max bandwith by removing access to the highest resolutions.


Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:
Some easy, standard way to override the EDID information used by KMS and X.

I would propose a file /etc/sysconfig/EDID with a syntax that links entries to some hardware path (graphics controller and port name). A tool to edit the configuration would be nice. A set of standard values, and the ability to fetch the EDID data from the currently attached screen. I could then connect a screen directly to the PC, grab the EDID data and save it to the config file and hook up the KVM switch again.


Additional info:
Comment 1 Matěj Cepl 2010-11-26 18:43:51 UTC 

*** This bug has been marked as a duplicate of bug 582712 ***