Bug 92519 - xf86-video-intel not identifying all valid screen modes
Summary: xf86-video-intel not identifying all valid screen modes
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-10-18 08:58 UTC by Lund
Modified: 2016-05-11 10:20 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
xrandr --verbose output under xf86-video-intel 1:2.99.917+478+gdf72bc5-2 (1.53 KB, text/plain)
2015-10-18 09:09 UTC, Lund 		no flags Details
xrandr --verbose output under xf86-video-intel-1:2.99.917+381+g5772556-1 (3.88 KB, text/plain)
2015-10-18 09:11 UTC, Lund 		no flags Details
View All

Description Lund 2015-10-18 08:58:57 UTC 

    


    


      



        
          Comment 1
        

        
          Lund

        

        
        

        
          2015-10-18 09:09:46 UTC
        

      






Created attachment 118954 [details]
xrandr --verbose output under xf86-video-intel 1:2.99.917+478+gdf72bc5-2

    


    


      



        
          Comment 2
        

        
          Lund

        

        
        

        
          2015-10-18 09:11:38 UTC
        

      






Created attachment 118955 [details]
xrandr --verbose output under xf86-video-intel-1:2.99.917+381+g5772556-1

    


    


      



        
          Comment 3
        

        
          Lund

        

        
        

        
          2015-10-18 09:14:37 UTC
        

      






Please see the two attachments.

It appears that since upgrading xf86-video-intel to latest version xrandr is no longer able to detect all valid screen modes for my monitor.

I think xf86-video-intel must be the culprit as I can replicate the behaviour by just upgrading/downgrading this one package on my arch linux system (no other changes).

Thanks!

    


    


      



        
          Comment 4
        

        
          yann

        

        
        

        
          2016-05-04 09:05:18 UTC
        

      






Lund, can you retest with latest version to see if this is still reproducible?

    


    


      



        
          Comment 5
        

        
          Chris Wilson

        

        
        

        
          2016-05-04 09:18:47 UTC
        

      






The behaviour is not fully described, but it is probably

commit 627ef68a8cd7a51627d5b6a98cb0a5bdb1d9b534
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Sat Oct 31 09:27:35 2015 +0000

    sna: Don't extend the display mode cache for an unknown output
    
    When we enable the outputs initially, they only have the desired mode
    inherited from fbcon and have not do a full detect pass. For these we do
    not wish to extend the display mode cache on the output.
    
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

    



  






  














    


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