[Bug 78655] kernel 3.15 regression, drm i915 chooses wrong monitor resolution

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78655

Knut Petersen <Knut_Petersen at t-online.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #13 from Knut Petersen <Knut_Petersen at t-online.de> ---
(In reply to comment #12)
> Let's keep the bug open until Daniel/Jani has taken a patch. I'm not too
> keen on frobbing the EDID modes, as that may affect other things (and even
> userspace).

Ok. But as kernels up to 3.14.x seem to default to the same solution (although
silently) I would not expect problems ...

Excerpts from 3.14.1 dmesg on the same hardware:


[    3.480049] [drm:intel_gmbus_force_bit], enabling bit-banging on i915 gmbus
vga. force bit now 1
[    3.520395] [drm:intel_gmbus_force_bit], disabling bit-banging on i915 gmbus
vga. force bit now 0
[    3.520450] [drm:drm_edid_to_eld], ELD: no CEA Extension found
[    3.520470] [drm:drm_helper_probe_single_connector_modes],
[CONNECTOR:5:VGA-1] probed modes :
[    3.520480] [drm:drm_mode_debug_printmodeline], Modeline 86:"1280x1024" 75
135000 1280 1296 1440 1688 1024 1025 1028 1066 0x40 0x5
[    3.520489] [drm:drm_mode_debug_printmodeline], Modeline 78:"1280x1024" 60
108000 1280 1328 1440 1688 1024 1025 1028 1066 0x40 0x5
[    3.520499] [drm:drm_mode_debug_printmodeline], Modeline 93:"1152x864" 75
108000 1152 1216 1344 1600 864 865 868 900 0x40 0x5
[    3.520508] [drm:drm_mode_debug_printmodeline], Modeline 87:"1024x768" 75
78800 1024 1040 1136 1312 768 769 772 800 0x40 0x5
[    3.520518] [drm:drm_mode_debug_printmodeline], Modeline 88:"1024x768" 70
75000 1024 1048 1184 1328 768 771 777 806 0x40 0xa
[    3.520527] [drm:drm_mode_debug_printmodeline], Modeline 89:"1024x768" 60
65000 1024 1048 1184 1344 768 771 777 806 0x40 0xa
[    3.520536] [drm:drm_mode_debug_printmodeline], Modeline 90:"832x624" 75
57284 832 864 928 1152 624 625 628 667 0x40 0xa
[    3.520546] [drm:drm_mode_debug_printmodeline], Modeline 91:"800x600" 75
49500 800 816 896 1056 600 601 604 625 0x40 0x5
[    3.520555] [drm:drm_mode_debug_printmodeline], Modeline 92:"800x600" 72
50000 800 856 976 1040 600 637 643 666 0x40 0x5
[    3.520564] [drm:drm_mode_debug_printmodeline], Modeline 79:"800x600" 60
40000 800 840 968 1056 600 601 605 628 0x40 0x5
[    3.520574] [drm:drm_mode_debug_printmodeline], Modeline 80:"800x600" 56
36000 800 824 896 1024 600 601 603 625 0x40 0x5
[    3.520583] [drm:drm_mode_debug_printmodeline], Modeline 81:"640x480" 75
31500 640 656 720 840 480 481 484 500 0x40 0xa
[    3.520592] [drm:drm_mode_debug_printmodeline], Modeline 82:"640x480" 73
31500 640 664 704 832 480 489 491 520 0x40 0xa
[    3.520601] [drm:drm_mode_debug_printmodeline], Modeline 83:"640x480" 67
30240 640 704 768 864 480 483 486 525 0x40 0xa
[    3.520611] [drm:drm_mode_debug_printmodeline], Modeline 84:"640x480" 60
25200 640 656 752 800 480 490 492 525 0x40 0xa
[    3.520620] [drm:drm_mode_debug_printmodeline], Modeline 85:"720x400" 70
28320 720 738 846 900 400 412 414 449 0x40 0x6



[    3.982908] [drm:drm_setup_crtcs], 
[    3.982915] [drm:drm_enable_connectors], connector 5 enabled? yes
[    3.982921] [drm:drm_enable_connectors], connector 8 enabled? no
[    3.982926] [drm:drm_enable_connectors], connector 10 enabled? no
[    3.982932] [drm:drm_enable_connectors], connector 27 enabled? no
[    3.982937] [drm:drm_enable_connectors], connector 44 enabled? no
[    3.982943] [drm:drm_enable_connectors], connector 61 enabled? no
[    3.982948] [drm:drm_enable_connectors], connector 62 enabled? no
[    3.982954] [drm:drm_target_preferred], looking for cmdline mode on
connector 5
[    3.982960] [drm:drm_target_preferred], looking for preferred mode on
connector 5
[    3.982967] [drm:drm_target_preferred], found mode 1280x1024
[    3.982973] [drm:drm_setup_crtcs], picking CRTCs for 4096x4096 config
[    3.982981] [drm:drm_setup_crtcs], desired mode 1280x1024 set on crtc 3
[    3.982996] [drm:intelfb_create], no BIOS fb, allocating a new one
[    3.983003] [drm:i915_gem_object_create_stolen], creating stolen object:
size=500000
[    3.983013] [drm:i915_pages_create_for_stolen], offset=0x20000, size=5242880
[    3.988996] [drm:intelfb_create], allocated 1280x1024 fb: 0x00020000, bo
f6391c40
[    3.990289] fbcon: inteldrmfb (fb0) is primary device

cu,
 Knut

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