[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

--- Comment #1 from Knut Petersen <Knut_Petersen at t-online.de> ---
Created attachment 98973
  --> https://bugs.freedesktop.org/attachment.cgi?id=98973&action=edit
dmesg with drm.debug=0xe

Hardware AOpen i915GMm-hfs motherboard, TFT monitor attached to VGA-1

As you can see, the monitor supports a resolution of 1280x1024, and that is
what kernels up to 3.14 use. After 3.14 that changes, and the reason is quite
obvious

[    4.002464] [drm:intelfb_create] no BIOS fb, allocating a new one
[    4.002470] [drm:i915_gem_object_create_stolen] creating stolen object:
size=1d5000
[    4.002481] [drm:i915_pages_create_for_stolen] offset=0x1f5000, size=1921024
[    4.003880] [drm:intelfb_create] allocated 800x600 fb: 0x00200000, bo
f638cc00
[    4.007426] fbcon: inteldrmfb (fb0) is primary device

Without testing I would think this is another regression introduced by commit
d978ef14456a38034f6c0e94a794129501f89200

Jesse, do you agree?

cu,
 Knut

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