[Bug 108383] [CI][DRMTIP] igt at kms_setmode@invalid-clone-exclusive-crtc - warn - no modes for connector 83

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108383

--- Comment #2 from Imre Deak <imre.deak at intel.com> ---
Something fishy with framebuffer takeover from BIOS

<7>[   12.661656] [drm:drm_setup_crtcs] looking for preferred mode on connector
83 0
<7>[   12.661661] [drm:drm_setup_crtcs] found mode 3840x2160
<7>[   12.661666] [drm:drm_setup_crtcs] looking for cmdline mode on connector
101
<7>[   12.661671] [drm:drm_setup_crtcs] looking for preferred mode on connector
101 0
<7>[   12.661675] [drm:drm_setup_crtcs] found mode 1920x1080
<7>[   12.661681] [drm:drm_setup_crtcs] picking CRTCs for 8192x8192 config
<7>[   12.664943] [drm:drm_setup_crtcs] desired mode 3840x2160 set on crtc 45
(0,0)
<7>[   12.664965] [drm:drm_setup_crtcs] desired mode 1920x1080 set on crtc 63
(0,0)
<7>[   12.665080] [drm:intelfb_create [i915]] re-using BIOS fb
<7>[   12.665274] [drm:intelfb_create [i915]] allocated 1920x1080 fb:
0x00000000

instead of which we should throw away it and create a new one, followed by
pruning the eDP mode during fbdev probing:

<7>[   12.691895] [drm:drm_mode_debug_printmodeline] Modeline 84:"3840x2160" 60
533250 3840 3888 3920 4000 2160 2163 2168 2222 0x48 0xa
<7>[   12.691901] [drm:drm_mode_prune_invalid] Not using 3840x2160 mode:
VIRTUAL_X

which leads to no modes returned to the test. Looks like the test should do a
full reprobe, but instead it gets the cached version of the previously pruned
mode list.

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