git bisect start
# good: [455c6fdbd219161bd09b1165f11699d6d73de11c] Linux 3.14
git bisect good 455c6fdbd219161bd09b1165f11699d6d73de11c
# bad: [1860e379875dfe7271c649058aeddffe5afd9d0d] Linux 3.15
git bisect bad 1860e379875dfe7271c649058aeddffe5afd9d0d
# good: [74a475acea49459721ae4b062d3da68c74259009] SubmittingPatches: add style recommendation to use imperative descriptions
git bisect good 74a475acea49459721ae4b062d3da68c74259009
# good: [5fb6b953bb7aa86a9c8ea760934982cedc45c52b] include/linux/syscalls.h: add sys_renameat2() prototype
git bisect good 5fb6b953bb7aa86a9c8ea760934982cedc45c52b
# bad: [88764e0a3ecf655950c4d46b323cf80e2e0ee481] Merge tag 'stable/for-linus-3.15-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
git bisect bad 88764e0a3ecf655950c4d46b323cf80e2e0ee481
# bad: [ce7613db2d8d4d5af2587ab5d7090055c4562201] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
git bisect bad ce7613db2d8d4d5af2587ab5d7090055c4562201
# bad: [adddaaf4885403a2f2180fb522b5b97e1469b328] drm/i915/dp: split edp_panel_vdd_on() for reuse
git bisect bad adddaaf4885403a2f2180fb522b5b97e1469b328
# bad: [8d85d27281095e4df6eb97ae84326b5814337337] drm/i915: Fix SNB GT_MODE register setup
git bisect bad 8d85d27281095e4df6eb97ae84326b5814337337
# good: [681432d9ca55c7761fb4bf0ef72c28ca81624070] drm/i915: WaDisableRHWOOptimizationForRenderHang isn't applicable to HSW
git bisect good 681432d9ca55c7761fb4bf0ef72c28ca81624070
# good: [c0cc8a556680afbfc6dc5033bdf9c8d2b85088e2] drm/i915: Short-circuit no-op vga_set_state()
git bisect good c0cc8a556680afbfc6dc5033bdf9c8d2b85088e2
# bad: [eb1bfe807cb7b62a326fa20df5e3118a32c6f923] drm/i915: allow re-use BIOS connector config for initial fbdev config v3
git bisect bad eb1bfe807cb7b62a326fa20df5e3118a32c6f923
# good: [3fddd40739de9c08099d1d488d24c42e0c210d6b] drm/i915: remove the vblank_wait hack from HSW+
git bisect good 3fddd40739de9c08099d1d488d24c42e0c210d6b
# good: [8bade1adc7459a9283eb93a4b312289ecdad1690] drm/i915: Stop pretending VLV has rc6+
git bisect good 8bade1adc7459a9283eb93a4b312289ecdad1690
# good: [fa9fa083d0606cb323f6105c17702460ea0a6780] drm/i915: read out hw state earlier v2
git bisect good fa9fa083d0606cb323f6105c17702460ea0a6780
# good: [bbb5eebf034be22fb4de6e9879a0933d3292cf2f] drm/i915: Some polish for the new pipestat_irq_handler
git bisect good bbb5eebf034be22fb4de6e9879a0933d3292cf2f
# good: [2f1046f304b1ab14ea611a01b85f3486f2b9ce5b] drm: export cmdline and preferred mode functions from fb helper
git bisect good 2f1046f304b1ab14ea611a01b85f3486f2b9ce5b
# first bad commit: [eb1bfe807cb7b62a326fa20df5e3118a32c6f923] drm/i915: allow re-use BIOS connector config for initial fbdev config v3