git bisect start
# bad: [feaf3848a813a106f163013af6fcf6c4bfec92d9] Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block
git bisect bad feaf3848a813a106f163013af6fcf6c4bfec92d9
# good: [ed313489badef16d700f5a3be50e8fd8f8294bc8] Merge master.kernel.org:/home/rmk/linux-2.6-arm
git bisect good ed313489badef16d700f5a3be50e8fd8f8294bc8
# bad: [b4dcfbee3b536c9125762e8f6681ac6be0e9256b] Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
git bisect bad b4dcfbee3b536c9125762e8f6681ac6be0e9256b
# good: [9297524f6a2885bfb4e2431d658cd1ffaefbda41] Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-udf-2.6
git bisect good 9297524f6a2885bfb4e2431d658cd1ffaefbda41
# bad: [a6e470fd1bbfea8e51d2b10b0713e802b782f19a] Merge git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6
git bisect bad a6e470fd1bbfea8e51d2b10b0713e802b782f19a
# bad: [66a45cc4cc1c1f7d1ccae4d0fee261eab5560682] Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
git bisect bad 66a45cc4cc1c1f7d1ccae4d0fee261eab5560682
# good: [c4858ffc8f2dc850cb1f609c679b1ac1ad36ef0c] x86, pebs: fix PEBS record size configuration
git bisect good c4858ffc8f2dc850cb1f609c679b1ac1ad36ef0c
# good: [6133047aa64d2fd5b3b79dff74f696ded45615b2] drm/i915: execbuffer pins objects, no need to ensure they're still in the GTT
git bisect good 6133047aa64d2fd5b3b79dff74f696ded45615b2
# good: [b627c8b17ccacba38c975bc0f69a49fc4e5261c9] x86: always define DECLARE_PCI_UNMAP* macros
git bisect good b627c8b17ccacba38c975bc0f69a49fc4e5261c9
# bad: [461cba2d294fe83297edf8a6556912812903dce1] drm/i915: Save/restore HWS_PGA on suspend/resume
git bisect bad 461cba2d294fe83297edf8a6556912812903dce1
# bad: [52440211dcdc52c0b757f8b34d122e11b12cdd50] drm: move drm vblank initialization/cleanup to driver load/unload
git bisect bad 52440211dcdc52c0b757f8b34d122e11b12cdd50