Comment 31 for bug 1300349

After much confusion on my part, I believe the bisect is done:

da612d880fbc598ac0efcef579355fb90d4bca4e is the first bad commit
commit da612d880fbc598ac0efcef579355fb90d4bca4e
Author: Paulo Zanoni <email address hidden>
Date: Mon Aug 6 18:45:01 2012 -0300

    drm/i915: add more Haswell PCI IDs

    Also properly indent the HB IDs.

    Reviewed-by: Rodrigo Vivi <email address hidden>
    Signed-off-by: Paulo Zanoni <email address hidden>
    Signed-off-by: Daniel Vetter <email address hidden>

:040000 040000 fb462a83c40d63ddfb6a20c9c7c920b56e3ea693 d70ab73c5d1ad1121746364d2e91bc58840ff0b4 M drivers

# bad: [a0d271cbfed1dd50278c6b06bead3d00ba0a88f9] Linux 3.6
# good: [0d7614f09c1ebdbaa1599a5aba7593f147bf96ee] Linux 3.6-rc1
git bisect start 'v3.6' 'v3.6-rc1'
# bad: [4ae4614712e0a354c9e6c286c0db1612246766ce] Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
git bisect bad 4ae4614712e0a354c9e6c286c0db1612246766ce
# bad: [96ff705638e3d61b1e45a047c0f9f3bb622fa32f] apple_gmux: Add support for newer hardware
git bisect bad 96ff705638e3d61b1e45a047c0f9f3bb622fa32f
# good: [88de3d0d714bff03b2e0a3fcd5b8b346a392e9ea] Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
git bisect good 88de3d0d714bff03b2e0a3fcd5b8b346a392e9ea
# bad: [d3b8e0dc828f8ec9cc895bb46e8c51b2763e9d2c] Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
git bisect bad d3b8e0dc828f8ec9cc895bb46e8c51b2763e9d2c
# good: [3bf671af14d591ede9251acb0085e8017f3705e7] Merge branch 'fixes-for-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds
git bisect good 3bf671af14d591ede9251acb0085e8017f3705e7
# bad: [f00245f182fab57c5eed28a50764600b2bf1ccdb] drm/radeon/kms: reorder code in r600_check_texture_resource
git bisect bad f00245f182fab57c5eed28a50764600b2bf1ccdb
# bad: [959f724728b6a1cb5185230972119dd7bc8b610e] drm/udl: Use ERR_CAST inlined function instead of ERR_PTR(PTR_ERR(.. [1]
git bisect bad 959f724728b6a1cb5185230972119dd7bc8b610e
# good: [f00f979145756e39b5512d7d4e4050534d1c3d7f] i915: don't map imported dma-bufs for dmar.
git bisect good f00f979145756e39b5512d7d4e4050534d1c3d7f
# bad: [da612d880fbc598ac0efcef579355fb90d4bca4e] drm/i915: add more Haswell PCI IDs
git bisect bad da612d880fbc598ac0efcef579355fb90d4bca4e
# good: [bcf9dcc1e6269fac674e41f25d007ff75f76e840] drm/i915: Workaround hang with BSD and forcewake on SandyBridge
git bisect good bcf9dcc1e6269fac674e41f25d007ff75f76e840
# good: [5ab3633d6907018b0b830a720e877c3884d679c3] drm/i915: make rc6 in sysfs functions conditional
git bisect good 5ab3633d6907018b0b830a720e877c3884d679c3