[Bug 99499] [REGRESSION, bisected] KMS hard-freezes around fbcon initialization on NV1A

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99499

            Bug ID: 99499
           Summary: [REGRESSION, bisected] KMS hard-freezes around fbcon
                    initialization on NV1A
           Product: DRI
           Version: unspecified
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/other
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: bonbons at sysophe.eu

Created attachment 129101
  --> https://bugs.freedesktop.org/attachment.cgi?id=129101&action=edit
Kernel config for regression area

Kernel 4.2 works fine while 4.3 and later fail by freezing hard.

On failure the last kernel message output via netconsole is:
  nouveau 0000:02:00.0: DRM: allocated 1920x1080 fb: 0x4000, bo dd258000

Bisected as follow:
git bisect start 'drivers/gpu/drm/'
# bad: [34cdc49bf8ea385c1b3039be72cf91f98ddf8bbc] sd: Stop disks on reboot
git bisect bad 34cdc49bf8ea385c1b3039be72cf91f98ddf8bbc
# good: [64291f7db5bd8150a74ad2036f1037e6a0428df2] Linux 4.2
git bisect good 64291f7db5bd8150a74ad2036f1037e6a0428df2
# good: [0b2daf09cf3c9893872d68f0ce9a3f4b7e3ff06c] drm/amdgpu: add some common
definitions to amd_shared.h
git bisect good 0b2daf09cf3c9893872d68f0ce9a3f4b7e3ff06c
# good: [a1bfb29a33521efa6b1714589bf68cb4afebacb1] drm/nouveau/device: split
user device implementation out on its own
git bisect good a1bfb29a33521efa6b1714589bf68cb4afebacb1
# bad: [73bf1b7be7aab60d7c651402441dd0b0b4991098] Merge branch 'drm-next-4.3'
of git://people.freedesktop.org/~agd5f/linux into drm-next
git bisect bad 73bf1b7be7aab60d7c651402441dd0b0b4991098
# bad: [ae0a5b2dd2f54584d677701d989732b464b6d8c9] drm/nouveau/mc/gf100-: handle
second interrupt tree
git bisect bad ae0a5b2dd2f54584d677701d989732b464b6d8c9
# good: [0710cc31482ae3711367c42e61580126c50c8ec0] drm/nouveau/dma: convert
user classes to new-style nvkm_object
git bisect good 0710cc31482ae3711367c42e61580126c50c8ec0
# good: [8de65bd0901e2ee7a485a158bfe9e4631cc00644] drm/nouveau/devinit: run
devinit scripts right after preinit
git bisect good 8de65bd0901e2ee7a485a158bfe9e4631cc00644
# good: [e5b31ca63249f03e56529dcd4260b23196ce2c28] drm/nouveau/ce: convert to
new-style nvkm_engine
git bisect good e5b31ca63249f03e56529dcd4260b23196ce2c28
# bad: [97070f23c60869830039b216ff88230f54ef7107] drm/nouveau/pm: convert to
new-style nvkm_engine
git bisect bad 97070f23c60869830039b216ff88230f54ef7107
# good: [70aa8670e5229766f12c4b818a68aa61913df0b6] drm/nouveau/disp: convert to
new-style nvkm_engine
git bisect good 70aa8670e5229766f12c4b818a68aa61913df0b6
# bad: [c85ee6ca79590cd51356bf24fb8936bc352138cf] drm/nouveau/gr: convert to
new-style nvkm_engine
git bisect bad c85ee6ca79590cd51356bf24fb8936bc352138cf
# good: [13de7f462902d1a452d501cdb2d06ef02cabbfff] drm/nouveau/fifo: convert to
new-style nvkm_engine
git bisect good 13de7f462902d1a452d501cdb2d06ef02cabbfff
# first bad commit: [c85ee6ca79590cd51356bf24fb8936bc352138cf] drm/nouveau/gr:
convert to new-style nvkm_engine

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