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Date:   Thu, 18 Jun 2020 22:01:06 +0200
From:   Borislav Petkov <bp@alien8.de>
To:     Ben Skeggs <bskeggs@redhat.com>
Cc:     dri-devel@lists.freedesktop.org, nouveau@lists.freedesktop.org,
        lkml <linux-kernel@vger.kernel.org>
Subject: 2dd4d163cd9c ("drm/nouveau: remove open-coded version of
 remove_conflicting_pci_framebuffers()")
Message-ID: <20200618200106.GF27951@zn.tnic>
MIME-Version: 1.0
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Sender: linux-kernel-owner@vger.kernel.org
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Hi,

my test box won't boot 5.8-rc1 all the way but stops at

...
fb0: switching to nouveaufb from EFI VGA
<-- EOF

I've bisected it to the commit in $Subject, see below. Unfortunately, it
doesn't revert cleanly so I can't really do the final test of reverting
it ontop of 5.8-rc1 to confirm that this one is really causing it.

Any ideas?

GPU is:

[    5.678614] fb0: switching to nouveaufb from EFI VGA
[    5.685577] Console: switching to colour dummy device 80x25
[    5.691865] nouveau 0000:03:00.0: NVIDIA GT218 (0a8c00b1)
[    5.814409] nouveau 0000:03:00.0: bios: version 70.18.83.00.08
[    5.823559] nouveau 0000:03:00.0: fb: 512 MiB DDR3
[    6.096680] [TTM] Zone  kernel: Available graphics memory: 8158364 KiB
[    6.103327] [TTM] Zone   dma32: Available graphics memory: 2097152 KiB
[    6.109951] [TTM] Initializing pool allocator
[    6.114405] [TTM] Initializing DMA pool allocator
[    6.119256] nouveau 0000:03:00.0: DRM: VRAM: 512 MiB
[    6.124285] nouveau 0000:03:00.0: DRM: GART: 1048576 MiB
[    6.129677] nouveau 0000:03:00.0: DRM: TMDS table version 2.0
[    6.135534] nouveau 0000:03:00.0: DRM: DCB version 4.0
[    6.140755] nouveau 0000:03:00.0: DRM: DCB outp 00: 02000360 00000000
[    6.147273] nouveau 0000:03:00.0: DRM: DCB outp 01: 02000362 00020010
[    6.153782] nouveau 0000:03:00.0: DRM: DCB outp 02: 028003a6 0f220010
[    6.160292] nouveau 0000:03:00.0: DRM: DCB outp 03: 01011380 00000000
[    6.166810] nouveau 0000:03:00.0: DRM: DCB outp 04: 08011382 00020010
[    6.173306] nouveau 0000:03:00.0: DRM: DCB outp 05: 088113c6 0f220010
[    6.179829] nouveau 0000:03:00.0: DRM: DCB conn 00: 00101064
[    6.185553] nouveau 0000:03:00.0: DRM: DCB conn 01: 00202165
[    6.196145] nouveau 0000:03:00.0: DRM: MM: using COPY for buffer copies
[    6.233659] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    6.311939] nouveau 0000:03:00.0: DRM: allocated 1920x1080 fb: 0x70000, bo (____ptrval____)
[    6.320736] fbcon: nouveaudrmfb (fb0) is primary device
[    6.392722] tsc: Refined TSC clocksource calibration: 3591.346 MHz
[    6.392788] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x33c46403b59, max_idle_ns: 440795293818 ns
[    6.392930] clocksource: Switched to clocksource tsc
[    6.509946] Console: switching to colour frame buffer device 240x67
[    6.546287] nouveau 0000:03:00.0: fb0: nouveaudrmfb frame buffer device
[    6.555021] [drm] Initialized nouveau 1.3.1 20120801 for 0000:03:00.0 on minor 0

Thx.

git bisect start
# good: [3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162] Linux 5.7
git bisect good 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162
# bad: [b3a9e3b9622ae10064826dccb4f7a52bd88c7407] Linux 5.8-rc1
git bisect bad b3a9e3b9622ae10064826dccb4f7a52bd88c7407
# bad: [ee01c4d72adffb7d424535adf630f2955748fa8b] Merge branch 'akpm' (patches from Andrew)
git bisect bad ee01c4d72adffb7d424535adf630f2955748fa8b
# bad: [16d91548d1057691979de4686693f0ff92f46000] Merge tag 'xfs-5.8-merge-8' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
git bisect bad 16d91548d1057691979de4686693f0ff92f46000
# good: [cfa3b8068b09f25037146bfd5eed041b78878bee] Merge tag 'for-linus-hmm' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
git bisect good cfa3b8068b09f25037146bfd5eed041b78878bee
# good: [3fd911b69b3117e03181262fc19ae6c3ef6962ce] Merge tag 'drm-misc-next-2020-05-07' of git://anongit.freedesktop.org/drm/drm-misc into drm-next
git bisect good 3fd911b69b3117e03181262fc19ae6c3ef6962ce
# bad: [1966391fa576e1fb2701be8bcca197d8f72737b7] mm/migrate.c: attach_page_private already does the get_page
git bisect bad 1966391fa576e1fb2701be8bcca197d8f72737b7
# good: [43c8546bcd854806736d8a635a0d696504dd4c21] drm/amdgpu: Add a UAPI flag for user to call mem_sync
git bisect good 43c8546bcd854806736d8a635a0d696504dd4c21
# good: [6cf991611bc72c077f0cc64e23987341ad7ef41e] Merge tag 'drm-intel-next-2020-05-15' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
git bisect good 6cf991611bc72c077f0cc64e23987341ad7ef41e
# bad: [dc455f4c888365595c0a13da445e092422d55b8d] drm/nouveau/dispnv50: fix runtime pm imbalance on error
git bisect bad dc455f4c888365595c0a13da445e092422d55b8d
# bad: [2dd4d163cd9c15432524aa9863155bc03a821361] drm/nouveau: remove open-coded version of remove_conflicting_pci_framebuffers()
git bisect bad 2dd4d163cd9c15432524aa9863155bc03a821361
# good: [c41219fda6e04255c44d37fd2c0d898c1c46abf1] Merge tag 'drm-intel-next-fixes-2020-05-20' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
git bisect good c41219fda6e04255c44d37fd2c0d898c1c46abf1
# good: [fd44028ff145ffb2d03c877d74f479da04ac2c62] drm/nouveau/acr: ensure falcon providing acr functions is bootstrapped first
git bisect good fd44028ff145ffb2d03c877d74f479da04ac2c62
# good: [fa4f4c213f5f7807360c41f2501a3031a9940f3a] drm/nouveau/kms: Support NVIDIA format modifiers
git bisect good fa4f4c213f5f7807360c41f2501a3031a9940f3a
# good: [d2bcfce7f8a4ba8df28d3bebb81225bd7f9c046f] drm/nouveau/ibus: use nvkm_subdev_new_()
git bisect good d2bcfce7f8a4ba8df28d3bebb81225bd7f9c046f
# good: [fb172f5fe880cd0ddb4370b2fcc9ad4848c98bbb] drm/nouveau/gr/gk20a: move MODULE_FIRMWARE firmware definitions
git bisect good fb172f5fe880cd0ddb4370b2fcc9ad4848c98bbb
# first bad commit: [2dd4d163cd9c15432524aa9863155bc03a821361] drm/nouveau: remove open-coded version of remove_conflicting_pci_framebuffers()


-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette