[Nouveau] [Bug 98386] [NVE7] bus: MMIO write of FAULT at [ IBUS ], Pointer to {TDMS, flat panel} table invalid

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98386

--- Comment #25 from Andrei Borzenkov <arvidjaar at gmail.com> ---
Have it on Dell Latitude E5450

00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 5500
[8086:1616] (rev 09)
03:00.0 3D controller [0302]: NVIDIA Corporation GM108M [GeForce 830M]
[10de:1340] (rev a2)

VERSION="18.04.1 LTS (Bionic Beaver)"
Linux bor-Latitude-E5450 4.18.0-13-generic #14~18.04.1-Ubuntu SMP Thu Dec 6
14:09:52 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Dec 20 21:10:10 bor-Latitude-E5450 kernel: fb: switching to inteldrmfb from EFI
VGA
Dec 20 21:10:10 bor-Latitude-E5450 kernel: Console: switching to colour dummy
device 80x25
Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Replacing VGA console driver
Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] ACPI BIOS requests an
excessive sleep of 20000 ms, using 1500 ms instead
Dec 20 21:10:10 bor-Latitude-E5450 kernel: MXM: GUID detected in BIOS
Dec 20 21:10:10 bor-Latitude-E5450 kernel: ACPI Warning:
\_SB.PCI0.RP05.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI
requires [Package] (20180531/nsarguments-66)
Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Supports vblank timestamp
caching Rev 2 (21.10.2013).
Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Driver supports precise vblank
timestamp query.
Dec 20 21:10:10 bor-Latitude-E5450 kernel: pci 0000:03:00.0: optimus
capabilities: enabled, status dynamic power, hda bios codec supported
Dec 20 21:10:10 bor-Latitude-E5450 kernel: VGA switcheroo: detected Optimus DSM
method \_SB_.PCI0.RP05.PEGP handle
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau: detected PR support, will
not use DSM
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: enabling
device (0006 -> 0007)
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: NVIDIA GM108
(118000a2)
Dec 20 21:10:10 bor-Latitude-E5450 kernel: i915 0000:00:02.0: vgaarb: changed
VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Initialized i915 1.6.0
20180514 for 0000:00:02.0 on minor 0
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: bios: version
82.08.18.00.2a
Dec 20 21:10:10 bor-Latitude-E5450 kernel: ACPI: Video Device [GFX0]
(multi-head: yes  rom: no  post: no)
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: fb: 2048 MiB
DDR3
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: bus: MMIO read
of 00000000 FAULT at 6013d4 [ IBUS ]
Dec 20 21:10:10 bor-Latitude-E5450 kernel: input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input7
Dec 20 21:10:10 bor-Latitude-E5450 kernel: ACPI: Video Device [PEGP]
(multi-head: no  rom: yes  post: no)
Dec 20 21:10:10 bor-Latitude-E5450 kernel: input: Video Bus as
/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:1d/LNXVIDEO:01/input/input8
Dec 20 21:10:10 bor-Latitude-E5450 kernel: fbcon: inteldrmfb (fb0) is primary
device
Dec 20 21:10:10 bor-Latitude-E5450 kernel: Console: switching to colour frame
buffer device 240x67
Dec 20 21:10:10 bor-Latitude-E5450 kernel: i915 0000:00:02.0: fb0: inteldrmfb
frame buffer device
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: bus: MMIO read
of 00000000 FAULT at 10ac08 [ IBUS ]
Dec 20 21:10:10 bor-Latitude-E5450 kernel: vga_switcheroo: enabled
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: DRM: GART:
1048576 MiB
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: DRM: Pointer
to TMDS table invalid
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: DRM: DCB
version 4.0
Dec 20 21:10:10 bor-Latitude-E5450 kernel: nouveau 0000:03:00.0: DRM: MM: using
COPY for buffer copies
Dec 20 21:10:10 bor-Latitude-E5450 kernel: [drm] Initialized nouveau 1.3.1
20120801 for 0000:03:00.0 on minor 1

The read fault at 10ac08 happens only ones during system boot, read fault
6013d4 happens apparently every time I suspend/resume.

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