[Nouveau] [Bug 98386] New: [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

            Bug ID: 98386
           Summary: [NVE7] bus: MMIO write of FAULT at [ IBUS ], Pointer
                    to {TDMS,flat panel) table invalid
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: bruno.pagani at ens-lyon.org
        QA Contact: xorg-team at lists.x.org

Hi, following https://bugzilla.freedesktop.org/show_bug.cgi?id=70354, I’m still
having some error messages in dmesg.

This is on first loading:
[  454.756165] MXM: GUID detected in BIOS
[  454.756253] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[  454.756309] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type
mismatch - Found [Buffer], ACPI requires [Package] (20160422/nsarguments-95)
[  454.756430] pci 0000:02:00.0: optimus capabilities: enabled, status dynamic
power, hda bios codec supported
[  454.756432] VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG0.PEGP
handle
[  454.756433] nouveau: detected PR support, will not use DSM
[  454.756510] nouveau 0000:02:00.0: NVIDIA GK107 (0e7240a2)
[  454.775702] nouveau 0000:02:00.0: bios: version 80.07.b3.00.21
[  454.919182] nouveau 0000:02:00.0: fb: 2048 MiB GDDR5
[  454.919271] nouveau 0000:02:00.0: bus: MMIO write of 00000002 FAULT at
4188ac [ IBUS ]
[  454.989821] vga_switcheroo: enabled
[  454.989938] [TTM] Zone  kernel: Available graphics memory: 8169036 kiB
[  454.989939] [TTM] Zone   dma32: Available graphics memory: 2097152 kiB
[  454.989940] [TTM] Initializing pool allocator
[  454.989943] [TTM] Initializing DMA pool allocator
[  454.989951] nouveau 0000:02:00.0: DRM: VRAM: 2048 MiB
[  454.989951] nouveau 0000:02:00.0: DRM: GART: 1048576 MiB
[  454.989954] nouveau 0000:02:00.0: DRM: Pointer to TMDS table invalid
[  454.989956] nouveau 0000:02:00.0: DRM: DCB version 4.0
[  454.989957] nouveau 0000:02:00.0: DRM: Pointer to flat panel table invalid
[  455.191639] nouveau 0000:02:00.0: DRM: MM: using COPY for buffer copies
[  455.191647] [drm] Initialized nouveau 1.3.1 20120801 for 0000:02:00.0 on
minor 1
[  460.192102] nouveau 0000:02:00.0: DRM: evicting buffers...
[  460.192107] nouveau 0000:02:00.0: DRM: waiting for kernel channels to go
idle...
[  460.192139] nouveau 0000:02:00.0: DRM: suspending client object trees...
[  460.198135] nouveau 0000:02:00.0: DRM: suspending kernel object tree...

Note the following lines (that appear in red in my console):
[  454.919271] nouveau 0000:02:00.0: bus: MMIO write of 00000002 FAULT at
4188ac [ IBUS ]
[  454.989954] nouveau 0000:02:00.0: DRM: Pointer to TMDS table invalid
[  454.989957] nouveau 0000:02:00.0: DRM: Pointer to flat panel table invalid

And then, on subsequent uses of the card:
[  470.170765] nouveau 0000:02:00.0: DRM: resuming kernel object tree...
[  470.245180] nouveau 0000:02:00.0: bus: MMIO write of ffffff1f FAULT at
6013d4 [ IBUS ]
[  470.266559] nouveau 0000:02:00.0: DRM: resuming client object trees...
[  476.071701] nouveau 0000:02:00.0: DRM: evicting buffers...
[  476.071703] nouveau 0000:02:00.0: DRM: waiting for kernel channels to go
idle...
[  476.071732] nouveau 0000:02:00.0: DRM: suspending client object trees...
[  476.077132] nouveau 0000:02:00.0: DRM: suspending kernel object tree...

And again (can provide any amount you want, only the two hex chains change):
[ 6579.503383] nouveau 0000:02:00.0: DRM: resuming kernel object tree...
[ 6579.586496] nouveau 0000:02:00.0: bus: MMIO write of 8000001f FAULT at
6013d4 [ IBUS ]
[ 6579.607798] nouveau 0000:02:00.0: DRM: resuming client object trees...
[ 6585.210796] nouveau 0000:02:00.0: DRM: evicting buffers...
[ 6585.210798] nouveau 0000:02:00.0: DRM: waiting for kernel channels to go
idle...
[ 6585.210825] nouveau 0000:02:00.0: DRM: suspending client object trees...
[ 6585.216211] nouveau 0000:02:00.0: DRM: suspending kernel object tree...

Not sure if it has any consequences, but since it appears in red, I supposed it
was worth reporting.

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