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Date:   Fri, 25 Dec 2020 07:34:08 +0000
From:   Jamie Heilman <jamie@...ible.transient.net>
To:     Ben Skeggs <bskeggs@...hat.com>, nouveau@...ts.freedesktop.org
Cc:     linux-kernel@...r.kernel.org
Subject: nouveau regression post v5.8, still present in v5.10

Something between v5.8 and v5.9 has resulted in periodically losing video.
Unfortunately, I can't reliably reproduce it, it seems to happen every
once in a long while---I can go weeks without an occurance, but it
always seems to happen after my workstation has been idle long enough
to screen blank and put the monitor to sleep.  I'm using a single
display (Dell 2405FPW) connected via DVI, running X (Xorg 1.20.x from
Debian sid).  I don't really do anything fancy, xterms, a browser or
two, play the occasional video, but like I said, I can't reliably
reproduce this.  I've had it happen about 11 times since August.

lspci -vv output is:

01:00.0 VGA compatible controller: NVIDIA Corporation G86 [Quadro NVS 290] (rev a1) (prog-if 00 [VGA controller])
        Subsystem: NVIDIA Corporation G86 [Quadro NVS 290]
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 28
        Region 0: Memory at fc000000 (32-bit, non-prefetchable) [size=16M]
        Region 1: Memory at d0000000 (64-bit, prefetchable) [size=256M]
        Region 3: Memory at fa000000 (64-bit, non-prefetchable) [size=32M]
        Region 5: I/O ports at dc80 [size=128]
        Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: [60] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
                Address: 00000000fee01004  Data: 4023
        Capabilities: [78] Express (v1) Endpoint, MSI 00
                DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 <4us
                        ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 25.000W
                DevCtl: CorrErr- NonFatalErr+ FatalErr+ UnsupReq-
                        RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+
                        MaxPayload 128 bytes, MaxReadReq 512 bytes
                DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- TransPend-
                LnkCap: Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Exit Latency L0s <512ns, L1 <4us
                        ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp-
                LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s (ok), Width x16 (ok)
                        TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
        Capabilities: [100 v1] Virtual Channel
                Caps:   LPEVC=0 RefClk=100ns PATEntryBits=1
                Arb:    Fixed- WRR32- WRR64- WRR128-
                Ctrl:   ArbSelect=Fixed
                Status: InProgress-
                VC0:    Caps:   PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
                        Arb:    Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
                        Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=01
                        Status: NegoPending- InProgress-
        Capabilities: [128 v1] Power Budgeting <?>
        Capabilities: [600 v1] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
        Kernel driver in use: nouveau

The last time this happened, this is what got logged:

nouveau 0000:01:00.0: disp: ERROR 5 [INVALID_STATE] 06 [] chid 1 mthd 0080 data 00000001
nouveau 0000:01:00.0: disp: Base 1:
nouveau 0000:01:00.0: disp:        0084: 00000000              
nouveau 0000:01:00.0: disp:        0088: 00000000              
nouveau 0000:01:00.0: disp:        008c: 00000000              
nouveau 0000:01:00.0: disp:        0090: 00000000              
nouveau 0000:01:00.0: disp:        0094: 00000000              
nouveau 0000:01:00.0: disp:        00a0: 00000060 -> 00000070
nouveau 0000:01:00.0: disp:        00a4: 00000000 -> f0000000
nouveau 0000:01:00.0: disp:        00c0: 00000000              
nouveau 0000:01:00.0: disp:        00c4: 00000000              
nouveau 0000:01:00.0: disp:        00c8: 00000000              
nouveau 0000:01:00.0: disp:        00cc: 00000000              
nouveau 0000:01:00.0: disp:        00e0: 40000000              
nouveau 0000:01:00.0: disp:        00e4: 00000000              
nouveau 0000:01:00.0: disp:        00e8: 00000000              
nouveau 0000:01:00.0: disp:        00ec: 00000000              
nouveau 0000:01:00.0: disp:        00fc: 00000000              
nouveau 0000:01:00.0: disp:        0100: fffe0000              
nouveau 0000:01:00.0: disp:        0104: 00000000              
nouveau 0000:01:00.0: disp:        0110: 00000000              
nouveau 0000:01:00.0: disp:        0114: 00000000              
nouveau 0000:01:00.0: disp: Base 1 - Image 0:
nouveau 0000:01:00.0: disp:        0800: 00009500              
nouveau 0000:01:00.0: disp:        0804: 00000000              
nouveau 0000:01:00.0: disp:        0808: 04b00780              
nouveau 0000:01:00.0: disp:        080c: 00007804              
nouveau 0000:01:00.0: disp:        0810: 0000cf00              
nouveau 0000:01:00.0: disp: Base 1 - Image 1:
nouveau 0000:01:00.0: disp:        0c00: 00009500              
nouveau 0000:01:00.0: disp:        0c04: 00000000              
nouveau 0000:01:00.0: disp:        0c08: 04b00780              
nouveau 0000:01:00.0: disp:        0c0c: 00007804              
nouveau 0000:01:00.0: disp:        0c10: 0000cf00              
nouveau 0000:01:00.0: disp: ERROR 5 [INVALID_STATE] 06 [] chid 1 mthd 0080 data 00000001
nouveau 0000:01:00.0: disp: Base 1:
nouveau 0000:01:00.0: disp:        0084: 00000000              
nouveau 0000:01:00.0: disp:        0088: 00000000              
nouveau 0000:01:00.0: disp:        008c: 00000000              
nouveau 0000:01:00.0: disp:        0090: 00000000              
nouveau 0000:01:00.0: disp:        0094: 00000000              
nouveau 0000:01:00.0: disp:        00a0: 00000060 -> 00000070
nouveau 0000:01:00.0: disp:        00a4: 00000000 -> f0000000
nouveau 0000:01:00.0: disp:        00c0: 00000000              
nouveau 0000:01:00.0: disp:        00c4: 00000000              
nouveau 0000:01:00.0: disp:        00c8: 00000000              
nouveau 0000:01:00.0: disp:        00cc: 00000000              
nouveau 0000:01:00.0: disp:        00e0: 40000000              
nouveau 0000:01:00.0: disp:        00e4: 00000000              
nouveau 0000:01:00.0: disp:        00e8: 00000000              
nouveau 0000:01:00.0: disp:        00ec: 00000000              
nouveau 0000:01:00.0: disp:        00fc: 00000000              
nouveau 0000:01:00.0: disp:        0100: fffe0000              
nouveau 0000:01:00.0: disp:        0104: 00000000              
nouveau 0000:01:00.0: disp:        0110: 00000000              
nouveau 0000:01:00.0: disp:        0114: 00000000              
nouveau 0000:01:00.0: disp: Base 1 - Image 0:
nouveau 0000:01:00.0: disp:        0800: 00009500              
nouveau 0000:01:00.0: disp:        0804: 00000000              
nouveau 0000:01:00.0: disp:        0808: 04b00780              
nouveau 0000:01:00.0: disp:        080c: 00007804              
nouveau 0000:01:00.0: disp:        0810: 0000cf00              
nouveau 0000:01:00.0: disp: Base 1 - Image 1:
nouveau 0000:01:00.0: disp:        0c00: 00009500              
nouveau 0000:01:00.0: disp:        0c04: 00000000              
nouveau 0000:01:00.0: disp:        0c08: 04b00780              
nouveau 0000:01:00.0: disp:        0c0c: 00007804              
nouveau 0000:01:00.0: disp:        0c10: 0000cf00              
nouveau 0000:01:00.0: DRM: core notifier timeout
nouveau 0000:01:00.0: DRM: base-0: timeout

I've got logs of all of this, if they help I can collect them.  The
timeout message are consistent the error messages a little less so.

If there's more debugging I can do when this happens, I'd love to know
what it is.

kernel config: http://audible.transient.net/~jamie/k/nouveau.config-5.10.0
dmesg at boot: http://audible.transient.net/~jamie/k/nouveau.dmesg

-- 
Jamie Heilman                     http://audible.transient.net/~jamie/

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