Created attachment 123586 [details] kernel.log Nouveau has been wildly unstable for me ever since I upgraded from about Linux 4.1 to 4.4+. The latest manifestation of this bumpy ride was a full X.org server hang. I was still able to SSH in to capture some logs. 01:00.0 VGA compatible controller: NVIDIA Corporation G84 [GeForce 8600 GT] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Gigabyte Technology Co., Ltd G84 [GeForce 8600 GT] 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 27 Region 0: Memory at e4000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at d0000000 (64-bit, prefetchable) [size=256M] Region 3: Memory at e2000000 (64-bit, non-prefetchable) [size=32M] Region 5: I/O ports at 3000 [size=128] Expansion ROM at <ignored> [disabled] 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: 00000000fee0100c Data: 41e1 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 75.000W DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- 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 128 bytes Disabled- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x16, 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 Software versions in use: * Linux kernel 4.5.3-gentoo * X.org X11 server 1.18.3 * xf86-video-nouveau 1.0.12 * libdrm 2.4.68 * Mesa 11.2.1 Hang occurred shortly after quitting VLC. Kernel logs shows multiple errors from nouveau at this time, followed by an eventual segfault of vlc in libxcb.so.1.1.0 and segfault of kactivitymanage in libQt5Sql.so.5.6.0. I logged in via SSH and issued a reboot command, which took a while to process. Kernel log shows multiple "failed to idle channel" errors from nouveau, apparently one per X client. Also "fifo: channel … unload timeout" and "bsp: Watchdog interrupt, engine hung." See attached kernel log for specifics.
Created attachment 123587 [details] xorg.log The X.org server log shows "[mi] EQ overflowing" errors with backtraces.
I think the kernel upgrade was coincidental. I discovered several failed capacitors on my motherboard. Replacing them made my problems go away. Closing this bug report as invalid.
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