Re: drm/nouveau: crash regression in 3.5

["Ortwin Glück" <odi@odi.ch>]

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On 29.07.2012 22:15, Marcin Slusarz wrote:
> No, the real problem is: with "noaccel" we don't register "software engine",
> but vblank ISR relies on its existance and happily derefences NULL pointer.
>
> Now, this patch should fix it for real...

Unfortunately I am still seeing the crash. Without "noaccel" it works though 
(until X crashes the machine, but that is a different thing).

Thanks,

Ortwin

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Initializing cgroup subsys cpu
Linux version 3.5.0 (root@ortwin-hp) (gcc version 4.5.3 (Gentoo 4.5.3-r2 p1.1, pie-0.4.7) ) #3 SMP PREEMPT Thu Jul 26 14:42:43 CEST 2012
Command line: root=/dev/sda5 rootfstype=ext4 pciehp_force=1 nouveau.modeset=1 nouveau.noaccel=1 netconsole=4444@10.11.1.234/eth0,4444@10.11.1.19/00:17:f2:c7:5f:06 drm.debug=15
e820: BIOS-provided physical RAM map:
BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
BIOS-e820: [mem 0x0000000000100000-0x00000000befc1fff] usable
BIOS-e820: [mem 0x00000000befc2000-0x00000000bf6c1fff] reserved
BIOS-e820: [mem 0x00000000bf6c2000-0x00000000bf7c1fff] ACPI NVS
BIOS-e820: [mem 0x00000000bf7c2000-0x00000000bf7fefff] ACPI data
BIOS-e820: [mem 0x00000000bf7ff000-0x00000000bf7fffff] usable
BIOS-e820: [mem 0x00000000bf800000-0x00000000bfffffff] reserved
BIOS-e820: [mem 0x00000000e0000000-0x00000000efffffff] reserved
BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
BIOS-e820: [mem 0x00000000fed10000-0x00000000fed13fff] reserved
BIOS-e820: [mem 0x00000000fed19000-0x00000000fed19fff] reserved
BIOS-e820: [mem 0x00000000fed1b000-0x00000000fed1ffff] reserved
BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
BIOS-e820: [mem 0x00000000ffd00000-0x00000000ffffffff] reserved
BIOS-e820: [mem 0x0000000100000000-0x00000001fbffffff] usable
BIOS-e820: [mem 0x00000001fc000000-0x00000001ffffffff] reserved
BIOS-e820: [mem 0x0000000200000000-0x000000023bffffff] usable
NX (Execute Disable) protection: active
DMI 2.6 present.
No AGP bridge found
e820: last_pfn = 0x23c000 max_arch_pfn = 0x400000000
x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
e820: last_pfn = 0xbf800 max_arch_pfn = 0x400000000
init_memory_mapping: [mem 0x00000000-0xbf7fffff]
init_memory_mapping: [mem 0x100000000-0x23bffffff]
ACPI: RSDP 00000000000fddc0 00024 (v02 HPQOEM)
ACPI: XSDT 00000000bf7fe120 00094 (v01 HPQOEM SLIC-MPC 0000000F      01000013)
ACPI: FACP 00000000bf7fc000 000F4 (v03 HPQOEM 1521     0000000F HP   00000001)
ACPI: DSDT 00000000bf7da000 1C77F (v02 HPQOEM 1521     00000001 INTL 20060912)
ACPI: FACS 00000000bf760000 00040
ACPI: HPET 00000000bf7fb000 00038 (v01 HPQOEM 1521     00000001 HP   00000001)
ACPI: APIC 00000000bf7fa000 000BC (v01 HPQOEM 1521     00000001 HP   00000001)
ACPI: MCFG 00000000bf7f9000 0003C (v01 HPQOEM 1521     00000001 HP   00000001)
ACPI: TCPA 00000000bf7f7000 00032 (v02 HPQOEM 1521     00000000 HP   00000001)
ACPI: SSDT 00000000bf7d7000 00135 (v01 HPQOEM SataAhci 00001000 INTL 20060912)
ACPI: SSDT 00000000bf7d6000 00314 (v01 HPQOEM PtidDevc 00001000 INTL 20060912)
ACPI: SLIC 00000000bf7d5000 00176 (v01 HPQOEM SLIC-MPC 00000001 HP   00000001)
ACPI: SSDT 00000000bf7d1000 02576 (v01 HPQOEM NVIDIAGF 00000001 INTL 20060912)
ACPI: DMAR 00000000bf7d0000 00080 (v01 INTEL  CP_DALE  00000001 INTL 00000001)
ACPI: SSDT 00000000bf7cf000 00A10 (v01  PmRef    CpuPm 00003000 INTL 20060912)
ACPI: SSDT 00000000bf7ce000 00288 (v01  PmRef  Cpu0Tst 00003000 INTL 20060912)
ACPI: SSDT 00000000bf7cd000 00225 (v01  PmRef    ApTst 00003000 INTL 20060912)
ACPI: ASF! 00000000bf7f8000 000A0 (v32 HPQOEM 1521     00000001 HP   00000001)
Zone ranges:
  DMA      [mem 0x00010000-0x00ffffff]
  DMA32    [mem 0x01000000-0xffffffff]
  Normal   [mem 0x100000000-0x23bffffff]
Movable zone start for each node
Early memory node ranges
  node   0: [mem 0x00010000-0x0009efff]
  node   0: [mem 0x00100000-0xbefc1fff]
  node   0: [mem 0xbf7ff000-0xbf7fffff]
  node   0: [mem 0x100000000-0x1fbffffff]
  node   0: [mem 0x200000000-0x23bffffff]
ACPI: PM-Timer IO Port: 0x408
ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
ACPI: LAPIC (acpi_id[0x02] lapic_id[0x04] enabled)
ACPI: LAPIC (acpi_id[0x03] lapic_id[0x05] enabled)
ACPI: LAPIC (acpi_id[0x04] lapic_id[0x00] disabled)
ACPI: LAPIC (acpi_id[0x05] lapic_id[0x00] disabled)
ACPI: LAPIC (acpi_id[0x06] lapic_id[0x00] disabled)
ACPI: LAPIC (acpi_id[0x07] lapic_id[0x00] disabled)
ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x02] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x03] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x04] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x05] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x06] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x07] high edge lint[0x1])
ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0])
IOAPIC[0]: apic_id 1, version 32, address 0xfec00000, GSI 0-23
ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
Using ACPI (MADT) for SMP configuration information
ACPI: HPET id: 0x8086a201 base: 0xfed00000
SMP: Allowing 8 CPUs, 4 hotplug CPUs
e820: [mem 0xc0000000-0xdfffffff] available for PCI devices
setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:8 nr_node_ids:1
PERCPU: Embedded 27 pages/cpu @ffff88023bc00000 s78080 r8192 d24320 u262144
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 2023500
Kernel command line: root=/dev/sda5 rootfstype=ext4 pciehp_force=1 nouveau.modeset=1 nouveau.noaccel=1 netconsole=4444@10.11.1.234/eth0,4444@10.11.1.19/00:17:f2:c7:5f:06 drm.debug=15
PID hash table entries: 4096 (order: 3, 32768 bytes)
Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
__ex_table already sorted, skipping sort
Checking aperture...
No AGP bridge found
Memory: 8015340k/9371648k available (7704k kernel code, 1131192k absent, 225116k reserved, 5399k data, 540k init)
SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1
Preemptible hierarchical RCU implementation.
NR_IRQS:4352 nr_irqs:744 16
Extended CMOS year: 2000
Console: colour VGA+ 80x25
console [tty0] enabled
Fast TSC calibration using PIT
Detected 2660.491 MHz processor.
Calibrating delay loop (skipped), value calculated using timer frequency.. 5320.98 BogoMIPS (lpj=10641964)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 256
Initializing cgroup subsys blkio
CPU: Physical Processor ID: 0
CPU: Processor Core ID: 0
mce: CPU supports 9 MCE banks
CPU0: Thermal monitoring enabled (TM1)
using mwait in idle threads.
ACPI: Core revision 20120320
..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
CPU0: Intel(R) Core(TM) i7 CPU       M 620  @ 2.67GHz stepping 05
Performance Events: PEBS fmt1+, 16-deep LBR, Westmere events, Intel PMU driver.
CPUID marked event: 'bus cycles' unavailable
... version:                3
... bit width:              48
... generic registers:      4
... value mask:             0000ffffffffffff
... max period:             000000007fffffff
... fixed-purpose events:   3
... event mask:             000000070000000f
Booting Node   0, Processors  #1 #2 #3
Brought up 4 CPUs
Total of 4 processors activated (21283.92 BogoMIPS).
devtmpfs: initialized
PM: Registering ACPI NVS region [mem 0xbf6c2000-0xbf7c1fff] (1048576 bytes)
NET: Registered protocol family 16
ACPI FADT declares the system doesn't support PCIe ASPM, so disable it
ACPI: bus type pci registered
dca service started, version 1.12.1
PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0xe0000000-0xefffffff] (base 0xe0000000)
PCI: MMCONFIG at [mem 0xe0000000-0xefffffff] reserved in E820
PCI: Using configuration type 1 for base access
bio: create slab <bio-0> at 0
ACPI: Added _OSI(Module Device)
ACPI: Added _OSI(Processor Device)
ACPI: Added _OSI(3.0 _SCP Extensions)
ACPI: Added _OSI(Processor Aggregator Device)
[Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
ACPI: SSDT 00000000bf6bba18 0047D (v01  PmRef  Cpu0Ist 00003000 INTL 20060912)
ACPI: Dynamic OEM Table Load:
ACPI: SSDT           (null) 0047D (v01  PmRef  Cpu0Ist 00003000 INTL 20060912)
ACPI: SSDT 00000000bf6b9018 008AA (v01  PmRef  Cpu0Cst 00003001 INTL 20060912)
ACPI: Dynamic OEM Table Load:
ACPI: SSDT           (null) 008AA (v01  PmRef  Cpu0Cst 00003001 INTL 20060912)
ACPI: SSDT 00000000bf6baa98 00303 (v01  PmRef    ApIst 00003000 INTL 20060912)
ACPI: Dynamic OEM Table Load:
ACPI: SSDT           (null) 00303 (v01  PmRef    ApIst 00003000 INTL 20060912)
ACPI: SSDT 00000000bf6b8d98 00119 (v01  PmRef    ApCst 00003000 INTL 20060912)
ACPI: Dynamic OEM Table Load:
ACPI: SSDT           (null) 00119 (v01  PmRef    ApCst 00003000 INTL 20060912)
ACPI: Interpreter enabled
ACPI: (supports S0 S3 S5)
ACPI: Using IOAPIC for interrupt routing
ACPI: Power Resource [APPR] (off)
ACPI: Power Resource [LPP] (on)
ACPI: EC: GPE = 0x16, I/O: command/status = 0x66, data = 0x62
ACPI: No dock devices found.
PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-fe])
pci_root PNP0A08:00: host bridge window [io  0x0000-0x0cf7]
pci_root PNP0A08:00: host bridge window [io  0x0d00-0xffff]
pci_root PNP0A08:00: host bridge window [mem 0x000a0000-0x000bffff]
pci_root PNP0A08:00: host bridge window [mem 0xc0000000-0xdfffffff]
pci_root PNP0A08:00: host bridge window [mem 0xf0000000-0xfedfffff]
pci_root PNP0A08:00: host bridge window [mem 0xfee01000-0xffffffff]
PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7]
pci_bus 0000:00: root bus resource [io  0x0d00-0xffff]
pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff]
pci_bus 0000:00: root bus resource [mem 0xc0000000-0xdfffffff]
pci_bus 0000:00: root bus resource [mem 0xf0000000-0xfedfffff]
pci_bus 0000:00: root bus resource [mem 0xfee01000-0xffffffff]
pci 0000:00:01.0: PCI bridge to [bus 01-01]
pci 0000:00:1c.0: PCI bridge to [bus 02-02]
pci 0000:00:1c.1: PCI bridge to [bus 03-43]
pci 0000:00:1c.3: PCI bridge to [bus 44-44]
pci 0000:00:1c.7: PCI bridge to [bus 45-45]
pci 0000:46:06.0: proprietary Ricoh MMC controller disabled (via firewire function)
pci 0000:46:06.0: MMC cards are now supported by standard SDHCI controller
pci 0000:00:1e.0: PCI bridge to [bus 46-47] (subtractive decode)
pci_bus 0000:47: [bus 47-4a] partially hidden behind transparent bridge 0000:46 [bus 46-47]
 pci0000:00: Requesting ACPI _OSC control (0x1d)
 pci0000:00: ACPI _OSC control (0x1d) granted
ACPI: PCI Root Bridge [CPBG] (domain 0000 [bus ff])
PCI host bridge to bus 0000:ff
 pci0000:ff: Requesting ACPI _OSC control (0x1d)
 pci0000:ff: ACPI _OSC request failed (AE_NOT_FOUND), returned control mask: 0x1d
ACPI _OSC control for PCIe not granted, disabling ASPM
ACPI: PCI Interrupt Link [LNKA] (IRQs 1 3 4 5 6 7 *10 12 14 15)
ACPI: PCI Interrupt Link [LNKB] (IRQs 1 3 4 *5 6 7 11 12 14 15)
ACPI: PCI Interrupt Link [LNKC] (IRQs 1 3 4 5 6 7 10 12 14 15) *11
ACPI: PCI Interrupt Link [LNKD] (IRQs 1 3 4 5 6 7 11 12 14 15) *10
ACPI: PCI Interrupt Link [LNKE] (IRQs 1 3 4 5 6 7 *10 12 14 15)
ACPI: PCI Interrupt Link [LNKF] (IRQs 1 3 4 5 6 7 11 12 14 15) *10
ACPI: PCI Interrupt Link [LNKG] (IRQs 1 3 4 5 6 7 10 12 14 15) *0, disabled.
ACPI: PCI Interrupt Link [LNKH] (IRQs 1 3 4 5 6 7 11 12 14 15) *0, disabled.
vgaarb: device added: PCI:0000:01:00.0,decodes=io+mem,owns=io+mem,locks=none
vgaarb: loaded
vgaarb: bridge control possible 0000:01:00.0
SCSI subsystem initialized
ACPI: bus type usb registered
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Linux video capture interface: v2.00
wmi: Mapper loaded
Advanced Linux Sound Architecture Driver Version 1.0.25.
PCI: Using ACPI for IRQ routing
Bluetooth: Core ver 2.16
NET: Registered protocol family 31
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
cfg80211: Calling CRDA to update world regulatory domain
hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0, 0, 0, 0, 0, 0
hpet0: 8 comparators, 64-bit 14.318180 MHz counter
Switching to clocksource hpet
pnp: PnP ACPI init
ACPI: bus type pnp registered
system 00:01: [mem 0xfed1c000-0xfed1ffff] has been reserved
system 00:01: [mem 0xfed10000-0xfed13fff] has been reserved
system 00:01: [mem 0xfed1b000-0xfed1bfff] has been reserved
system 00:01: [mem 0xfed19000-0xfed19fff] has been reserved
system 00:01: [mem 0xd7600000-0xd7600fff] has been reserved
system 00:01: [mem 0xe0000000-0xefffffff] has been reserved
system 00:01: [mem 0xfed20000-0xfed3ffff] has been reserved
system 00:01: [mem 0xfed90000-0xfed93fff] has been reserved
system 00:01: [mem 0xfed45000-0xfed8ffff] has been reserved
system 00:01: [mem 0xfec00000-0xfec00fff] could not be reserved
system 00:07: [io  0x0200-0x027f] has been reserved
system 00:07: [io  0x1000-0x100f] has been reserved
system 00:07: [io  0xffff] has been reserved
system 00:07: [io  0xffff] has been reserved
system 00:07: [io  0x0400-0x047f] has been reserved
system 00:07: [io  0x0500-0x057f] has been reserved
system 00:07: [io  0xef80-0xef9f] has been reserved
pnp: PnP ACPI: found 14 devices
ACPI: ACPI bus type pnp unregistered
pci 0000:01:00.0: no compatible bridge window for [mem 0xfff80000-0xffffffff pref]
pci 0000:00:1e.0: BAR 15: assigned [mem 0xd8000000-0xdbffffff pref]
pci 0000:00:1c.1: BAR 15: assigned [mem 0xd7700000-0xd78fffff 64bit pref]
pci 0000:01:00.0: BAR 6: assigned [mem 0xd3080000-0xd30fffff pref]
pci 0000:00:01.0: PCI bridge to [bus 01-01]
pci 0000:00:01.0:   bridge window [io  0x5000-0x5fff]
pci 0000:00:01.0:   bridge window [mem 0xd2000000-0xd30fffff]
pci 0000:00:01.0:   bridge window [mem 0xc0000000-0xd1ffffff 64bit pref]
pci 0000:00:1c.0: PCI bridge to [bus 02-02]
pci 0000:00:1c.0:   bridge window [mem 0xd7400000-0xd74fffff]
pci 0000:00:1c.1: PCI bridge to [bus 03-43]
pci 0000:00:1c.1:   bridge window [io  0x3000-0x4fff]
pci 0000:00:1c.1:   bridge window [mem 0xd3400000-0xd73fffff]
pci 0000:00:1c.1:   bridge window [mem 0xd7700000-0xd78fffff 64bit pref]
pci 0000:00:1c.3: PCI bridge to [bus 44-44]
pci 0000:00:1c.3:   bridge window [mem 0xd3300000-0xd33fffff]
pci 0000:00:1c.7: PCI bridge to [bus 45-45]
pci 0000:00:1c.7:   bridge window [mem 0xd3200000-0xd32fffff]
pci 0000:46:06.4: BAR 15: assigned [mem 0xd8000000-0xdbffffff pref]
pci 0000:46:06.4: BAR 16: assigned [mem 0xdc000000-0xdfffffff]
pci 0000:46:06.4: BAR 13: assigned [io  0x2000-0x20ff]
pci 0000:46:06.4: BAR 14: assigned [io  0x2400-0x24ff]
pci 0000:46:06.4: CardBus bridge to [bus 47-4a]
pci 0000:46:06.4:   bridge window [io  0x2000-0x20ff]
pci 0000:46:06.4:   bridge window [io  0x2400-0x24ff]
pci 0000:46:06.4:   bridge window [mem 0xd8000000-0xdbffffff pref]
pci 0000:46:06.4:   bridge window [mem 0xdc000000-0xdfffffff]
pci 0000:00:1e.0: PCI bridge to [bus 46-47]
pci 0000:00:1e.0:   bridge window [io  0x2000-0x2fff]
pci 0000:00:1e.0:   bridge window [mem 0xd3100000-0xd31fffff]
pci 0000:00:1e.0:   bridge window [mem 0xd8000000-0xdbffffff pref]
NET: Registered protocol family 2
IP route cache hash table entries: 262144 (order: 9, 2097152 bytes)
TCP established hash table entries: 262144 (order: 10, 4194304 bytes)
TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
TCP: Hash tables configured (established 262144 bind 65536)
TCP: reno registered
UDP hash table entries: 4096 (order: 5, 131072 bytes)
UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes)
NET: Registered protocol family 1
PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
  #0: HDA Intel at 0xd7520000 irq 54
  #1: HDA NVidia at 0xd3000000 irq 17
EXT4-fs (sda5): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext4 filesystem) readonly on device 8:5.
devtmpfs: mounted
Freeing unused kernel memory: 540k freed
Write protecting the kernel read-only data: 12288k
Freeing unused kernel memory: 476k freed
Freeing unused kernel memory: 1052k freed
BUG: unable to handle kernel NULL pointer dereference at 0000000000000040
IP: [<ffffffffa00c4155>] nv50_display_vblank_crtc_handler+0x25/0xe0 [nouveau]
PGD 0 
Oops: 0000 [#1] PREEMPT SMP 
CPU 2 
Modules linked in: nouveau(+) ttm drm_kms_helper cfbcopyarea cfbimgblt cfbfillrect

Pid: 0, comm: swapper/2 Not tainted 3.5.0 #3 Hewlett-Packard HP EliteBook 8540w/1521
RIP: 0010:[<ffffffffa00c4155>]  [<ffffffffa00c4155>] nv50_display_vblank_crtc_handler+0x25/0xe0 [nouveau]
RSP: 0018:ffff88023bc83d88  EFLAGS: 00010096
RAX: ffff880229f80000 RBX: ffff880231dad800 RCX: 00000000000000ad
RDX: 00000000000000c7 RSI: 0000000000000000 RDI: ffff880231dad800
RBP: ffff88023bc83db8 R08: ffffffff81dcf1a0 R09: 0000000000000bb1
R10: 0000000000000bb0 R11: ffffffff81d8ecf8 R12: 0000000000000024
R13: 0000000000000000 R14: 0000000000000000 R15: ffff880231dad800
FS:  0000000000000000(0000) GS:ffff88023bc80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000040 CR3: 0000000001c0b000 CR4: 00000000000007e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper/2 (pid: 0, threadinfo ffff8802328d0000, task ffff8802328cace0)
Stack:
 ffff880231c72280 ffff880231dad800 0000000000000024 ffff880229f89450
 0000000000000000 0000000000000003 ffff88023bc83e38 ffffffffa00c43f2
 0000000000000246 0000000000000000 ffff880232908000 ffff880231c722a0
Call Trace:
 <IRQ> 
 [<ffffffffa00c43f2>] nv50_display_isr+0x1e2/0x3b0 [nouveau]
 [<ffffffffa003b2db>] nouveau_irq_handler+0x9b/0x130 [nouveau]
 [<ffffffff81095560>] ? __queue_work+0x4b0/0x4b0
 [<ffffffff810e8705>] handle_irq_event_percpu+0x75/0x250
 [<ffffffff810e8923>] handle_irq_event+0x43/0x70
 [<ffffffff810eb722>] handle_fasteoi_irq+0x72/0x110
 [<ffffffff81043ffd>] handle_irq+0x1d/0x30
 [<ffffffff81043c98>] do_IRQ+0x58/0xe0
 [<ffffffff8177a0e7>] common_interrupt+0x67/0x67
 <EOI> 
 [<ffffffff8130237f>] ? intel_idle+0xdf/0x140
 [<ffffffff8130235e>] ? intel_idle+0xbe/0x140
 [<ffffffff81511672>] cpuidle_enter+0x12/0x20
 [<ffffffff81511c6b>] cpuidle_idle_call+0xbb/0x2d0
 [<ffffffff8104b4cf>] cpu_idle+0x7f/0xc0
 [<ffffffff81771fb1>] start_secondary+0x1b5/0x1b9
Code: 90 90 90 90 90 90 55 48 89 e5 41 57 49 89 ff 41 56 41 55 41 89 f5 41 54 53 48 83 ec 08 48 8b 87 48 03 00 00 4c 8b b0 e8 00 00 00 <49> 8b 46 40 49 83 c6 40 4c 8d 60 f0 49 39 c6 49 8b 5c 24 10 0f 
RIP  [<ffffffffa00c4155>] nv50_display_vblank_crtc_handler+0x25/0xe0 [nouveau]
 RSP <ffff88023bc83d88>
CR2: 0000000000000040
---[ end trace 11acf71d7ca0415c ]---
Kernel panic - not syncing: Fatal exception in interrupt