While using chrome, I got the following. It was able to render the bug to the screen, so at least something was working (and it also made it to my logs).
[223614.867297] BUG: unable to handle kernel paging request at ffffc90013a00000 [223614.867372] IP: [<ffffffff812eaf98>] iowrite32+0x12/0x33 [223614.867427] PGD 1a880e067 PUD 1a880f067 PMD 1a2ccf067 PTE 0 [223614.867488] Oops: 0002 [#1] SMP [223614.867523] Modules linked in: it87 hwmon_vid bridge stp llc usb_storage nouveau fbcon cfbfillrect cfbimgblt cfbcopyarea bitblit i2c_algo_bit mxm_wmi softcursor font ttm btusb bluetooth drm_kms_helper crc16 drm backlight fb fbdev wmi [223614.867781] CPU 0 [223614.867804] Pid: 18237, comm: chrome Not tainted 3.7.9-gentoo #1 Gigabyte Technology Co., Ltd. EX58-UD3R/EX58-UD3R [223614.867892] RIP: 0010:[<ffffffff812eaf98>] [<ffffffff812eaf98>] iowrite32+0x12/0x33 [223614.867963] RSP: 0018:ffff8800878eb9a8 EFLAGS: 00010292 [223614.868010] RAX: 0000000000000000 RBX: ffff8801252b5180 RCX: ffff880071b26d20 [223614.868071] RDX: 0000000000000000 RSI: ffffc90013a00000 RDI: ffffc90013a00000 [223614.868131] RBP: ffff8800878eb9a8 R08: 0000000000000001 R09: 000000000000fffe [223614.868192] R10: 0000000000000001 R11: ffff8801a3d87f00 R12: 0000000000000000 [223614.868252] R13: 0000000000005004 R14: ffff8801a7395b00 R15: 000000003dde2000 [223614.868314] FS: 00007f34c3bed900(0000) GS:ffff8801afc00000(0000) knlGS:0000000000000000 [223614.868382] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [223614.868432] CR2: ffffc90013a00000 CR3: 0000000096e04000 CR4: 00000000000007f0 [223614.868493] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [223614.868554] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [223614.868615] Process chrome (pid: 18237, threadinfo ffff8800878ea000, task ffff880171f8b4f0) [223614.868684] Stack: [223614.868704] ffff8800878eb9b8 ffffffffa014638e ffff8800878eb9c8 ffffffffa0143939 [223614.868779] ffff8800878eba38 ffffffffa0143bff 00000000000000d0 ffffffffa01d67e0 [223614.868853] ffff8801a3d87f00 0000000000000000 ffff880071b26d20 0000000000000000 [223614.868927] Call Trace: [223614.868969] [<ffffffffa014638e>] nouveau_barobj_wr32+0x16/0x18 [nouveau] [223614.869039] [<ffffffffa0143939>] _nouveau_gpuobj_wr32+0x26/0x28 [nouveau] [223614.869108] [<ffffffffa0143bff>] nouveau_gpuobj_create_+0x1fe/0x243 [nouveau] [223614.869181] [<ffffffffa0143c81>] _nouveau_gpuobj_ctor+0x3d/0x4b [nouveau] [223614.869252] [<ffffffffa0144fb3>] nouveau_object_ctor+0x2b/0x9f [nouveau] [223614.869322] [<ffffffffa0143cdd>] nouveau_gpuobj_new+0x4e/0x50 [nouveau] [223614.869401] [<ffffffffa015c570>] nouveau_vm_get+0x161/0x26c [nouveau] [223614.869488] [<ffffffffa019c26c>] nouveau_bo_vma_add+0x43/0xc2 [nouveau] [223614.869574] [<ffffffffa0197e4e>] nouveau_channel_prep+0x156/0x26c [nouveau] [223614.869664] [<ffffffffa0197f9d>] nouveau_channel_new+0x39/0x570 [nouveau] [223614.869753] [<ffffffffa019df6e>] ? kzalloc.constprop.2+0xe/0x10 [nouveau] [223614.869842] [<ffffffffa019e459>] nouveau_abi16_ioctl_channel_alloc+0x1b4/0x2f4 [nouveau] [223614.869915] [<ffffffff8108e607>] ? should_resched+0x9/0x28 [223614.869966] [<ffffffff8169f1e7>] ? _cond_resched+0xe/0x22 [223614.870024] [<ffffffffa00237dd>] drm_ioctl+0x2d7/0x39e [drm] [223614.870105] [<ffffffffa019e2a5>] ? nouveau_abi16_ioctl_setparam+0x10/0x10 [nouveau] [223614.870173] [<ffffffff814f55a4>] ? fput_light+0xd/0xf [223614.870220] [<ffffffff814f8498>] ? sys_recvfrom+0xe1/0xf7 [223614.870270] [<ffffffff8114578e>] do_vfs_ioctl+0x452/0x493 [223614.870320] [<ffffffff8114d3bb>] ? fget_light+0x69/0x80 [223614.870368] [<ffffffff8113948a>] ? fput+0x18/0xb6 [223614.870412] [<ffffffff8114581b>] sys_ioctl+0x4c/0x71 [223614.870460] [<ffffffff816a6a9d>] system_call_fastpath+0x1a/0x1f [223614.870511] Code: eb 15 48 81 fe 00 00 01 00 77 0c 48 c7 c6 27 ed a4 81 e8 9c ff ff ff 5d c3 55 48 81 fe ff ff 03 00 89 f8 48 89 e5 48 89 f7 76 04 <89> 06 eb 1b 48 81 fe 00 00 01 00 76 06 0f b7 d6 ef eb 0c 48 c7
(gdb) disassemble iowrite32 Dump of assembler code for function iowrite32: 0xffffffff812eaf86 <+0>: push %rbp 0xffffffff812eaf87 <+1>: cmp $0x3ffff,%rsi 0xffffffff812eaf8e <+8>: mov %edi,%eax 0xffffffff812eaf90 <+10>: mov %rsp,%rbp 0xffffffff812eaf93 <+13>: mov %rsi,%rdi 0xffffffff812eaf96 <+16>: jbe 0xffffffff812eaf9c <iowrite32+22> 0xffffffff812eaf98 <+18>: mov %eax,(%rsi) <--- faulting instruction 0xffffffff812eaf9a <+20>: jmp 0xffffffff812eafb7 <iowrite32+49> 0xffffffff812eaf9c <+22>: cmp $0x10000,%rsi 0xffffffff812eafa3 <+29>: jbe 0xffffffff812eafab <iowrite32+37> 0xffffffff812eafa5 <+31>: movzwl %si,%edx 0xffffffff812eafa8 <+34>: out %eax,(%dx) 0xffffffff812eafa9 <+35>: jmp 0xffffffff812eafb7 <iowrite32+49> 0xffffffff812eafab <+37>: mov $0xffffffff81a70d6c,%rsi 0xffffffff812eafb2 <+44>: callq 0xffffffff812eaf20 <bad_io_access> 0xffffffff812eafb7 <+49>: pop %rbp 0xffffffff812eafb8 <+50>: retq
I have the following hardware: 02:00.0 VGA compatible controller [0300]: NVIDIA Corporation G96 [GeForce 9500 GT] [10de:0640] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Device [196e:0643] 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 16 Region 0: Memory at f8000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at d0000000 (64-bit, prefetchable) [size=256M] Region 3: Memory at f6000000 (64-bit, non-prefetchable) [size=32M] Region 5: I/O ports at ef00 [size=128] [virtual] Expansion ROM at f9000000 [disabled] [size=512K] Capabilities: [60] Power Management version 3 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: 0000000000000000 Data: 0000 Capabilities: [78] Express (v1) Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <512ns, L1 <4us ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset- 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, Latency L0 <512ns, L1 <1us ClockPM- Surprise- LLActRep- BwNot- LnkCtl: ASPM Disabled; RCB 128 bytes Disabled- Retrain- CommClk+ ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt- LnkSta: Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- Capabilities: [b4] Vendor Specific Information: Len=14 <?> 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=ff 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
Note sure what else would be useful... just throwing in some things that I think could be relevant, from my currently running system:
cat /proc/mtrr reg00: base=0x000000000 ( 0MB), size= 4096MB, count=1: write-back reg01: base=0x0e0000000 ( 3584MB), size= 512MB, count=1: uncachable reg02: base=0x0d0000000 ( 3328MB), size= 256MB, count=1: uncachable reg03: base=0x100000000 ( 4096MB), size= 4096MB, count=1: write-back reg04: base=0x1c0000000 ( 7168MB), size= 1024MB, count=1: uncachable reg05: base=0x1b0000000 ( 6912MB), size= 256MB, count=1: uncachable
[ 4.055915] nouveau [ DEVICE][0000:02:00.0] BOOT0 : 0x096000c1 [ 4.055918] nouveau [ DEVICE][0000:02:00.0] Chipset: G96 (NV96) [ 4.055920] nouveau [ DEVICE][0000:02:00.0] Family : NV50 [ 4.056926] nouveau [ VBIOS][0000:02:00.0] checking PRAMIN for image... [ 4.115127] nouveau [ VBIOS][0000:02:00.0] ... appears to be valid [ 4.115130] nouveau [ VBIOS][0000:02:00.0] using image from PRAMIN [ 4.115282] nouveau [ VBIOS][0000:02:00.0] BIT signature found [ 4.115284] nouveau [ VBIOS][0000:02:00.0] version 62.94.2a.00 [ 4.135865] nouveau [ MXM][0000:02:00.0] no VBIOS data, nothing to do [ 4.135886] nouveau [ PFB][0000:02:00.0] RAM type: DDR2 [ 4.135890] nouveau [ PFB][0000:02:00.0] RAM size: 1024 MiB [ 4.160519] [TTM] Zone kernel: Available graphics memory: 3050224 kiB [ 4.160521] [TTM] Zone dma32: Available graphics memory: 2097152 kiB [ 4.160523] [TTM] Initializing pool allocator [ 4.160526] [TTM] Initializing DMA pool allocator [ 4.160538] mtrr: type mismatch for d0000000,10000000 old: write-back new: write-combining [ 4.160540] nouveau [ DRM] VRAM: 1024 MiB [ 4.160542] nouveau [ DRM] GART: 512 MiB [ 4.160545] nouveau [ DRM] BIT BIOS found [ 4.160547] nouveau [ DRM] Bios version 62.94.2a.00 [ 4.160550] nouveau [ DRM] TMDS table version 2.0 [ 4.160551] nouveau [ DRM] DCB version 4.0 [ 4.160554] nouveau [ DRM] DCB outp 00: 02000300 00000028 [ 4.160556] nouveau [ DRM] DCB outp 01: 01000302 00020030 [ 4.160557] nouveau [ DRM] DCB outp 02: 04011310 00000028 [ 4.160559] nouveau [ DRM] DCB outp 03: 02011312 00020030 [ 4.160561] nouveau [ DRM] DCB conn 00: 00001030 [ 4.160563] nouveau [ DRM] DCB conn 01: 00002130 [ 4.201147] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 4.201150] [drm] No driver support for vblank timestamp query. [ 4.228875] nouveau [ DRM] 1 available performance level(s) [ 4.228880] nouveau [ DRM] 3: core 550MHz shader 1375MHz memory 400MHz fanspeed 100% [ 4.228884] nouveau [ DRM] c: core 400MHz shader 800MHz memory 499MHz fanspeed 100% [ 4.523097] nouveau [ DRM] MM: using CRYPT for buffer copies [ 4.619088] nouveau [ DRM] allocated 1920x1200 fb: 0x70000, bo ffff8801a734b800 [ 4.619160] fbcon: nouveaufb (fb0) is primary device [ 4.643874] Console: switching to colour frame buffer device 240x75 [ 4.646756] fb0: nouveaufb frame buffer device [ 4.646759] drm: registered panic notifier [ 4.646775] [drm] Initialized nouveau 1.1.0 20120801 for 0000:02:00.0 on minor 0
[IP-] [ ] www-client/chromium-25.0.1364.97:0 [I-O] [ ] media-libs/mesa-9.0.1:0 [IP-] [ ] x11-drivers/xf86-video-nouveau-1.0.4:0
Let me know if there's anything else that would be useful. This has only happened once so far. FWIW I run chrome with --ignore-gpu-blacklist.