I see this right after modprobe nouveau
[ 893.765750] wmi: Mapper loaded [ 893.882484] ACPI: PCI Interrupt Link [APC8] enabled at IRQ 16 [ 893.897628] nouveau [ DEVICE][0000:02:00.0] BOOT0 : 0x086100a2 [ 893.897684] nouveau [ DEVICE][0000:02:00.0] Chipset: G86 (NV86) [ 893.897733] nouveau [ DEVICE][0000:02:00.0] Family : NV50 [ 893.903637] nouveau [ VBIOS][0000:02:00.0] checking PRAMIN for image... [ 893.967500] nouveau [ VBIOS][0000:02:00.0] ... appears to be valid [ 893.967549] nouveau [ VBIOS][0000:02:00.0] using image from PRAMIN [ 893.967972] nouveau [ VBIOS][0000:02:00.0] BIT signature found [ 893.968429] nouveau [ VBIOS][0000:02:00.0] version 60.86.34.00.13 [ 894.004418] nouveau [ PFB][0000:02:00.0] RAM type: DDR2 [ 894.004460] nouveau [ PFB][0000:02:00.0] RAM size: 256 MiB [ 894.004497] nouveau [ PFB][0000:02:00.0] ZCOMP: 1292 tags [ 894.032167] nouveau [ PTHERM][0000:02:00.0] FAN control: PWM [ 894.032213] nouveau [ PTHERM][0000:02:00.0] Thermal management: disabled [ 894.032313] nouveau [ PTHERM][0000:02:00.0] Programmed thresholds [ 90(3), 95(3), 125(2), 130(10) ] [ 894.033316] [TTM] Zone kernel: Available graphics memory: 954266 kiB [ 894.033360] [TTM] Initializing pool allocator [ 894.033469] [TTM] Initializing DMA pool allocator [ 894.034451] nouveau [ DRM] VRAM: 256 MiB [ 894.034551] nouveau [ DRM] GART: 512 MiB [ 894.034643] nouveau [ DRM] TMDS table version 2.0 [ 894.034736] nouveau [ DRM] DCB version 4.0 [ 894.034826] nouveau [ DRM] DCB outp 00: 02000300 00000028 [ 894.034916] nouveau [ DRM] DCB outp 01: 01000302 00100030 [ 894.035031] nouveau [ DRM] DCB outp 02: 04011320 00000028 [ 894.035127] nouveau [ DRM] DCB outp 03: 010223f1 00c0c080 [ 894.035222] nouveau [ DRM] DCB conn 00: 1030 [ 894.035341] nouveau [ DRM] DCB conn 01: 0100 [ 894.035458] nouveau [ DRM] DCB conn 02: 0210 [ 894.035576] nouveau [ DRM] DCB conn 03: 0211 [ 894.035694] nouveau [ DRM] DCB conn 04: 0213 [ 894.036070] nouveau E[ PTHERM][0000:02:00.0] unhandled intr 0x000000e1 [ 894.048895] nouveau W[ DRM] failed to create encoder 0/1/0: -19 [ 894.049109] nouveau W[ DRM] TV-1 has no encoders, removing [ 894.050184] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 894.050275] [drm] No driver support for vblank timestamp query. [ 894.050772] nouveau [ DRM] 1 available performance level(s) [ 894.050864] nouveau [ DRM] 0: core 500MHz shader 1400MHz memory 400MHz fanspeed 100% [ 894.051023] nouveau [ DRM] c: core 459MHz shader 918MHz memory 399MHz voltage 1320mV [ 894.327037] nouveau [ DRM] MM: using CRYPT for buffer copies [ 894.368364] nouveau [ DRM] allocated 1600x1200 fb: 0x60000, bo ffff88007a0459c8 [ 894.373961] fbcon: nouveaufb (fb0) is primary device [ 894.379252] [ 894.379254] ============================================= [ 894.379255] [ INFO: possible recursive locking detected ] [ 894.379260] 3.9.0-rc2-zurg-00195-gab5d113 #23 Not tainted [ 894.379261] --------------------------------------------- [ 894.379263] modprobe/4180 is trying to acquire lock: [ 894.379364] (&dmac->lock){+.+...}, at: [<ffffffffa0339aa9>] evo_wait+0x49/0xf0 [nouveau] [ 894.379366] [ 894.379366] but task is already holding lock: [ 894.379425] (&dmac->lock){+.+...}, at: [<ffffffffa0339aa9>] evo_wait+0x49/0xf0 [nouveau] [ 894.379426] [ 894.379426] other info that might help us debug this: [ 894.379428] Possible unsafe locking scenario: [ 894.379428] [ 894.379429] CPU0 [ 894.379430] ---- [ 894.379433] lock(&dmac->lock); [ 894.379437] lock(&dmac->lock); [ 894.379438] [ 894.379438] *** DEADLOCK *** [ 894.379438] [ 894.379439] May be due to missing lock nesting notation [ 894.379439] [ 894.379442] 10 locks held by modprobe/4180: [ 894.379457] #0: (&__lockdep_no_validate__){......}, at: [<ffffffff8140c09b>] __driver_attach+0x5b/0xb0 [ 894.379468] #1: (&__lockdep_no_validate__){......}, at: [<ffffffff8140c0a9>] __driver_attach+0x69/0xb0 [ 894.379479] #2: (drm_global_mutex){+.+.+.}, at: [<ffffffff813f1be6>] drm_get_pci_dev+0xc6/0x2d0 [ 894.379490] #3: (registration_lock){+.+.+.}, at: [<ffffffff8134b605>] register_framebuffer+0x25/0x300 [ 894.379499] #4: (&fb_info->lock){+.+.+.}, at: [<ffffffff81349ab6>] lock_fb_info+0x26/0x60 [ 894.379509] #5: (console_lock){+.+.+.}, at: [<ffffffff8134b798>] register_framebuffer+0x1b8/0x300 [ 894.379520] #6: ((fb_notifier_list).rwsem){.+.+.+}, at: [<ffffffff810786b2>] __blocking_notifier_call_chain+0x42/0x80 [ 894.379531] #7: (&dev->mode_config.mutex){+.+.+.}, at: [<ffffffff813f58da>] drm_modeset_lock_all+0x2a/0x70 [ 894.379540] #8: (&crtc->mutex){+.+.+.}, at: [<ffffffff813f5904>] drm_modeset_lock_all+0x54/0x70 [ 894.379601] #9: (&dmac->lock){+.+...}, at: [<ffffffffa0339aa9>] evo_wait+0x49/0xf0 [nouveau] [ 894.379602] [ 894.379602] stack backtrace: [ 894.379606] Pid: 4180, comm: modprobe Not tainted 3.9.0-rc2-zurg-00195-gab5d113 #23 [ 894.379607] Call Trace: [ 894.379615] [<ffffffff8109b049>] __lock_acquire+0x6c9/0x1b00 [ 894.379621] [<ffffffff8109d2bb>] ? mark_held_locks+0x9b/0x100 [ 894.379626] [<ffffffff8109c9e5>] lock_acquire+0x85/0x120 [ 894.379682] [<ffffffffa0339aa9>] ? evo_wait+0x49/0xf0 [nouveau] [ 894.379691] [<ffffffff8171ee82>] ? mutex_lock_nested+0x292/0x330 [ 894.379696] [<ffffffff8171ec5e>] mutex_lock_nested+0x6e/0x330 [ 894.379752] [<ffffffffa0339aa9>] ? evo_wait+0x49/0xf0 [nouveau] [ 894.379756] [<ffffffff8109d2bb>] ? mark_held_locks+0x9b/0x100 [ 894.379812] [<ffffffffa0339aa9>] evo_wait+0x49/0xf0 [nouveau] [ 894.379868] [<ffffffffa033c543>] nv50_display_flip_next+0x713/0x7a0 [nouveau] [ 894.379874] [<ffffffff8171f07e>] ? mutex_unlock+0xe/0x10 [ 894.379930] [<ffffffffa0339b87>] ? evo_kick+0x37/0x40 [nouveau] [ 894.379985] [<ffffffffa033c7ce>] nv50_crtc_commit+0x10e/0x230 [nouveau] [ 894.379997] [<ffffffffa027d0f5>] drm_crtc_helper_set_mode+0x335/0x4c0 [drm_kms_helper] [ 894.380008] [<ffffffffa027e4ce>] drm_crtc_helper_set_config+0xa4e/0xb70 [drm_kms_helper] [ 894.380013] [<ffffffff813f6a41>] drm_mode_set_config_internal+0x31/0x70 [ 894.380013] [<ffffffffa027c621>] drm_fb_helper_set_par+0x71/0xf0 [drm_kms_helper] [ 894.380013] [<ffffffff81356e34>] fbcon_init+0x514/0x5a0 [ 894.380013] [<ffffffff813c136c>] visual_init+0xbc/0x120 [ 894.380013] [<ffffffff813c3a23>] do_bind_con_driver+0x163/0x320 [ 894.380013] [<ffffffff813c3cb1>] do_take_over_console+0x61/0x70 [ 894.380013] [<ffffffff81355353>] do_fbcon_takeover+0x63/0xc0 [ 894.380013] [<ffffffff81358f15>] fbcon_event_notify+0x715/0x820 [ 894.380013] [<ffffffff8172614d>] notifier_call_chain+0x4d/0x70 [ 894.380013] [<ffffffff810786c8>] __blocking_notifier_call_chain+0x58/0x80 [ 894.380013] [<ffffffff81078706>] blocking_notifier_call_chain+0x16/0x20 [ 894.380013] [<ffffffff813495bb>] fb_notifier_call_chain+0x1b/0x20 [ 894.380013] [<ffffffff8134b7a8>] register_framebuffer+0x1c8/0x300 [ 894.380013] [<ffffffffa027c351>] drm_fb_helper_initial_config+0x371/0x520 [drm_kms_helper] [ 894.380013] [<ffffffffa027b487>] ? drm_fb_helper_single_add_all_connectors+0x47/0xf0 [drm_kms_helper] [ 894.380013] [<ffffffffa027b487>] ? drm_fb_helper_single_add_all_connectors+0x47/0xf0 [drm_kms_helper] [ 894.380013] [<ffffffff8112ad03>] ? kmem_cache_alloc_trace+0x163/0x180 [ 894.380013] [<ffffffffa03236de>] nouveau_fbcon_init+0x10e/0x160 [nouveau] [ 894.380013] [<ffffffffa0313eea>] nouveau_drm_load+0x40a/0x5d0 [nouveau] [ 894.380013] [<ffffffff8140915e>] ? device_register+0x1e/0x30 [ 894.380013] [<ffffffff813f3376>] ? drm_sysfs_device_add+0x86/0xb0 [ 894.380013] [<ffffffff813f1ca6>] drm_get_pci_dev+0x186/0x2d0 [ 894.380013] [<ffffffffa031431a>] nouveau_drm_probe+0x26a/0x2c0 [nouveau] [ 894.380013] [<ffffffff8132e76c>] pci_device_probe+0x9c/0xe0 [ 894.380013] [<ffffffff8140bd3b>] driver_probe_device+0x8b/0x390 [ 894.380013] [<ffffffff8140c0eb>] __driver_attach+0xab/0xb0 [ 894.380013] [<ffffffff8140c040>] ? driver_probe_device+0x390/0x390 [ 894.380013] [<ffffffff81409cad>] bus_for_each_dev+0x5d/0xa0 [ 894.380013] [<ffffffff8140b69e>] driver_attach+0x1e/0x20 [ 894.380013] [<ffffffff8140b231>] bus_add_driver+0x121/0x2b0 [ 894.380013] [<ffffffffa038d000>] ? 0xffffffffa038cfff [ 894.380013] [<ffffffff8140c7d7>] driver_register+0x77/0x170 [ 894.380013] [<ffffffffa038d000>] ? 0xffffffffa038cfff [ 894.380013] [<ffffffff8132d8d4>] __pci_register_driver+0x64/0x70 [ 894.380013] [<ffffffff813f1f05>] drm_pci_init+0x115/0x130 [ 894.380013] [<ffffffffa038d000>] ? 0xffffffffa038cfff [ 894.380013] [<ffffffffa038d000>] ? 0xffffffffa038cfff [ 894.380013] [<ffffffffa038d04d>] nouveau_drm_init+0x4d/0x4f [nouveau] [ 894.380013] [<ffffffff81000312>] do_one_initcall+0x122/0x170 [ 894.380013] [<ffffffff810a92fd>] load_module+0x1b5d/0x26e0 [ 894.380013] [<ffffffff81322b80>] ? ddebug_proc_open+0xe0/0xe0 [ 894.380013] [<ffffffff8172245c>] ? retint_restore_args+0xe/0xe [ 894.380013] [<ffffffff810a9f2e>] sys_init_module+0xae/0x110 [ 894.380013] [<ffffffff8172a942>] system_call_fastpath+0x16/0x1b [ 894.435597] Console: switching to colour frame buffer device 200x75 [ 894.513780] nouveau 0000:02:00.0: fb0: nouveaufb frame buffer device [ 894.516082] nouveau 0000:02:00.0: registered panic notifier [ 894.517288] [drm] Initialized nouveau 1.1.0 20120801 for 0000:02:00.0 on minor 0