Maybe this one is already known, but I did not find a post about it. So here it is.
Regards, Arend
========================================================================== [ 9.422018] usb 1-1.2: new high-speed USB device number 4 using ehci-pci [ 9.436177] [TTM] Zone kernel: Available graphics memory: 433698 kiB [ 9.442676] [TTM] Zone highmem: Available graphics memory: 1678052 kiB [ 9.449256] [TTM] Initializing pool allocator [ 9.455462] nouveau [ DRM] VRAM: 512 MiB [ 9.459851] nouveau [ DRM] GART: 512 MiB [ 9.464227] nouveau [ DRM] BIT BIOS found [ 9.468709] nouveau [ DRM] Bios version 70.18.53.00 [ 9.474040] nouveau [ DRM] TMDS table version 2.0 [ 9.479196] nouveau [ DRM] DCB version 4.0 [ 9.483746] nouveau [ DRM] DCB outp 00: 048003b6 0f200014 [ 9.489580] nouveau [ DRM] DCB outp 01: 02033300 00000000 [ 9.495431] nouveau [ DRM] DCB outp 02: 088223a6 0f220010 [ 9.501278] nouveau [ DRM] DCB outp 03: 08022362 00020010 [ 9.507124] nouveau [ DRM] DCB outp 04: 028113c6 0f220010 [ 9.512970] nouveau [ DRM] DCB outp 05: 02011382 00020010 [ 9.518804] nouveau [ DRM] DCB conn 00: 00002047 [ 9.523059] hub 1-1.2:1.0: USB hub found [ 9.523201] hub 1-1.2:1.0: 3 ports detected [ 9.532105] nouveau [ DRM] DCB conn 01: 00101146 [ 9.537360] nouveau [ DRM] DCB conn 02: 00410246 [ 9.542450] nouveau [ DRM] DCB conn 03: 00000300 [ 9.588499] [ 9.589986] ============================================= [ 9.595365] [ INFO: possible recursive locking detected ] [ 9.600745] 3.8.0-rc2-wl-testing-lockdep-00002-ga524cf0 #1 Not tainted [ 9.607248] --------------------------------------------- [ 9.612626] modprobe/163 is trying to acquire lock: [ 9.617486] (&subdev->mutex){+.+.+.}, at: [<f8929c12>] nv50_fb_vram_new+0x92/0x230 [nouveau] [ 9.626052] [ 9.626052] but task is already holding lock: [ 9.631865] (&subdev->mutex){+.+.+.}, at: [<f8936505>] nv50_disp_data_ctor+0x55/0xc0 [nouveau] [ 9.640593] [ 9.640593] other info that might help us debug this: [ 9.647096] Possible unsafe locking scenario: [ 9.647096] [ 9.652995] CPU0 [ 9.655430] ---- [ 9.657867] lock(&subdev->mutex); [ 9.661365] lock(&subdev->mutex); [ 9.664863] [ 9.664863] *** DEADLOCK *** [ 9.664863] [ 9.670762] May be due to missing lock nesting notation [ 9.670762] [ 9.677526] 4 locks held by modprobe/163: [ 9.681520] #0: (&__lockdep_no_validate__){......}, at: [<c1364f40>] __driver_attach+0x50/0xa0 [ 9.690341] #1: (&__lockdep_no_validate__){......}, at: [<c1364f4c>] __driver_attach+0x5c/0xa0 [ 9.699156] #2: (drm_global_mutex){+.+.+.}, at: [<f87814b8>] drm_get_pci_dev+0xa8/0x260 [drm] [ 9.707899] #3: (&subdev->mutex){+.+.+.}, at: [<f8936505>] nv50_disp_data_ctor+0x55/0xc0 [nouveau] [ 9.717075] [ 9.717075] stack backtrace: [ 9.721417] Pid: 163, comm: modprobe Not tainted 3.8.0-rc2-wl-testing-lockdep-00002-ga524cf0 #1 [ 9.730085] Call Trace: [ 9.732524] [<c1096603>] __lock_acquire+0x12f3/0x1780 [ 9.737644] [<c10927a0>] ? noop_count+0x10/0x10 [ 9.742246] [<c1094b0b>] ? check_usage+0x6b/0x410 [ 9.747021] [<c1096f94>] lock_acquire+0x84/0x120 [ 9.751721] [<f8929c12>] ? nv50_fb_vram_new+0x92/0x230 [nouveau] [ 9.757797] [<c1514264>] mutex_lock_nested+0x64/0x2e0 [ 9.762929] [<f8929c12>] ? nv50_fb_vram_new+0x92/0x230 [nouveau] [ 9.769012] [<f8929bde>] ? nv50_fb_vram_new+0x5e/0x230 [nouveau] [ 9.775096] [<f8929c12>] nv50_fb_vram_new+0x92/0x230 [nouveau] [ 9.781008] [<f892df5e>] nv50_instobj_ctor+0xae/0xf0 [nouveau] [ 9.786918] [<f8913f3b>] nouveau_object_ctor+0x3b/0xe0 [nouveau] [ 9.793001] [<f892dcdd>] nv50_instmem_alloc+0x2d/0x40 [nouveau] [ 9.798996] [<f8912922>] nouveau_gpuobj_create_+0x232/0x2b0 [nouveau] [ 9.805501] [<c15172b6>] ? _raw_spin_unlock_irqrestore+0x36/0x70 [ 9.811574] [<c1097834>] ? trace_hardirqs_on_caller+0xf4/0x180 [ 9.817483] [<f8911480>] nouveau_engctx_create_+0x220/0x260 [nouveau] [ 9.824002] [<f893655f>] nv50_disp_data_ctor+0xaf/0xc0 [nouveau] [ 9.830086] [<f8913f3b>] nouveau_object_ctor+0x3b/0xe0 [nouveau] [ 9.836168] [<f89147e9>] nouveau_object_new+0xe9/0x220 [nouveau] [ 9.842258] [<f89a455c>] nv50_display_create+0x18c/0x850 [nouveau] [ 9.848505] [<c10555fa>] ? __cancel_work_timer+0x5a/0xb0 [ 9.853884] [<c1097834>] ? trace_hardirqs_on_caller+0xf4/0x180 [ 9.859783] [<c105560a>] ? __cancel_work_timer+0x6a/0xb0 [ 9.865181] [<f898d3f5>] nouveau_display_create+0x415/0x6a0 [nouveau] [ 9.871700] [<f897e16b>] nouveau_drm_load+0x28b/0x5d0 [nouveau] [ 9.877688] [<c1362bc7>] ? device_register+0x17/0x20 [ 9.882727] [<f8782bfa>] ? drm_sysfs_device_add+0x7a/0xa0 [drm] [ 9.888719] [<f877f920>] ? drm_get_minor+0x220/0x2b0 [drm] [ 9.894279] [<f878155b>] drm_get_pci_dev+0x14b/0x260 [drm] [ 9.899833] [<c12c81c7>] ? __pci_set_master+0x27/0x80 [ 9.904969] [<f897db3e>] nouveau_drm_probe+0x20e/0x250 [nouveau] [ 9.911042] [<c12cd6b3>] pci_device_probe+0x83/0xc0 [ 9.915989] [<c1364d64>] driver_probe_device+0x64/0x1f0 [ 9.921282] [<c1364f89>] __driver_attach+0x99/0xa0 [ 9.926143] [<c1364ef0>] ? driver_probe_device+0x1f0/0x1f0 [ 9.931696] [<c13635c2>] bus_for_each_dev+0x42/0x70 [ 9.936644] [<c1364931>] driver_attach+0x21/0x30 [ 9.941333] [<c1364ef0>] ? driver_probe_device+0x1f0/0x1f0 [ 9.946885] [<c1364557>] bus_add_driver+0x187/0x280 [ 9.951831] [<c12cc780>] ? pci_dev_put+0x20/0x20 [ 9.956518] [<c12cc780>] ? pci_dev_put+0x20/0x20 [ 9.961206] [<c136541a>] driver_register+0x6a/0x130 [ 9.966153] [<c12b8142>] ? __raw_spin_lock_init+0x32/0x60 [ 9.971618] [<c12cc90a>] __pci_register_driver+0x4a/0x50 [ 9.977005] [<f878176d>] drm_pci_init+0xfd/0x110 [drm] [ 9.982219] [<f89e0048>] nouveau_drm_init+0x48/0x4a [nouveau] [ 9.988033] [<c1001144>] do_one_initcall+0x34/0x170 [ 9.992980] [<f89e0000>] ? 0xf89dffff [ 9.996717] [<c10a2013>] load_module+0x1a73/0x22a0 [ 10.001579] [<c10a28c6>] sys_init_module+0x86/0xa0 [ 10.006440] [<c151ebad>] sysenter_do_call+0x12/0x38 [ 10.011744] usb 1-1.4: new high-speed USB device number 5 using ehci-pci [ 10.012623] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010). [ 10.012623] [drm] No driver support for vblank timestamp query. [ 10.012625] nouveau [ DRM] ACPI backlight interface available, not registering our own [ 10.208606] usb 2-1.7: new full-speed USB device number 3 using ehci-pci [ 10.233173] nouveau [ DRM] 3 available performance level(s) [ 10.239278] nouveau [ DRM] 0: core 135MHz shader 270MHz memory 135MHz voltage 850mV [ 10.247417] nouveau [ DRM] 1: core 405MHz shader 810MHz memory 405MHz voltage 850mV [ 10.255553] nouveau [ DRM] 3: core 606MHz shader 1468MHz memory 790MHz voltage 1000mV [ 10.263865] nouveau [ DRM] c: core 405MHz shader 810MHz memory 405MHz voltage 1000mV [ 10.314402] nouveau [ DRM] MM: using COPY for buffer copies [ 10.380308] usb 2-1.8: new full-speed USB device number 4 using ehci-pci [ 10.503748] usb 2-1.8: config 0 descriptor?? [ 10.568285] nouveau [ DRM] allocated 1920x1080 fb: 0x70000, bo f717be00 [ 10.575405] fbcon: nouveaufb (fb0) is primary device [ 10.837296] Console: switching to colour frame buffer device 180x56 [ 10.844686] nouveau 0000:01:00.0: fb0: nouveaufb frame buffer device [ 10.851053] nouveau 0000:01:00.0: registered panic notifier [ 10.856646] [drm] Initialized nouveau 1.1.0 20120801 for 0000:01:00.0 on minor 0 Begin: Loading essential drivers ... done. Begin: Running /scripts/init-premount ... done.