Lots of i915/drm spew on 3.4

On this hardware:

00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)

I get this every boot with Linus current tree (up to af56e0aa35f3ae2a4c1a6d1000702df1dd78cb76)

[    8.046291] udevadm used greatest stack depth: 4952 bytes left
[    8.153209] [drm] Initialized drm 1.1.0 20060810
[    8.491107] i915 0000:00:02.0: setting latency timer to 64
[    8.495118] console_init used greatest stack depth: 4784 bytes left
[    8.751664] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[    8.751756] [drm] Driver supports precise vblank timestamp query.
[    8.754836] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    8.992409] ------------[ cut here ]------------
[    8.992519] WARNING: at drivers/gpu/drm/drm_crtc.c:2886 drm_object_attach_property+0x4d/0x50 [drm]()
[    8.992634] Hardware name:         
[    8.992702] Failed to attach object property (type: 0xc0c0c0c0). Please increase DRM_OBJECT_MAX_PROPERTY by 1 for each time you see this message on the same object type.
[    8.992877] Modules linked in: i915(+) video i2c_algo_bit drm_kms_helper drm i2c_core
[    8.992989] Pid: 126, comm: udevd Not tainted 3.4.0+ #3
[    8.993711] Call Trace:
[    8.993790]  [<ffffffff8106084f>] warn_slowpath_common+0x7f/0xc0
[    8.993872]  [<ffffffff81060946>] warn_slowpath_fmt+0x46/0x50
[    8.993971]  [<ffffffffa00221dd>] drm_object_attach_property+0x4d/0x50 [drm]
[    8.994113]  [<ffffffffa00221f5>] drm_connector_attach_property+0x15/0x20 [drm]
[    8.994270]  [<ffffffffa00a8f34>] intel_sdvo_create_enhance_property+0xde4/0xe20 [i915]
[    8.994404]  [<ffffffffa002329a>] ? drm_property_add_enum+0xca/0x140 [drm]
[    8.994524]  [<ffffffffa00a9e96>] intel_sdvo_tv_init+0x1b6/0x1e0 [i915]
[    8.994643]  [<ffffffffa00aa78d>] intel_sdvo_init+0x4fd/0x7c0 [i915]
[    8.994759]  [<ffffffffa009d9fb>] intel_modeset_init+0xdcb/0xea0 [i915]
[    8.994868]  [<ffffffffa007528e>] i915_driver_load+0xa2e/0xb50 [i915]
[    8.994965]  [<ffffffffa001c111>] ? drm_get_minor+0x261/0x300 [drm]
[    8.995105]  [<ffffffffa001e8b6>] drm_get_pci_dev+0x186/0x2d0 [drm]
[    8.995189]  [<ffffffff810cdfad>] ? trace_hardirqs_on+0xd/0x10
[    8.995302]  [<ffffffffa00bede2>] i915_pci_probe+0x16/0x20 [i915]
[    8.995385]  [<ffffffff8135288c>] local_pci_probe+0x5c/0xd0
[    8.995464]  [<ffffffff81352a11>] pci_device_probe+0x111/0x120
[    8.995547]  [<ffffffff8141a582>] driver_probe_device+0x92/0x390
[    8.995628]  [<ffffffff8141a92b>] __driver_attach+0xab/0xb0
[    8.995708]  [<ffffffff8141a880>] ? driver_probe_device+0x390/0x390
[    8.995788]  [<ffffffff81418515>] bus_for_each_dev+0x55/0x90
[    8.995867]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    8.995945]  [<ffffffff81419e0e>] driver_attach+0x1e/0x20
[    8.996068]  [<ffffffff81419b18>] bus_add_driver+0x1b8/0x2b0
[    8.996151]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    8.996230]  [<ffffffff8141b027>] driver_register+0x77/0x150
[    8.996309]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    8.996388]  [<ffffffff8135160f>] __pci_register_driver+0x6f/0xf0
[    8.996468]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    8.996561]  [<ffffffffa001eb1a>] drm_pci_init+0x11a/0x130 [drm]
[    8.996642]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    8.996751]  [<ffffffffa00f208b>] i915_init+0x8b/0x8d [i915]
[    8.996833]  [<ffffffff8100212a>] do_one_initcall+0x12a/0x180
[    8.996915]  [<ffffffff810dbb26>] sys_init_module+0x1116/0x2210
[    8.996996]  [<ffffffff81345380>] ? ddebug_proc_open+0xd0/0xd0
[    8.997119]  [<ffffffff810c84cf>] ? lock_release_holdtime.part.26+0xf/0x180
[    8.997208]  [<ffffffff8169c729>] system_call_fastpath+0x16/0x1b
[    8.997284] ---[ end trace 533bf7565e4f928e ]---
[    9.002178] ------------[ cut here ]------------
[    9.002272] WARNING: at drivers/gpu/drm/drm_crtc.c:2886 drm_object_attach_property+0x4d/0x50 [drm]()
[    9.002385] Hardware name:         
[    9.002453] Failed to attach object property (type: 0xc0c0c0c0). Please increase DRM_OBJECT_MAX_PROPERTY by 1 for each time you see this message on the same object type.
[    9.002626] Modules linked in: i915(+) video i2c_algo_bit drm_kms_helper drm i2c_core
[    9.002738] Pid: 126, comm: udevd Tainted: G        W    3.4.0+ #3
[    9.002811] Call Trace:
[    9.002885]  [<ffffffff8106084f>] warn_slowpath_common+0x7f/0xc0
[    9.002965]  [<ffffffff81060946>] warn_slowpath_fmt+0x46/0x50
[    9.003105]  [<ffffffffa00221dd>] drm_object_attach_property+0x4d/0x50 [drm]
[    9.003205]  [<ffffffffa00221f5>] drm_connector_attach_property+0x15/0x20 [drm]
[    9.003358]  [<ffffffffa00a834e>] intel_sdvo_create_enhance_property+0x1fe/0xe20 [i915]
[    9.003491]  [<ffffffffa002329a>] ? drm_property_add_enum+0xca/0x140 [drm]
[    9.003611]  [<ffffffffa00a9e96>] intel_sdvo_tv_init+0x1b6/0x1e0 [i915]
[    9.003729]  [<ffffffffa00aa78d>] intel_sdvo_init+0x4fd/0x7c0 [i915]
[    9.003845]  [<ffffffffa009d9fb>] intel_modeset_init+0xdcb/0xea0 [i915]
[    9.003953]  [<ffffffffa007528e>] i915_driver_load+0xa2e/0xb50 [i915]
[    9.004094]  [<ffffffffa001c111>] ? drm_get_minor+0x261/0x300 [drm]
[    9.004194]  [<ffffffffa001e8b6>] drm_get_pci_dev+0x186/0x2d0 [drm]
[    9.004275]  [<ffffffff810cdfad>] ? trace_hardirqs_on+0xd/0x10
[    9.004388]  [<ffffffffa00bede2>] i915_pci_probe+0x16/0x20 [i915]
[    9.004469]  [<ffffffff8135288c>] local_pci_probe+0x5c/0xd0
[    9.004549]  [<ffffffff81352a11>] pci_device_probe+0x111/0x120
[    9.004630]  [<ffffffff8141a582>] driver_probe_device+0x92/0x390
[    9.004711]  [<ffffffff8141a92b>] __driver_attach+0xab/0xb0
[    9.004790]  [<ffffffff8141a880>] ? driver_probe_device+0x390/0x390
[    9.004870]  [<ffffffff81418515>] bus_for_each_dev+0x55/0x90
[    9.004949]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.005068]  [<ffffffff81419e0e>] driver_attach+0x1e/0x20
[    9.005148]  [<ffffffff81419b18>] bus_add_driver+0x1b8/0x2b0
[    9.005227]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.005307]  [<ffffffff8141b027>] driver_register+0x77/0x150
[    9.005387]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.005465]  [<ffffffff8135160f>] __pci_register_driver+0x6f/0xf0
[    9.005545]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.005638]  [<ffffffffa001eb1a>] drm_pci_init+0x11a/0x130 [drm]
[    9.005719]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.005828]  [<ffffffffa00f208b>] i915_init+0x8b/0x8d [i915]
[    9.005908]  [<ffffffff8100212a>] do_one_initcall+0x12a/0x180
[    9.005990]  [<ffffffff810dbb26>] sys_init_module+0x1116/0x2210
[    9.006115]  [<ffffffff81345380>] ? ddebug_proc_open+0xd0/0xd0
[    9.006199]  [<ffffffff810c84cf>] ? lock_release_holdtime.part.26+0xf/0x180
[    9.006286]  [<ffffffff8169c729>] system_call_fastpath+0x16/0x1b
[    9.006363] ---[ end trace 533bf7565e4f928f ]---
[    9.163969] ------------[ cut here ]------------
[    9.164116] WARNING: at drivers/gpu/drm/drm_crtc.c:2886 drm_object_attach_property+0x4d/0x50 [drm]()
[    9.164233] Hardware name:         
[    9.164300] Failed to attach object property (type: 0xc0c0c0c0). Please increase DRM_OBJECT_MAX_PROPERTY by 1 for each time you see this message on the same object type.
[    9.164476] Modules linked in: i915(+) video i2c_algo_bit drm_kms_helper drm i2c_core
[    9.164588] Pid: 126, comm: udevd Tainted: G        W    3.4.0+ #3
[    9.164662] Call Trace:
[    9.164738]  [<ffffffff8106084f>] warn_slowpath_common+0x7f/0xc0
[    9.164820]  [<ffffffff81060946>] warn_slowpath_fmt+0x46/0x50
[    9.164917]  [<ffffffffa00221dd>] drm_object_attach_property+0x4d/0x50 [drm]
[    9.165016]  [<ffffffffa00221f5>] drm_connector_attach_property+0x15/0x20 [drm]
[    9.165213]  [<ffffffffa00a8f34>] intel_sdvo_create_enhance_property+0xde4/0xe20 [i915]
[    9.165349]  [<ffffffffa002329a>] ? drm_property_add_enum+0xca/0x140 [drm]
[    9.165469]  [<ffffffffa00a9e96>] intel_sdvo_tv_init+0x1b6/0x1e0 [i915]
[    9.165587]  [<ffffffffa00aa7a4>] intel_sdvo_init+0x514/0x7c0 [i915]
[    9.165703]  [<ffffffffa009d9fb>] intel_modeset_init+0xdcb/0xea0 [i915]
[    9.165812]  [<ffffffffa007528e>] i915_driver_load+0xa2e/0xb50 [i915]
[    9.165909]  [<ffffffffa001c111>] ? drm_get_minor+0x261/0x300 [drm]
[    9.166006]  [<ffffffffa001e8b6>] drm_get_pci_dev+0x186/0x2d0 [drm]
[    9.166133]  [<ffffffff810cdfad>] ? trace_hardirqs_on+0xd/0x10
[    9.166249]  [<ffffffffa00bede2>] i915_pci_probe+0x16/0x20 [i915]
[    9.166331]  [<ffffffff8135288c>] local_pci_probe+0x5c/0xd0
[    9.166411]  [<ffffffff81352a11>] pci_device_probe+0x111/0x120
[    9.166494]  [<ffffffff8141a582>] driver_probe_device+0x92/0x390
[    9.166574]  [<ffffffff8141a92b>] __driver_attach+0xab/0xb0
[    9.166654]  [<ffffffff8141a880>] ? driver_probe_device+0x390/0x390
[    9.166734]  [<ffffffff81418515>] bus_for_each_dev+0x55/0x90
[    9.166814]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.166891]  [<ffffffff81419e0e>] driver_attach+0x1e/0x20
[    9.166969]  [<ffffffff81419b18>] bus_add_driver+0x1b8/0x2b0
[    9.167090]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.167170]  [<ffffffff8141b027>] driver_register+0x77/0x150
[    9.167250]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.167329]  [<ffffffff8135160f>] __pci_register_driver+0x6f/0xf0
[    9.167409]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.167502]  [<ffffffffa001eb1a>] drm_pci_init+0x11a/0x130 [drm]
[    9.167583]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.167691]  [<ffffffffa00f208b>] i915_init+0x8b/0x8d [i915]
[    9.167773]  [<ffffffff8100212a>] do_one_initcall+0x12a/0x180
[    9.167854]  [<ffffffff810dbb26>] sys_init_module+0x1116/0x2210
[    9.167936]  [<ffffffff81345380>] ? ddebug_proc_open+0xd0/0xd0
[    9.168062]  [<ffffffff810c84cf>] ? lock_release_holdtime.part.26+0xf/0x180
[    9.168152]  [<ffffffff8169c729>] system_call_fastpath+0x16/0x1b
[    9.168229] ---[ end trace 533bf7565e4f9290 ]---
[    9.173120] ------------[ cut here ]------------
[    9.173215] WARNING: at drivers/gpu/drm/drm_crtc.c:2886 drm_object_attach_property+0x4d/0x50 [drm]()
[    9.173328] Hardware name:         
[    9.173396] Failed to attach object property (type: 0xc0c0c0c0). Please increase DRM_OBJECT_MAX_PROPERTY by 1 for each time you see this message on the same object type.
[    9.173570] Modules linked in: i915(+) video i2c_algo_bit drm_kms_helper drm i2c_core
[    9.173681] Pid: 126, comm: udevd Tainted: G        W    3.4.0+ #3
[    9.173755] Call Trace:
[    9.173828]  [<ffffffff8106084f>] warn_slowpath_common+0x7f/0xc0
[    9.173909]  [<ffffffff81060946>] warn_slowpath_fmt+0x46/0x50
[    9.174006]  [<ffffffffa00221dd>] drm_object_attach_property+0x4d/0x50 [drm]
[    9.174152]  [<ffffffffa00221f5>] drm_connector_attach_property+0x15/0x20 [drm]
[    9.174305]  [<ffffffffa00a834e>] intel_sdvo_create_enhance_property+0x1fe/0xe20 [i915]
[    9.174438]  [<ffffffffa002329a>] ? drm_property_add_enum+0xca/0x140 [drm]
[    9.174558]  [<ffffffffa00a9e96>] intel_sdvo_tv_init+0x1b6/0x1e0 [i915]
[    9.174677]  [<ffffffffa00aa7a4>] intel_sdvo_init+0x514/0x7c0 [i915]
[    9.174793]  [<ffffffffa009d9fb>] intel_modeset_init+0xdcb/0xea0 [i915]
[    9.174902]  [<ffffffffa007528e>] i915_driver_load+0xa2e/0xb50 [i915]
[    9.174998]  [<ffffffffa001c111>] ? drm_get_minor+0x261/0x300 [drm]
[    9.175137]  [<ffffffffa001e8b6>] drm_get_pci_dev+0x186/0x2d0 [drm]
[    9.175219]  [<ffffffff810cdfad>] ? trace_hardirqs_on+0xd/0x10
[    9.175332]  [<ffffffffa00bede2>] i915_pci_probe+0x16/0x20 [i915]
[    9.175414]  [<ffffffff8135288c>] local_pci_probe+0x5c/0xd0
[    9.175494]  [<ffffffff81352a11>] pci_device_probe+0x111/0x120
[    9.175575]  [<ffffffff8141a582>] driver_probe_device+0x92/0x390
[    9.175655]  [<ffffffff8141a92b>] __driver_attach+0xab/0xb0
[    9.175735]  [<ffffffff8141a880>] ? driver_probe_device+0x390/0x390
[    9.175815]  [<ffffffff81418515>] bus_for_each_dev+0x55/0x90
[    9.175894]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.175972]  [<ffffffff81419e0e>] driver_attach+0x1e/0x20
[    9.176095]  [<ffffffff81419b18>] bus_add_driver+0x1b8/0x2b0
[    9.176178]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.176257]  [<ffffffff8141b027>] driver_register+0x77/0x150
[    9.176336]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.176414]  [<ffffffff8135160f>] __pci_register_driver+0x6f/0xf0
[    9.177143]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.177238]  [<ffffffffa001eb1a>] drm_pci_init+0x11a/0x130 [drm]
[    9.177319]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.177427]  [<ffffffffa00f208b>] i915_init+0x8b/0x8d [i915]
[    9.177508]  [<ffffffff8100212a>] do_one_initcall+0x12a/0x180
[    9.177590]  [<ffffffff810dbb26>] sys_init_module+0x1116/0x2210
[    9.177670]  [<ffffffff81345380>] ? ddebug_proc_open+0xd0/0xd0
[    9.177750]  [<ffffffff810c84cf>] ? lock_release_holdtime.part.26+0xf/0x180
[    9.177837]  [<ffffffff8169c729>] system_call_fastpath+0x16/0x1b
[    9.177913] ---[ end trace 533bf7565e4f9291 ]---
[    9.335587] ------------[ cut here ]------------
[    9.335694] WARNING: at drivers/gpu/drm/drm_crtc.c:2886 drm_object_attach_property+0x4d/0x50 [drm]()
[    9.335808] Hardware name:         
[    9.335876] Failed to attach object property (type: 0xc0c0c0c0). Please increase DRM_OBJECT_MAX_PROPERTY by 1 for each time you see this message on the same object type.
[    9.336096] Modules linked in: i915(+) video i2c_algo_bit drm_kms_helper drm i2c_core
[    9.336210] Pid: 126, comm: udevd Tainted: G        W    3.4.0+ #3
[    9.336284] Call Trace:
[    9.336361]  [<ffffffff8106084f>] warn_slowpath_common+0x7f/0xc0
[    9.336442]  [<ffffffff81060946>] warn_slowpath_fmt+0x46/0x50
[    9.336540]  [<ffffffffa00221dd>] drm_object_attach_property+0x4d/0x50 [drm]
[    9.336639]  [<ffffffffa00221f5>] drm_connector_attach_property+0x15/0x20 [drm]
[    9.336794]  [<ffffffffa00a8f34>] intel_sdvo_create_enhance_property+0xde4/0xe20 [i915]
[    9.336927]  [<ffffffffa002329a>] ? drm_property_add_enum+0xca/0x140 [drm]
[    9.337092]  [<ffffffffa00a9e96>] intel_sdvo_tv_init+0x1b6/0x1e0 [i915]
[    9.337212]  [<ffffffffa00aa7bb>] intel_sdvo_init+0x52b/0x7c0 [i915]
[    9.337328]  [<ffffffffa009d9fb>] intel_modeset_init+0xdcb/0xea0 [i915]
[    9.337437]  [<ffffffffa007528e>] i915_driver_load+0xa2e/0xb50 [i915]
[    9.337534]  [<ffffffffa001c111>] ? drm_get_minor+0x261/0x300 [drm]
[    9.337630]  [<ffffffffa001e8b6>] drm_get_pci_dev+0x186/0x2d0 [drm]
[    9.337713]  [<ffffffff810cdfad>] ? trace_hardirqs_on+0xd/0x10
[    9.337825]  [<ffffffffa00bede2>] i915_pci_probe+0x16/0x20 [i915]
[    9.337907]  [<ffffffff8135288c>] local_pci_probe+0x5c/0xd0
[    9.337987]  [<ffffffff81352a11>] pci_device_probe+0x111/0x120
[    9.338115]  [<ffffffff8141a582>] driver_probe_device+0x92/0x390
[    9.338199]  [<ffffffff8141a92b>] __driver_attach+0xab/0xb0
[    9.338278]  [<ffffffff8141a880>] ? driver_probe_device+0x390/0x390
[    9.338359]  [<ffffffff81418515>] bus_for_each_dev+0x55/0x90
[    9.338438]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.338516]  [<ffffffff81419e0e>] driver_attach+0x1e/0x20
[    9.338594]  [<ffffffff81419b18>] bus_add_driver+0x1b8/0x2b0
[    9.338673]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.338752]  [<ffffffff8141b027>] driver_register+0x77/0x150
[    9.338832]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.338910]  [<ffffffff8135160f>] __pci_register_driver+0x6f/0xf0
[    9.338991]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.339125]  [<ffffffffa001eb1a>] drm_pci_init+0x11a/0x130 [drm]
[    9.339207]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.339316]  [<ffffffffa00f208b>] i915_init+0x8b/0x8d [i915]
[    9.339397]  [<ffffffff8100212a>] do_one_initcall+0x12a/0x180
[    9.339479]  [<ffffffff810dbb26>] sys_init_module+0x1116/0x2210
[    9.339560]  [<ffffffff81345380>] ? ddebug_proc_open+0xd0/0xd0
[    9.339641]  [<ffffffff810c84cf>] ? lock_release_holdtime.part.26+0xf/0x180
[    9.339728]  [<ffffffff8169c729>] system_call_fastpath+0x16/0x1b
[    9.339805] ---[ end trace 533bf7565e4f9292 ]---
[    9.344699] ------------[ cut here ]------------
[    9.344794] WARNING: at drivers/gpu/drm/drm_crtc.c:2886 drm_object_attach_property+0x4d/0x50 [drm]()
[    9.344907] Hardware name:         
[    9.344974] Failed to attach object property (type: 0xc0c0c0c0). Please increase DRM_OBJECT_MAX_PROPERTY by 1 for each time you see this message on the same object type.
[    9.345189] Modules linked in: i915(+) video i2c_algo_bit drm_kms_helper drm i2c_core
[    9.345302] Pid: 126, comm: udevd Tainted: G        W    3.4.0+ #3
[    9.345375] Call Trace:
[    9.345449]  [<ffffffff8106084f>] warn_slowpath_common+0x7f/0xc0
[    9.345529]  [<ffffffff81060946>] warn_slowpath_fmt+0x46/0x50
[    9.345626]  [<ffffffffa00221dd>] drm_object_attach_property+0x4d/0x50 [drm]
[    9.345725]  [<ffffffffa00221f5>] drm_connector_attach_property+0x15/0x20 [drm]
[    9.345877]  [<ffffffffa00a834e>] intel_sdvo_create_enhance_property+0x1fe/0xe20 [i915]
[    9.346010]  [<ffffffffa002329a>] ? drm_property_add_enum+0xca/0x140 [drm]
[    9.346175]  [<ffffffffa00a9e96>] intel_sdvo_tv_init+0x1b6/0x1e0 [i915]
[    9.346295]  [<ffffffffa00aa7bb>] intel_sdvo_init+0x52b/0x7c0 [i915]
[    9.346411]  [<ffffffffa009d9fb>] intel_modeset_init+0xdcb/0xea0 [i915]
[    9.346519]  [<ffffffffa007528e>] i915_driver_load+0xa2e/0xb50 [i915]
[    9.346616]  [<ffffffffa001c111>] ? drm_get_minor+0x261/0x300 [drm]
[    9.346713]  [<ffffffffa001e8b6>] drm_get_pci_dev+0x186/0x2d0 [drm]
[    9.346794]  [<ffffffff810cdfad>] ? trace_hardirqs_on+0xd/0x10
[    9.346907]  [<ffffffffa00bede2>] i915_pci_probe+0x16/0x20 [i915]
[    9.346988]  [<ffffffff8135288c>] local_pci_probe+0x5c/0xd0
[    9.347109]  [<ffffffff81352a11>] pci_device_probe+0x111/0x120
[    9.347192]  [<ffffffff8141a582>] driver_probe_device+0x92/0x390
[    9.347273]  [<ffffffff8141a92b>] __driver_attach+0xab/0xb0
[    9.347353]  [<ffffffff8141a880>] ? driver_probe_device+0x390/0x390
[    9.347432]  [<ffffffff81418515>] bus_for_each_dev+0x55/0x90
[    9.347511]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.347588]  [<ffffffff81419e0e>] driver_attach+0x1e/0x20
[    9.347666]  [<ffffffff81419b18>] bus_add_driver+0x1b8/0x2b0
[    9.347745]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.347824]  [<ffffffff8141b027>] driver_register+0x77/0x150
[    9.347904]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.347982]  [<ffffffff8135160f>] __pci_register_driver+0x6f/0xf0
[    9.348106]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.348202]  [<ffffffffa001eb1a>] drm_pci_init+0x11a/0x130 [drm]
[    9.348284]  [<ffffffffa00f2000>] ? 0xffffffffa00f1fff
[    9.348392]  [<ffffffffa00f208b>] i915_init+0x8b/0x8d [i915]
[    9.348473]  [<ffffffff8100212a>] do_one_initcall+0x12a/0x180
[    9.348555]  [<ffffffff810dbb26>] sys_init_module+0x1116/0x2210
[    9.348635]  [<ffffffff81345380>] ? ddebug_proc_open+0xd0/0xd0
[    9.348716]  [<ffffffff810c84cf>] ? lock_release_holdtime.part.26+0xf/0x180
[    9.348802]  [<ffffffff8169c729>] system_call_fastpath+0x16/0x1b
[    9.348879] ---[ end trace 533bf7565e4f9293 ]---
[    9.399547] [drm] initialized overlay support
[    9.760818] fbcon: inteldrmfb (fb0) is primary device
[    9.834778] Console: switching to colour frame buffer device 160x64
[    9.851059] fb0: inteldrmfb frame buffer device
[    9.851158] drm: registered panic notifier
[    9.851398] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0

Just a quick question, is this a regression? If so, can you please attach the output of xrandr --verbose from a noisy and a quite kernel (otherwise just please attach it from this noisy kernel).

Thanks, Daniel

Daniel Vetter
[email protected] - +41 (0) 79 365 57 48 - http://blog.ffwll.ch

seems so, I don't see it on 3.3

this machine runs headless, so has no X installed right now, I'll get it in a while.

Dave

Attached.

Dave

The WARN is new, the problem is old.

commit c543188afb7a83e66161c026dc6fd5eb38dc0b63

Author: Paulo Zanoni <[email protected]>
Date:   Tue May 15 18:09:02 2012 -0300

drm: add generic ioctls to get/set properties on any object

Useless for connector properties (since they already have their own ioctls), but useful when we add properties to CRTCs, planes and other objects.

Before that commit we had no idea that we had run out of property slots. I think the WARN is genuine, but maybe we should just bump the count set it to WARN_ONCE and hope the conversion to lists arrives sooner rather than latter.
-Chris

Chris Wilson, Intel Open Source Technology Centre

2012/5/31 Chris Wilson <[email protected]>:

Chris is right: this is not a regression. Before that patch, no one checked if property creation really worked. I chose not to use WARN_ONCE because we need to increase the variable once for each time you see the message. Assuming this message appears on your log less than 8 times, does this patch fix your problem?

index 73e4560..bac55c2 100644
@@ -54,7 +54,7 @@ struct drm_mode_object {
        struct drm_object_properties *properties;
 };
 
-#define DRM_OBJECT_MAX_PROPERTY 16
+#define DRM_OBJECT_MAX_PROPERTY 24
 struct drm_object_properties {
        int count;
        uint32_t ids[DRM_OBJECT_MAX_PROPERTY];

Paulo Zanoni

2012/5/30 Dave Jones <[email protected]>:

Just a little more information: you have a lot of connector properties because for some reason the driver thinks you have TV1, TV2 and TV3. Each TV connector has a lot of properties... With kernel 3.3 you have only TV1 and TV2. Maybe instead of increasing the maximum property count we should try to investigate why there's a new TV connector in the new kernel (and maybe this is also not a bug/regression...).

Paulo Zanoni

I've merged a patch from Chris to detect additional sdvo TV outputs:

commit a0b1c7a5197293d6206b245b45edc3f508aadab6

Author: Chris Wilson <[email protected]>
Date:   Fri Sep 30 22:56:41 2011 +0100

drm/i915/sdvo: Include YRPB as an additional TV output type

So that explains that hopefully.
-Daniel

Daniel Vetter
Mail: [email protected]
Mobile: +41 (0)79 365 57 48