Hi Daniel/Paulo, It's easy to see such WARNING in dmesg, the DDI port is not disabled prior to disable transcoder. I am not sure it will impact the Pipe/transcoder/DDI-port configurations, anyway after some times WARNING, I could not make HDMI audio work anymore. With intel_audio_dump I could see the related configurations was totally disabled. DDI_BUF_CTL_A 0x00000080 DDI Buffer Controler A DDI_BUF_CTL_B 0x00000000 DDI Buffer Controler B DDI_BUF_CTL_C 0x00000080 DDI Buffer Controler C DDI_BUF_CTL_D 0x00000000 DDI Buffer Controler D DDI_BUF_CTL_E 0x80000002 DDI Buffer Controler E PIPE_CONF_A 0x00000000 PIPE Configuration A PIPE_CONF_B 0x00000000 PIPE Configuration B PIPE_CONF_C 0x00000000 PIPE Configuration C PIPE_CONF_EDP 0x00000000 PIPE Configuration EDP PIPE_DDI_FUNC_CTL_A 0xc4034002 PIPE DDI Function Control A PIPE_DDI_FUNC_CTL_B 0xa0035000 PIPE DDI Function Control B PIPE_DDI_FUNC_CTL_C 0x00030000 PIPE DDI Function Control C PIPE_DDI_FUNC_CTL_EDP 0x00030000 PIPE DDI Function Control EDP TRANS_CONF 0x00000000 Transcoder Configuration Thanks --xingchao [ 16.835658] ------------[ cut here ]------------ [ 16.835690] WARNING: at drivers/gpu/drm/i915/intel_display.c:1118 assert_fdi_tx+0x87/0x90 [i915]() [ 16.835691] Hardware name: Shark Bay Client platform [ 16.835692] FDI TX state assertion failure (expected off, current on) [ 16.835706] Modules linked in: snd_seq_midi_event i915(+) snd_seq snd_timer drm_kms_helper snd_seq _device ghash_clmulni_intel drm aesni_intel snd cryptd mcs7830 usbnet joydev aes_x86_64 soundcore psm ouse snd_page_alloc hid_generic i2c_algo_bit serio_raw video mac_hid microcode lpc_ich lp parport e10 00e usbhid hid [ 16.835708] Pid: 470, comm: modprobe Not tainted 3.5.0-rc46patches+ #12 [ 16.835709] Call Trace: [ 16.835715] [<ffffffff8105278f>] warn_slowpath_common+0x7f/0xc0 [ 16.835718] [<ffffffff81052886>] warn_slowpath_fmt+0x46/0x50 [ 16.835728] [<ffffffffa01cc847>] assert_fdi_tx+0x87/0x90 [i915] [ 16.835739] [<ffffffffa01d5cf5>] ironlake_crtc_disable+0x185/0x820 [i915] [ 16.835748] [<ffffffffa01d641e>] ironlake_crtc_dpms+0x8e/0xa0 [i915] [ 16.835756] [<ffffffffa01cdbd8>] intel_crtc_dpms+0x48/0x140 [i915] [ 16.835768] [<ffffffffa01d49d5>] intel_crtc_disable+0x35/0xb0 [i915] [ 16.835772] [<ffffffffa012d6a5>] drm_helper_disable_unused_functions+0x115/0x190 [drm_kms_helper] [ 16.835785] [<ffffffffa01d849d>] intel_modeset_init+0x8ad/0xf90 [i915] [ 16.835796] [<ffffffffa01aebba>] i915_driver_load+0xa8a/0xb90 [i915] [ 16.835812] [<ffffffffa016fa7b>] ? drm_get_minor+0x26b/0x310 [drm] [ 16.835819] [<ffffffffa0171e71>] drm_get_pci_dev+0x191/0x2b0 [drm] [ 16.835834] [<ffffffffa01fc01b>] i915_pci_probe+0x4f/0x57 [i915] [ 16.835837] [<ffffffff8134230c>] local_pci_probe+0x5c/0xd0 [ 16.835840] [<ffffffff81343c49>] pci_device_probe+0x109/0x130 [ 16.835843] [<ffffffff814065ee>] driver_probe_device+0x7e/0x220 [ 16.835845] [<ffffffff8140683b>] __driver_attach+0xab/0xb0 [ 16.835848] [<ffffffff81406790>] ? driver_probe_device+0x220/0x220 [ 16.835850] [<ffffffff81404a26>] bus_for_each_dev+0x56/0x90 [ 16.835852] [<ffffffff8140610e>] driver_attach+0x1e/0x20 [ 16.835854] [<ffffffff81405cc0>] bus_add_driver+0x1a0/0x270 [ 16.835856] [<ffffffff81406d96>] driver_register+0x76/0x130 [ 16.835859] [<ffffffff81343916>] __pci_register_driver+0x56/0xd0 [ 16.835862] [<ffffffff8166949d>] ? notifier_call_chain+0x4d/0x70 [ 16.835869] [<ffffffffa01720aa>] drm_pci_init+0x11a/0x130 [drm] [ 16.835871] [<ffffffffa0230000>] ? 0xffffffffa022ffff [ 16.835880] [<ffffffffa0230066>] i915_init+0x66/0x68 [i915] [ 16.835884] [<ffffffff8100203f>] do_one_initcall+0x3f/0x170 [ 16.835887] [<ffffffff810b581e>] sys_init_module+0xbe/0x230 [ 16.835890] [<ffffffff8166d769>] system_call_fastpath+0x16/0x1b [ 16.835891] ---[ end trace bd9532eaee4e4542 ]---
