[drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO underrun

[drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO underrun

[Julian Wollrath]

Hi,

on my Thinkpad X230 with an i5-3320M CPU (Intel HD 4000 Graphics) I get

[   14.256386] [drm] Initialized drm 1.1.0 20060810
[   14.994752] [drm] Memory usable by graphics device = 2048M
[   15.033559] [drm] Supports vblank timestamp caching Rev 2
(21.10.2013).
[   15.033560] [drm] Driver supports precise vblank timestamp query.
[   15.120501] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to
bit banging on pin 5
[   15.503091] [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO
underrun
[   15.929629] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0
on minor 0
[   16.725847] [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off

The error occurs during startup and resuming from suspend to disk with
the v3.15.1 kernel. On v3.14.4 this error did not occur.

What information should I also provide, so set you can make sense out of
this error?


Cheers,
Julian

Re: [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO underrun

[Julian Wollrath]

Hi,

I just checked v3.16.0-rc1. There I get an additional error:
[   15.266373] [drm] Initialized drm 1.1.0 20060810
[   15.773818] [drm] Memory usable by graphics device = 2048M
[   15.779773] [drm] Supports vblank timestamp caching Rev 2
(21.10.2013).
[   15.033559] [drm] Driver supports precise vblank timestamp query.
[   15.866766] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to
bit banging on pin 5
[   16.160259] [drm:cpt_set_fifo_underrun_reporting] *ERROR* uncleared
pch fifo underrun on pch transcoder A
[   16.160260] [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO
underrun
[   16.674873] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0
on minor 0
[   17.722301] [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off

Cheers,
Julian

Am Tue, 17 Jun 2014 14:40:30 +0200
schrieb Julian Wollrath <jwollrath@web.de>:

> Hi,
> 
> on my Thinkpad X230 with an i5-3320M CPU (Intel HD 4000 Graphics) I
> get
> 
> [   14.256386] [drm] Initialized drm 1.1.0 20060810
> [   14.994752] [drm] Memory usable by graphics device = 2048M
> [   15.033559] [drm] Supports vblank timestamp caching Rev 2
> (21.10.2013).
> [   15.033560] [drm] Driver supports precise vblank timestamp query.
> [   15.120501] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to
> bit banging on pin 5
> [   15.503091] [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A
> FIFO underrun
> [   15.929629] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0
> on minor 0
> [   16.725847] [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off
> 
> The error occurs during startup and resuming from suspend to disk with
> the v3.15.1 kernel. On v3.14.4 this error did not occur.
> 
> What information should I also provide, so set you can make sense out
> of this error?
> 
> 
> Cheers,
> Julian

Re: [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO underrun

[Julian Wollrath]

Hi,

and here is the output for v3.15.1 with drm.debug=0xe maybe its a bit
more informative:
[   14.750618] [drm] Initialized drm 1.1.0 20060810
[   15.121271] [drm:i915_dump_device_info] i915 device info: gen=7, pciid=0x0166 flags=is_mobile,need_gfx_hws,is_ivybridge,has_fbc,has_hotplug,has_llc,
[   15.121536] [drm:intel_detect_pch] Found PantherPoint PCH
[   15.122075] [drm] Memory usable by graphics device = 2048M
[   15.122077] [drm:i915_gem_gtt_init] GMADR size = 256M
[   15.122079] [drm:i915_gem_gtt_init] GTT stolen size = 64M
[   15.122080] [drm:i915_gem_gtt_init] ppgtt mode: 1
[   15.152246] [drm:intel_opregion_setup] graphic opregion physical addr: 0xdaf55018
[   15.152255] [drm:intel_opregion_setup] Public ACPI methods supported
[   15.152257] [drm:intel_opregion_setup] SWSCI supported
[   15.157731] [drm:swsci_setup] SWSCI GBDA callbacks 00000483, SBCB callbacks 00000203
[   15.157734] [drm:intel_opregion_setup] ASLE supported
[   15.157780] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[   15.157781] [drm] Driver supports precise vblank timestamp query.
[   15.157783] [drm:init_vbt_defaults] Set default to SSC at 120000 kHz
[   15.157785] [drm:intel_parse_bios] Using VBT from OpRegion: $VBT SNB/IVB-MOBILE d
[   15.157787] [drm:parse_general_features] BDB_GENERAL_FEATURES int_tv_support 0 int_crt_support 1 lvds_use_ssc 1 lvds_ssc_freq 120000 display_clock_mode 0 fdi_rx_polarity_inverted 0
[   15.157788] [drm:parse_general_definitions] crt_ddc_bus_pin: 2
[   15.157791] [drm:parse_lfp_panel_data] Found panel mode in BIOS VBT tables:
[   15.157793] [drm:drm_mode_debug_printmodeline] Modeline 0:"1366x768" 0 75200 1366 1414 1478 1582 768 772 779 792 0x8 0xa
[   15.157795] [drm:parse_lfp_panel_data] VBT initial LVDS value 200300
[   15.157796] [drm:parse_lfp_backlight] VBT backlight PWM modulation frequency 220 Hz, active high, min brightness 3, level 255
[   15.157798] [drm:parse_sdvo_panel_data] Found SDVO panel mode in BIOS VBT tables:
[   15.157800] [drm:drm_mode_debug_printmodeline] Modeline 0:"1600x1200" 0 162000 1600 1664 1856 2160 1200 1201 1204 1250 0x8 0xa
[   15.157801] [drm:parse_sdvo_device_mapping] No SDVO device info is found in VBT
[   15.157802] [drm:parse_mipi] No MIPI BDB found
[   15.157809] [drm:intel_dsm_pci_probe] no _DSM method for intel device
[   15.157813] [drm:i915_gem_init_stolen] found 67108864 bytes of stolen memory at dba00000
[   15.157815] [drm:intel_display_power_get] enabling always-on
[   15.157848] [drm:intel_print_wm_latency] Primary WM0 latency 12 (1.2 usec)
[   15.157849] [drm:intel_print_wm_latency] Primary WM1 latency 4 (2.0 usec)
[   15.157850] [drm:intel_print_wm_latency] Primary WM2 latency 16 (8.0 usec)
[   15.157851] [drm:intel_print_wm_latency] Primary WM3 latency 32 (16.0 usec)
[   15.157853] [drm:intel_print_wm_latency] Sprite WM0 latency 12 (1.2 usec)
[   15.157854] [drm:intel_print_wm_latency] Sprite WM1 latency 4 (2.0 usec)
[   15.157855] [drm:intel_print_wm_latency] Sprite WM2 latency 16 (8.0 usec)
[   15.157856] [drm:intel_print_wm_latency] Sprite WM3 latency 32 (16.0 usec)
[   15.157857] [drm:intel_print_wm_latency] Cursor WM0 latency 12 (1.2 usec)
[   15.157858] [drm:intel_print_wm_latency] Cursor WM1 latency 4 (2.0 usec)
[   15.157859] [drm:intel_print_wm_latency] Cursor WM2 latency 16 (8.0 usec)
[   15.157860] [drm:intel_print_wm_latency] Cursor WM3 latency 64 (32.0 usec)
[   15.157862] [drm:intel_modeset_init] 3 display pipes available.
[   15.170881] [drm:intel_lvds_init] using preferred mode from EDID: 
[   15.170887] [drm:drm_mode_debug_printmodeline] Modeline 16:"1366x768" 60 75200 1366 1414 1478 1582 768 772 779 792 0x48 0x9
[   15.170895] [drm:intel_lvds_init] detected single-link lvds configuration
[   15.170982] [drm:intel_panel_setup_backlight] backlight initialized, enabled, brightness 4437/4437, sysfs interface registered
[   15.171015] [drm:intel_crt_reset] pch crt adpa set to 0xf40000
[   15.171020] [drm:intel_gmbus_force_bit] enabling bit-banging on i915 gmbus dpb. force bit now 1
[   15.178756] [drm:intel_sdvo_read_byte] i2c transfer returned -6
[   15.178758] [drm:intel_sdvo_init] No SDVO device found on SDVOB
[   15.178837] [drm:intel_gmbus_force_bit] disabling bit-banging on i915 gmbus dpb. force bit now 0
[   15.178879] [drm:intel_dp_init_connector] Adding DP connector on port B
[   15.178907] [drm:intel_dp_aux_init] registering DPDDC-B bus for card0-DP-1
[   15.178993] [drm:intel_dp_init_connector] Adding DP connector on port C
[   15.179018] [drm:intel_dp_aux_init] registering DPDDC-C bus for card0-DP-2
[   15.179052] [drm:intel_dp_init_connector] Adding DP connector on port D
[   15.179071] [drm:intel_dp_aux_init] registering DPDDC-D bus for card0-DP-3
[   15.179104] [drm:ironlake_init_pch_refclk] has_panel 1 has_lvds 1 has_ck505 0
[   15.179108] [drm:ironlake_init_pch_refclk] Using SSC on panel
[   15.179527] [drm:intel_modeset_readout_hw_state] [CRTC:5] hw state readout: enabled
[   15.179528] [drm:intel_modeset_readout_hw_state] [CRTC:8] hw state readout: disabled
[   15.179529] [drm:intel_modeset_readout_hw_state] [CRTC:11] hw state readout: disabled
[   15.179535] [drm:intel_modeset_readout_hw_state] PCH DPLL A hw state readout: refcount 1, on 1
[   15.179539] [drm:intel_modeset_readout_hw_state] PCH DPLL B hw state readout: refcount 0, on 0
[   15.179543] [drm:intel_modeset_readout_hw_state] [ENCODER:14:LVDS-14] hw state readout: enabled, pipe A
[   15.179546] [drm:intel_modeset_readout_hw_state] [ENCODER:20:DAC-20] hw state readout: disabled, pipe A
[   15.179548] [drm:intel_modeset_readout_hw_state] [ENCODER:21:TMDS-21] hw state readout: disabled, pipe A
[   15.179551] [drm:intel_modeset_readout_hw_state] [ENCODER:25:TMDS-25] hw state readout: disabled, pipe A
[   15.179554] [drm:intel_modeset_readout_hw_state] [ENCODER:27:TMDS-27] hw state readout: disabled, pipe A
[   15.179556] [drm:intel_modeset_readout_hw_state] [ENCODER:29:TMDS-29] hw state readout: disabled, pipe A
[   15.179559] [drm:intel_modeset_readout_hw_state] [ENCODER:31:TMDS-31] hw state readout: disabled, pipe A
[   15.179561] [drm:intel_modeset_readout_hw_state] [ENCODER:33:TMDS-33] hw state readout: disabled, pipe A
[   15.179564] [drm:intel_modeset_readout_hw_state] [CONNECTOR:13:LVDS-1] hw state readout: enabled
[   15.179567] [drm:intel_modeset_readout_hw_state] [CONNECTOR:19:VGA-1] hw state readout: disabled
[   15.179570] [drm:intel_modeset_readout_hw_state] [CONNECTOR:22:HDMI-A-1] hw state readout: disabled
[   15.179573] [drm:intel_modeset_readout_hw_state] [CONNECTOR:26:DP-1] hw state readout: disabled
[   15.179575] [drm:intel_modeset_readout_hw_state] [CONNECTOR:28:HDMI-A-2] hw state readout: disabled
[   15.179577] [drm:intel_modeset_readout_hw_state] [CONNECTOR:30:HDMI-A-3] hw state readout: disabled
[   15.179580] [drm:intel_modeset_readout_hw_state] [CONNECTOR:32:DP-2] hw state readout: disabled
[   15.179582] [drm:intel_modeset_readout_hw_state] [CONNECTOR:34:DP-3] hw state readout: disabled
[   15.179584] [drm:intel_dump_pipe_config] [CRTC:5][setup_hw_state] config for pipe A
[   15.179585] [drm:intel_dump_pipe_config] cpu_transcoder: A
[   15.179586] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 0
[   15.179587] [drm:intel_dump_pipe_config] fdi/pch: 1, lanes: 1, gmch_m: 5256861, gmch_n: 8388608, link_m: 146023, link_n: 524288, tu: 64
[   15.179589] [drm:intel_dump_pipe_config] dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
[   15.179590] [drm:intel_dump_pipe_config] requested mode:
[   15.179591] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 720 0 0 0 400 0 0 0 0x0 0x0
[   15.179592] [drm:intel_dump_pipe_config] adjusted mode:
[   15.179594] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x9
[   15.179595] [drm:intel_dump_crtc_timings] crtc timings: 75238 1366 1414 1478 1582 768 772 779 792, type: 0x0 flags: 0x9
[   15.179596] [drm:intel_dump_pipe_config] port clock: 75238
[   15.179597] [drm:intel_dump_pipe_config] pipe src size: 720x400
[   15.179598] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
[   15.179599] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x05560300, enabled
[   15.179600] [drm:intel_dump_pipe_config] ips: 0
[   15.179601] [drm:intel_dump_pipe_config] double wide: 0
[   15.179602] [drm:intel_dump_pipe_config] [CRTC:8][setup_hw_state] config for pipe B
[   15.179603] [drm:intel_dump_pipe_config] cpu_transcoder: B
[   15.179604] [drm:intel_dump_pipe_config] pipe bpp: 0, dithering: 0
[   15.179605] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
[   15.179606] [drm:intel_dump_pipe_config] dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
[   15.179607] [drm:intel_dump_pipe_config] requested mode:
[   15.179608] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
[   15.179609] [drm:intel_dump_pipe_config] adjusted mode:
[   15.179611] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
[   15.179612] [drm:intel_dump_crtc_timings] crtc timings: 0 0 0 0 0 0 0 0 0, type: 0x0 flags: 0x0
[   15.179613] [drm:intel_dump_pipe_config] port clock: 0
[   15.179614] [drm:intel_dump_pipe_config] pipe src size: 0x0
[   15.179615] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
[   15.179616] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
[   15.179616] [drm:intel_dump_pipe_config] ips: 0
[   15.179617] [drm:intel_dump_pipe_config] double wide: 0
[   15.179618] [drm:intel_dump_pipe_config] [CRTC:11][setup_hw_state] config for pipe C
[   15.179619] [drm:intel_dump_pipe_config] cpu_transcoder: C
[   15.179620] [drm:intel_dump_pipe_config] pipe bpp: 0, dithering: 0
[   15.179621] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
[   15.179622] [drm:intel_dump_pipe_config] dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
[   15.179623] [drm:intel_dump_pipe_config] requested mode:
[   15.179624] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
[   15.179625] [drm:intel_dump_pipe_config] adjusted mode:
[   15.179627] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
[   15.179628] [drm:intel_dump_crtc_timings] crtc timings: 0 0 0 0 0 0 0 0 0, type: 0x0 flags: 0x0
[   15.179629] [drm:intel_dump_pipe_config] port clock: 0
[   15.179630] [drm:intel_dump_pipe_config] pipe src size: 0x0
[   15.179630] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
[   15.179631] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
[   15.179632] [drm:intel_dump_pipe_config] ips: 0
[   15.179633] [drm:intel_dump_pipe_config] double wide: 0
[   15.179639] [drm:intel_connector_check_state] [CONNECTOR:13:LVDS-1]
[   15.179647] [drm:check_encoder_state] [ENCODER:14:LVDS-14]
[   15.179650] [drm:check_encoder_state] [ENCODER:20:DAC-20]
[   15.179652] [drm:check_encoder_state] [ENCODER:21:TMDS-21]
[   15.179655] [drm:check_encoder_state] [ENCODER:25:TMDS-25]
[   15.179657] [drm:check_encoder_state] [ENCODER:27:TMDS-27]
[   15.179660] [drm:check_encoder_state] [ENCODER:29:TMDS-29]
[   15.179662] [drm:check_encoder_state] [ENCODER:31:TMDS-31]
[   15.179665] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
[   15.179667] [drm:check_crtc_state] [CRTC:5]
[   15.179676] [drm:check_crtc_state] [CRTC:8]
[   15.179677] [drm:check_crtc_state] [CRTC:11]
[   15.179678] [drm:check_shared_dpll_state] PCH DPLL A
[   15.179682] [drm:check_shared_dpll_state] PCH DPLL B
[   15.179688] [drm:ironlake_get_plane_config] pipe/plane 0/0 with fb: size=720x400@32, offset=0, pitch 2560, size 0xfa000
[   15.179689] [drm:i915_gem_object_create_stolen_for_preallocated] creating preallocated stolen object: stolen_offset=0, gtt_offset=0, size=fa000
[   15.179692] [drm:i915_pages_create_for_stolen] offset=0x0, size=1024000
[   15.179695] [drm:intel_alloc_plane_obj] plane fb obj ffff8800ca3c6dc0
[   15.179697] [drm:i915_gem_setup_global_gtt] reserving preallocated space: 0 + fa000
[   15.179698] [drm:i915_gem_setup_global_gtt] clearing unused GTT space: [fa000, 7ffff000]
[   15.182033] [drm:gen6_ppgtt_init] Allocated pde space (2M) at GTT entry: 100
[   15.182037] [drm:i915_gem_context_init] HW context support initialized
[   15.182047] [drm:init_status_page] render ring hws offset: 0x00300000
[   15.183752] [drm:init_pipe_control] render ring pipe control offset: 0x00321000
[   15.183759] [drm:init_status_page] bsd ring hws offset: 0x00322000
[   15.183811] [drm:init_status_page] blitter ring hws offset: 0x00343000
[   15.183907] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:13:LVDS-1]
[   15.183909] [drm:intel_lvds_detect] [CONNECTOR:13:LVDS-1]
[   15.183916] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:13:LVDS-1] probed modes :
[   15.183919] [drm:drm_mode_debug_printmodeline] Modeline 16:"1366x768" 60 75200 1366 1414 1478 1582 768 772 779 792 0x48 0x9
[   15.183920] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:19:VGA-1]
[   15.183921] [drm:intel_crt_detect] [CONNECTOR:19:VGA-1] force=1
[   15.183927] [drm:intel_ironlake_crt_detect_hotplug] trigger hotplug detect cycle: adpa=0xf40000
[   15.193754] [drm:intel_ironlake_crt_detect_hotplug] ironlake hotplug adpa=0xf40000, result 0
[   15.193758] [drm:intel_crt_detect] CRT not detected via hotplug
[   15.193924] [drm:gmbus_xfer] GMBUS [i915 gmbus vga] NAK for addr: 0050 r(1)
[   15.193927] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus vga
[   15.193929] [drm:intel_crt_get_edid] CRT GMBUS EDID read failed, retry using GPIO bit-banging
[   15.193932] [drm:intel_gmbus_force_bit] enabling bit-banging on i915 gmbus vga. force bit now 1
[   15.194321] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus vga
[   15.194322] [drm:intel_gmbus_force_bit] disabling bit-banging on i915 gmbus vga. force bit now 0
[   15.194323] [drm:intel_crt_detect_ddc] CRT not detected via DDC:0x50 [no valid EDID found]
[   15.194325] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:19:VGA-1] disconnected
[   15.194326] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:22:HDMI-A-1]
[   15.194328] [drm:intel_hdmi_detect] [CONNECTOR:22:HDMI-A-1]
[   15.244812] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5
[   15.252806] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpb
[   15.252811] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:22:HDMI-A-1] disconnected
[   15.252815] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:26:DP-1]
[   15.252818] [drm:intel_dp_detect] [CONNECTOR:26:DP-1]
[   15.252822] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:26:DP-1] disconnected
[   15.252824] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:28:HDMI-A-2]
[   15.252826] [drm:intel_hdmi_detect] [CONNECTOR:28:HDMI-A-2]
[   15.253025] [drm:gmbus_xfer] GMBUS [i915 gmbus dpc] NAK for addr: 0050 r(1)
[   15.253027] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpc
[   15.253028] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:28:HDMI-A-2] disconnected
[   15.253039] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:30:HDMI-A-3]
[   15.253041] [drm:intel_hdmi_detect] [CONNECTOR:30:HDMI-A-3]
[   15.253207] [drm:gmbus_xfer] GMBUS [i915 gmbus dpd] NAK for addr: 0050 r(1)
[   15.253219] [drm:drm_do_probe_ddc_edid] drm: skipping non-existent adapter i915 gmbus dpd
[   15.253221] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:30:HDMI-A-3] disconnected
[   15.253223] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:32:DP-2]
[   15.253225] [drm:intel_dp_detect] [CONNECTOR:32:DP-2]
[   15.253231] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:32:DP-2] disconnected
[   15.253233] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:34:DP-3]
[   15.253235] [drm:intel_dp_detect] [CONNECTOR:34:DP-3]
[   15.253237] [drm:drm_helper_probe_single_connector_modes] [CONNECTOR:34:DP-3] disconnected
[   15.253239] [drm:drm_setup_crtcs] 
[   15.253241] [drm:drm_enable_connectors] connector 13 enabled? yes
[   15.253243] [drm:drm_enable_connectors] connector 19 enabled? no
[   15.253244] [drm:drm_enable_connectors] connector 22 enabled? no
[   15.253246] [drm:drm_enable_connectors] connector 26 enabled? no
[   15.253247] [drm:drm_enable_connectors] connector 28 enabled? no
[   15.253249] [drm:drm_enable_connectors] connector 30 enabled? no
[   15.253250] [drm:drm_enable_connectors] connector 32 enabled? no
[   15.253251] [drm:drm_enable_connectors] connector 34 enabled? no
[   15.253254] [drm:intel_fb_initial_config] looking for cmdline mode on connector 13
[   15.253256] [drm:intel_fb_initial_config] looking for preferred mode on connector 13
[   15.253259] [drm:intel_fb_initial_config] connector LVDS-1 on crtc 5: 1366x768
[   15.253260] [drm:intel_fb_initial_config] connector 19 not enabled, skipping
[   15.253262] [drm:intel_fb_initial_config] connector 22 not enabled, skipping
[   15.253263] [drm:intel_fb_initial_config] connector 26 not enabled, skipping
[   15.253264] [drm:intel_fb_initial_config] connector 28 not enabled, skipping
[   15.253266] [drm:intel_fb_initial_config] connector 30 not enabled, skipping
[   15.253267] [drm:intel_fb_initial_config] connector 32 not enabled, skipping
[   15.253268] [drm:intel_fb_initial_config] connector 34 not enabled, skipping
[   15.253271] [drm:drm_setup_crtcs] desired mode 1366x768 set on crtc 5
[   15.253275] [drm:intelfb_create] no BIOS fb, allocating a new one
[   15.253277] [drm:i915_gem_object_create_stolen] creating stolen object: size=408000
[   15.253283] [drm:i915_pages_create_for_stolen] offset=0xfa000, size=4227072
[   15.254433] [drm:intelfb_create] allocated 1366x768 fb: 0x00364000, bo ffff880118d0de00
[   15.255465] [drm:intel_crtc_cursor_set] cursor off
[   15.255468] [drm:intel_crtc_set_config] [CRTC:5] [FB:37] #connectors=1 (x y) (0 0)
[   15.255470] [drm:intel_set_config_compute_mode_changes] modes are different, full mode set
[   15.255471] [drm:drm_mode_debug_printmodeline] Modeline 0:"" 0 0 0 0 0 0 0 0 0 0 0x0 0x0
[   15.255473] [drm:drm_mode_debug_printmodeline] Modeline 36:"1366x768" 60 75200 1366 1414 1478 1582 768 772 779 792 0x48 0x9
[   15.255474] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:5], mode_changed=1, fb_changed=1
[   15.255475] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   15.255477] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
[   15.255479] [drm:connected_sink_compute_bpp] [CONNECTOR:13:LVDS-1] checking for sink bpp constrains
[   15.255482] [drm:intel_lvds_compute_config] forcing display bpp (was 24) to LVDS (18)
[   15.255483] [drm:ironlake_check_fdi_lanes] checking fdi config on pipe A, lanes 1
[   15.255484] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 18, dithering: 1
[   15.255485] [drm:intel_dump_pipe_config] [CRTC:5][modeset] config for pipe A
[   15.255486] [drm:intel_dump_pipe_config] cpu_transcoder: A
[   15.255486] [drm:intel_dump_pipe_config] pipe bpp: 18, dithering: 1
[   15.255487] [drm:intel_dump_pipe_config] fdi/pch: 1, lanes: 1, gmch_m: 2628430, gmch_n: 4194304, link_m: 146023, link_n: 524288, tu: 64
[   15.255488] [drm:intel_dump_pipe_config] dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
[   15.255488] [drm:intel_dump_pipe_config] requested mode:
[   15.255490] [drm:drm_mode_debug_printmodeline] Modeline 0:"1366x768" 60 75200 1366 1414 1478 1582 768 772 779 792 0x48 0x9
[   15.255490] [drm:intel_dump_pipe_config] adjusted mode:
[   15.255492] [drm:drm_mode_debug_printmodeline] Modeline 0:"1366x768" 60 75200 1366 1414 1478 1582 768 772 779 792 0x48 0x9
[   15.255493] [drm:intel_dump_crtc_timings] crtc timings: 75200 1366 1414 1478 1582 768 772 779 792, type: 0x48 flags: 0x9
[   15.255493] [drm:intel_dump_pipe_config] port clock: 75200
[   15.255494] [drm:intel_dump_pipe_config] pipe src size: 1366x768
[   15.255495] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
[   15.255495] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
[   15.255496] [drm:intel_dump_pipe_config] ips: 0
[   15.255496] [drm:intel_dump_pipe_config] double wide: 0
[   15.255498] [drm:intel_panel_actually_set_backlight] set backlight PWM = 0
[   15.504988] [drm:intel_disable_shared_dpll] disable PCH DPLL A (active 1, on? 1) for crtc 5
[   15.504992] [drm:intel_disable_shared_dpll] disabling PCH DPLL A
[   15.505421] [drm:intel_update_fbc] no output, disabling
[   15.505433] [drm:ivb_modeset_global_resources] disabling fdi C rx
[   15.505437] [drm:ironlake_get_refclk] using SSC reference clock of 120000 kHz
[   15.505454] [drm:intel_get_shared_dpll] CRTC:5 dropping existing PCH DPLL A
[   15.505455] [drm:intel_get_shared_dpll] CRTC:5 allocated PCH DPLL A
[   15.505456] [drm:intel_get_shared_dpll] using PCH DPLL A for pipe A
[   15.505457] [drm:intel_get_shared_dpll] setting up PCH DPLL A
[   15.505473] [drm:ironlake_update_primary_plane] Writing base 00364000 00000000 0 0 5504
[   15.505477] [drm:intel_crtc_mode_set] [ENCODER:14:LVDS-14] set [MODE:0:1366x768]
[   15.557991] [drm:g4x_wait_for_vblank] vblank wait timed out
[   15.610050] [drm:g4x_wait_for_vblank] vblank wait timed out
[   15.610226] [drm:ivb_manual_fdi_link_train] FDI_RX_IIR before link train 0x700
[   15.610237] [drm:ivb_manual_fdi_link_train] FDI_RX_IIR 0x700
[   15.610239] [drm:ivb_manual_fdi_link_train] FDI train 1 done, level 0.
[   15.610247] [drm:ivb_manual_fdi_link_train] FDI_RX_IIR 0x600
[   15.610249] [drm:ivb_manual_fdi_link_train] FDI train 2 done, level 0.
[   15.610249] [drm:ivb_manual_fdi_link_train] FDI train done.
[   15.610254] [drm:ironlake_enable_shared_dpll] enable PCH DPLL A (active 0, on? 0)for crtc 5
[   15.610255] [drm:ironlake_enable_shared_dpll] enabling PCH DPLL A
[   15.611640] [drm:intel_update_fbc] disabled per chip default
[   15.628333] [drm:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO underrun
[   16.052318] [drm:intel_panel_enable_backlight] pipe A
[   16.052323] [drm:intel_panel_actually_set_backlight] set backlight PWM = 4437
[   16.064331] [drm:intel_connector_check_state] [CONNECTOR:13:LVDS-1]
[   16.064356] [drm:check_encoder_state] [ENCODER:14:LVDS-14]
[   16.064359] [drm:check_encoder_state] [ENCODER:20:DAC-20]
[   16.064361] [drm:check_encoder_state] [ENCODER:21:TMDS-21]
[   16.064363] [drm:check_encoder_state] [ENCODER:25:TMDS-25]
[   16.064365] [drm:check_encoder_state] [ENCODER:27:TMDS-27]
[   16.064368] [drm:check_encoder_state] [ENCODER:29:TMDS-29]
[   16.064370] [drm:check_encoder_state] [ENCODER:31:TMDS-31]
[   16.064372] [drm:check_encoder_state] [ENCODER:33:TMDS-33]
[   16.064374] [drm:check_crtc_state] [CRTC:5]
[   16.064388] [drm:check_crtc_state] [CRTC:8]
[   16.064389] [drm:check_crtc_state] [CRTC:11]
[   16.064391] [drm:check_shared_dpll_state] PCH DPLL A
[   16.064394] [drm:check_shared_dpll_state] PCH DPLL B
[   16.064400] [drm:intel_crtc_cursor_set] cursor off
[   16.064401] [drm:intel_crtc_set_config] [CRTC:8] [NOFB]
[   16.064403] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
[   16.064405] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   16.064407] [drm:intel_crtc_cursor_set] cursor off
[   16.064408] [drm:intel_crtc_set_config] [CRTC:11] [NOFB]
[   16.064409] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:11], mode_changed=0, fb_changed=0
[   16.064411] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   16.064431] [drm:intel_crtc_set_config] [CRTC:5] [FB:37] #connectors=1 (x y) (0 0)
[   16.064434] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:5], mode_changed=0, fb_changed=0
[   16.064435] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   16.068233] [drm:intel_crtc_set_config] [CRTC:5] [FB:37] #connectors=1 (x y) (0 0)
[   16.068236] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:5], mode_changed=0, fb_changed=0
[   16.068238] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   16.083910] [drm:asle_set_backlight] bclp = 0x80000006
[   16.083915] [drm:asle_set_backlight] updating opregion backlight 6/255
[   16.083918] [drm:intel_panel_actually_set_backlight] set backlight PWM = 104
[   16.083921] [drm:asle_set_pwm_freq] PWM freq is not supported
[   16.084262] [drm:asle_set_backlight] bclp = 0x800000ff
[   16.084266] [drm:asle_set_backlight] updating opregion backlight 255/255
[   16.084268] [drm:intel_panel_actually_set_backlight] set backlight PWM = 4437
[   16.084271] [drm:asle_set_pwm_freq] PWM freq is not supported
[   16.084755] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[   16.719194] [drm] Enabling RC6 states: RC6 on, RC6p on, RC6pp off
[   16.722757] [drm:gen6_enable_rps] Overclocking supported. Max: 1200MHz, Overclock max: 1200MHz
[   17.165073] [drm:intel_crtc_set_config] [CRTC:5] [FB:37] #connectors=1 (x y) (0 0)
[   17.165079] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:5], mode_changed=0, fb_changed=0
[   17.165082] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   23.584104] [drm:i915_gem_open] 
[   23.584180] [drm:intel_crtc_cursor_set] cursor off
[   23.584187] [drm:intel_crtc_set_config] [CRTC:5] [FB:37] #connectors=1 (x y) (0 0)
[   23.584194] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:5], mode_changed=0, fb_changed=0
[   23.584199] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   23.584203] [drm:intel_crtc_cursor_set] cursor off
[   23.584205] [drm:intel_crtc_set_config] [CRTC:8] [NOFB]
[   23.584208] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
[   23.584211] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   23.584214] [drm:intel_crtc_cursor_set] cursor off
[   23.584216] [drm:intel_crtc_set_config] [CRTC:11] [NOFB]
[   23.584219] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:11], mode_changed=0, fb_changed=0
[   23.584222] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   24.352404] [drm:intel_crtc_set_config] [CRTC:5] [FB:37] #connectors=1 (x y) (0 0)
[   24.352408] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:5], mode_changed=0, fb_changed=0
[   24.352410] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   24.354903] [drm:i915_gem_open] 
[   24.354921] [drm:drm_mode_getresources] CRTC[3] CONNECTORS[8] ENCODERS[8]
[   24.407405] [drm:drm_mode_addfb] [FB:38]
[   24.407583] [drm:drm_mode_getresources] CRTC[3] CONNECTORS[8] ENCODERS[8]
[   24.407589] [drm:drm_mode_getresources] CRTC[3] CONNECTORS[8] ENCODERS[8]
[   24.407612] [drm:intel_crtc_cursor_set] cursor off
[   24.407620] [drm:intel_crtc_cursor_set] cursor off
[   24.407628] [drm:intel_crtc_cursor_set] cursor off
[   24.407631] [drm:drm_mode_getconnector] [CONNECTOR:13:?]
[   24.407694] [drm:drm_mode_getconnector] [CONNECTOR:13:?]
[   24.407967] [drm:drm_mode_getconnector] [CONNECTOR:19:?]
[   24.407975] [drm:drm_mode_getconnector] [CONNECTOR:19:?]
[   24.407996] [drm:drm_mode_getconnector] [CONNECTOR:22:?]
[   24.408002] [drm:drm_mode_getconnector] [CONNECTOR:22:?]
[   24.408016] [drm:drm_mode_getconnector] [CONNECTOR:26:?]
[   24.408021] [drm:drm_mode_getconnector] [CONNECTOR:26:?]
[   24.408035] [drm:drm_mode_getconnector] [CONNECTOR:28:?]
[   24.408040] [drm:drm_mode_getconnector] [CONNECTOR:28:?]
[   24.408053] [drm:drm_mode_getconnector] [CONNECTOR:30:?]
[   24.408060] [drm:drm_mode_getconnector] [CONNECTOR:30:?]
[   24.408074] [drm:drm_mode_getconnector] [CONNECTOR:32:?]
[   24.408089] [drm:drm_mode_getconnector] [CONNECTOR:32:?]
[   24.408250] [drm:drm_mode_getconnector] [CONNECTOR:34:?]
[   24.408256] [drm:drm_mode_getconnector] [CONNECTOR:34:?]
[   25.405626] [drm:drm_mode_addfb] [FB:38]
[   25.448785] [drm:drm_mode_setcrtc] [CRTC:5]
[   25.448798] [drm:drm_mode_setcrtc] [CONNECTOR:13:LVDS-1]
[   25.448801] [drm:intel_crtc_set_config] [CRTC:5] [FB:38] #connectors=1 (x y) (0 0)
[   25.448807] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:5], mode_changed=0, fb_changed=1
[   25.448810] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   25.449926] [drm:ironlake_update_primary_plane] Writing base 0076C000 00000000 0 0 5632
[   25.467563] [drm:drm_mode_setcrtc] [CRTC:8]
[   25.467569] [drm:intel_crtc_set_config] [CRTC:8] [NOFB]
[   25.467574] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:8], mode_changed=0, fb_changed=0
[   25.467577] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]
[   25.467583] [drm:drm_mode_setcrtc] [CRTC:11]
[   25.467584] [drm:intel_crtc_set_config] [CRTC:11] [NOFB]
[   25.467587] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:11], mode_changed=0, fb_changed=0
[   25.467589] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:LVDS-1] to [CRTC:5]



Cheers,
Julian