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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - 4.14.15: [drm:drm_scdc_set_high_tmds_clock_ratio] *ERROR* Failed to read tmds config, err=-6"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105914#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - 4.14.15: [drm:drm_scdc_set_high_tmds_clock_ratio] *ERROR* Failed to read tmds config, err=-6"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105914">bug 105914</a>
from <span class="vcard"><a class="email" href="mailto:mmokrejs@gmail.com" title="mmokrejs@fold.natur.cuni.cz <mmokrejs@gmail.com>"> <span class="fn">mmokrejs@fold.natur.cuni.cz</span></a>
</span></b>
<pre>I left the LCD turned off overnight and left some package recompiles running.
# tail -f /var/log/messages | grep -B 50 -A 40 -i error
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_get_connector_state] Added
[CONNECTOR:68:HDMI-A-1] ffff88079560a180 state to ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_check_only] checking
ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_helper_check_modeset]
[CRTC:46:pipe B] active changed
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_helper_check_modeset]
Updating routing for [CONNECTOR:68:HDMI-A-1]
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_helper_check_modeset]
[CONNECTOR:68:HDMI-A-1] keeps [ENCODER:67:DDI B], now on [CRTC:46:pipe B]
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_helper_check_modeset]
[CRTC:46:pipe B] needs all connectors, enable: y, active: n
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_add_affected_connectors]
Adding all current connectors for [CRTC:46:pipe B] to ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_get_plane_state] Added
[PLANE:37:plane 1B] ffff880787531600 state to ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_add_affected_connectors]
Adding all current connectors for [CRTC:46:pipe B] to ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_check]
[CONNECTOR:68:HDMI-A-1] checking for sink bpp constrains
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_check] clamping display
bpp (was 36) to EDID reported max of 30
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_hdmi_compute_config] picking bpc
to 8 for HDMI output
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_hdmi_compute_config] forcing pipe
bpp to 24 for HDMI
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_check] hw max bpp: 36,
pipe bpp: 24, dithering: 0
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] [CRTC:46:pipe
B][modeset]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] cpu_transcoder:
B, pipe bpp: 24, dithering: 0
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] audio: 1,
infoframes: 1
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] requested mode:
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_mode_debug_printmodeline] Modeline
0:"" 0 241500 2560 2608 2640 2720 1440 1443 1448 1481 0x0 0x9
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] adjusted mode:
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_mode_debug_printmodeline] Modeline
0:"" 0 241500 2560 2608 2640 2720 1440 1443 1448 1481 0x0 0x9
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] crtc timings:
241500 2560 2608 2640 2720 1440 1443 1448 1481, type: 0x0 flags: 0x9
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] port clock:
241500, pipe src size: 2560x1440, pixel rate 241500
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] num_scalers: 2,
scaler_users: 0x0, scaler_id: -1
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] pch pfit: pos:
0x00000000, size: 0x00000000, disabled
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] ips: 0, double
wide: 0
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] dpll_hw_state:
ctrl1: 0x21, cfgcr1: 0x80800192, cfgcr2: 0x2a4
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] planes on this
crtc
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] [PLANE:37:plane
1B] FB:85, fb = 2560x1440 format = XR24 little-endian (0x34325258)
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] \x09scaler:-1
src 0x0+2560+1440 dst 0x0+2560+1440
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config] [PLANE:40:plane
2B] disabled, scaler_id = -1
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_dump_pipe_config]
[PLANE:43:cursor B] disabled, scaler_id = -1
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_check] New cdclk
calculated to be logical 337500 kHz, actual 337500 kHz
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_plane_atomic_calc_changes]
[CRTC:46:pipe B] has [PLANE:37:plane 1B] with fb 85
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_plane_atomic_calc_changes]
[PLANE:37:plane 1B] visible 1 -> 0, off 1, on 0, ms 1
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_find_shared_dpll] [CRTC:46:pipe
B] allocated DPLL 1
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_reference_shared_dpll] using DPLL
1 for pipe B
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_get_crtc_state] Added
[CRTC:36:pipe A] ffff880576b01000 state to ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_get_crtc_state] Added
[CRTC:56:pipe C] ffff88067467d800 state to ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:skl_compute_wm] [PLANE:37:plane 1B] ddb
(0 - 860) -> (0 - 0)
Apr 6 02:38:00 dell_e5580 kernel: [drm:skl_compute_wm] [PLANE:43:cursor B] ddb
(860 - 892) -> (0 - 0)
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_commit] committing
ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_state_default_clear]
Clearing atomic state ffff88063e088c00
Apr 6 02:38:00 dell_e5580 kernel: [drm:__drm_atomic_state_free] Freeing atomic
state ffff88063e088c00
Apr 6 02:38:00 dell_e5580 kernel: [drm:hsw_audio_codec_disable] Disable audio
codec on pipe B
Apr 6 02:38:00 dell_e5580 kernel: [drm:i915_audio_component_get_eld] Not valid
for port B
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_hdmi_handle_sink_scrambling]
Setting sink scrambling for enc:DDI B connector:HDMI-A-1
Apr 6 02:38:00 dell_e5580 kernel: [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK
for addr: 0054 w(1)
Apr 6 02:38:00 dell_e5580 kernel: [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK
on first message, retry
Apr 6 02:38:00 dell_e5580 kernel: [drm:gmbus_xfer] GMBUS [i915 gmbus dpb] NAK
for addr: 0054 w(1)
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_scdc_set_high_tmds_clock_ratio]
*ERROR* Failed to read tmds config, err=-6
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_encoders_disable.isra.94] *ERROR*
Set TMDS ratio failed
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_disable_pipe] disabling pipe B
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_power_well_disable] disabling DDI
B IO power well
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_disable_shared_dpll] disable DPLL
1 (active 2, on? 1) for crtc 46
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_disable_shared_dpll] disabling
DPLL 1
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:57:DDI A]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:67:DDI B]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:70:DDI C]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:72:DP-MST A]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:73:DP-MST B]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:74:DP-MST C]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:76:DDI D]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:78:DP-MST A]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:79:DP-MST B]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail]
[ENCODER:80:DP-MST C]
Apr 6 02:38:00 dell_e5580 kernel: [drm:verify_single_dpll_state.isra.108] DPLL
0
Apr 6 02:38:00 dell_e5580 kernel: [drm:verify_single_dpll_state.isra.108] DPLL
1
Apr 6 02:38:00 dell_e5580 kernel: [drm:verify_single_dpll_state.isra.108] DPLL
2
Apr 6 02:38:00 dell_e5580 kernel: [drm:verify_single_dpll_state.isra.108] DPLL
3
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_power_well_disable] disabling
power well 2
Apr 6 02:38:00 dell_e5580 kernel: [drm:verify_connector_state.isra.107]
[CONNECTOR:68:HDMI-A-1]
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_atomic_commit_tail] [CRTC:46:pipe
B]
Apr 6 02:38:00 dell_e5580 kernel: [drm:verify_single_dpll_state.isra.108] DPLL
1
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_power_well_disable] disabling DC
off
Apr 6 02:38:00 dell_e5580 kernel: [drm:skl_enable_dc6] Enabling DC6
Apr 6 02:38:00 dell_e5580 kernel: [drm:gen9_set_dc_state] Setting DC state
from 00 to 02
Apr 6 02:38:00 dell_e5580 kernel: [drm:intel_power_well_disable] disabling
always-on
Apr 6 02:38:00 dell_e5580 kernel: [drm:drm_atomic_state_default_clear]
Clearing atomic state ffff880562111800
Apr 6 02:38:00 dell_e5580 kernel: [drm:__drm_atomic_state_free] Freeing atomic
state ffff880562111800
I may lookup the mentioned patches but I would rather wait for their inclusion
in stable kernel.</pre>
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