few tests - dmesg-warn - Can't reduce link training parameters after failure
<7> [122.788141] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] [CONNECTOR:99:DP-1][ENCODER:98:DDI B/PHY B][DPRX] 8b/10b, lanes: 1, vswing levels: 2(max)/2(max)/2(max)/2(max), pre-emphasis levels: 0/0/0/0
<7> [122.789193] i915 0000:00:02.0: [drm:hsw_set_signal_levels [i915]] Using signal levels 07000000
<7> [122.851035] i915 0000:00:02.0: [drm:intel_dp_get_adjust_train [i915]] [CONNECTOR:99:DP-1][ENCODER:98:DDI B/PHY B][DPRX] 8b/10b, lanes: 1, vswing request: 3/3/3/3, pre-emphasis request: 0/0/0/0
<7> [122.852057] i915 0000:00:02.0: [drm:intel_dp_set_signal_levels [i915]] [CONNECTOR:99:DP-1][ENCODER:98:DDI B/PHY B][DPRX] 8b/10b, lanes: 1, vswing levels: 2(max)/2(max)/2(max)/2(max), pre-emphasis levels: 0/0/0/0
<7> [122.853069] i915 0000:00:02.0: [drm:hsw_set_signal_levels [i915]] Using signal levels 07000000
<7> [122.880716] i915 0000:00:02.0: [drm:intel_dp_dump_link_status [i915]] [CONNECTOR:99:DP-1][ENCODER:98:DDI B/PHY B][DPRX] ln0_1:0x1 ln2_3:0x0 align:0x80 sink:0x0 adj_req0_1:0x33 adj_req2_3:0x33
<7> [122.881542] i915 0000:00:02.0: [drm:intel_dp_link_train_phy [i915]] [CONNECTOR:99:DP-1][ENCODER:98:DDI B/PHY B][DPRX] Channel equalization failed 5 times
<7> [122.882401] i915 0000:00:02.0: [drm:intel_dp_link_train_phy [i915]] [CONNECTOR:99:DP-1][ENCODER:98:DDI B/PHY B][DPRX] Link Training failed at link rate = 162000, lane count = 1
<3> [122.884846] i915 0000:00:02.0: [drm] *ERROR* [CONNECTOR:99:DP-1][ENCODER:98:DDI B/PHY B][DPRX] Can't reduce link training parameters after failure
<7> [122.971325] i915 0000:00:02.0: [drm:lspcon_write_infoframe [i915]] AVI IF handled by FW
<7> [122.972215] i915 0000:00:02.0: [drm:intel_enable_transcoder [i915]] enabling pipe A
<7> [122.973746] i915 0000:00:02.0: [drm:intel_fbc_update [i915]] reserved 12288000 bytes of contiguous stolen space for FBC, limit: 1
<7> [122.974908] i915 0000:00:02.0: [drm:intel_fbc_update [i915]] Enabling FBC on [PLANE:32:plane 1A]
<7> [122.990766] i915 0000:00:02.0: [drm:intel_audio_codec_enable [i915]] [CONNECTOR:99:DP-1][ENCODER:98:DDI B/PHY B] Enable audio codec on [CRTC:53:pipe A], 36 bytes ELD
<7> [123.007772] i915 0000:00:02.0: [drm:verify_connector_state [i915]] [CONNECTOR:99:DP-1]
<7> [123.009414] i915 0000:00:02.0: [drm:intel_modeset_verify_crtc [i915]] [CRTC:53:pipe A]
<7> [123.018854] i915 0000:00:02.0: [drm:drm_client_dev_restore] intel-fbdev: ret=0
<6> [123.041612] Console: switching to colour frame buffer device 240x67