У меня не загружается самоновейшее ядро 5.6.13-un-def на MBP 2011 с radeon

Лог загрузки 5.6.13, которое не работает, отличается от работающего 5.5.17-un-def
следующими строками:

kernel: drm_kms_helper: Unknown symbol cec_delete_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_transmit_attempt_done_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_conn_info (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr_from_edid (err -2)
kernel: drm_kms_helper: Unknown symbol cec_unregister_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_allocate_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_fill_conn_info_from_drm (err -2)
kernel: drm_kms_helper: Unknown symbol cec_received_msg_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_register_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_delete_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_transmit_attempt_done_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_conn_info (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr_from_edid (err -2)
kernel: drm_kms_helper: Unknown symbol cec_unregister_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_allocate_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_fill_conn_info_from_drm (err -2)
kernel: drm_kms_helper: Unknown symbol cec_received_msg_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_register_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_delete_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_transmit_attempt_done_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_conn_info (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr_from_edid (err -2)
kernel: drm_kms_helper: Unknown symbol cec_unregister_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_allocate_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_fill_conn_info_from_drm (err -2)
kernel: drm_kms_helper: Unknown symbol cec_received_msg_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_register_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_delete_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_transmit_attempt_done_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_conn_info (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr_from_edid (err -2)
kernel: drm_kms_helper: Unknown symbol cec_unregister_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_allocate_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_fill_conn_info_from_drm (err -2)
kernel: drm_kms_helper: Unknown symbol cec_received_msg_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_register_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_delete_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_transmit_attempt_done_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_conn_info (err -2)
kernel: drm_kms_helper: Unknown symbol cec_s_phys_addr_from_edid (err -2)
kernel: drm_kms_helper: Unknown symbol cec_unregister_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_allocate_adapter (err -2)
kernel: drm_kms_helper: Unknown symbol cec_fill_conn_info_from_drm (err -2)
kernel: drm_kms_helper: Unknown symbol cec_received_msg_ts (err -2)
kernel: drm_kms_helper: Unknown symbol cec_register_adapter (err -2)


В логе 5.5.17-un-def вместо них 


kernel: [drm] radeon kernel modesetting enabled.
kernel: fb0: switching to radeondrmfb from simple
kernel: [drm] initializing kernel modesetting (TURKS 0x1002:0x6741 0x106B:0x00E3 0x00).
kernel: [drm] Detected VRAM RAM=1024M, BAR=256M
kernel: [drm] RAM width 128bits DDR
kernel: [drm] radeon: 1024M of VRAM memory ready
kernel: [drm] radeon: 1024M of GTT memory ready.
kernel: [drm] Loading TURKS Microcode
kernel: [drm] External GPIO thermal controller with fan control
kernel: [drm] radeon: dpm initialized
kernel: [drm] GART: num cpu pages 262144, num gpu pages 262144
kernel: [drm] PCIE gen 2 link speeds already enabled
kernel: [drm] PCIE GART of 1024M enabled (table at 0x0000000000162000).
kernel: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
kernel: [drm] Driver supports precise vblank timestamp query.
kernel: [drm] radeon: irq initialized.
kernel: [drm] ring test on 0 succeeded in 2 usecs
kernel: [drm] ring test on 3 succeeded in 7 usecs
kernel: [drm] ring test on 5 succeeded in 2 usecs
kernel: [drm] UVD initialized successfully.
kernel: [drm] ib test on ring 0 succeeded in 0 usecs
kernel: [drm] ib test on ring 3 succeeded in 0 usecs
kernel: [drm] ib test on ring 5 succeeded
kernel: [drm] Radeon Display Connectors
kernel: [drm] Connector 0:
kernel: [drm]   LVDS-1
kernel: [drm]   DDC: 0x6470 0x6470 0x6474 0x6474 0x6478 0x6478 0x647c 0x647c
kernel: [drm]   Encoders:
kernel: [drm]     LCD1: INTERNAL_UNIPHY
kernel: [drm] Connector 1:
kernel: [drm]   DP-1
kernel: [drm]   HPD1
kernel: [drm]   DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
kernel: [drm]   Encoders:
kernel: [drm]     DFP1: INTERNAL_UNIPHY1
kernel: [drm] Connector 2:
kernel: [drm]   DP-2
kernel: [drm]   HPD2
kernel: [drm]   DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c
kernel: [drm]   Encoders:
kernel: [drm]     DFP2: INTERNAL_UNIPHY1
kernel: [drm] Connector 3:
kernel: [drm]   DP-3
kernel: [drm]   HPD3
kernel: [drm]   DDC: 0x6450 0x6450 0x6454 0x6454 0x6458 0x6458 0x645c 0x645c
kernel: [drm]   Encoders:
kernel: [drm]     DFP3: INTERNAL_UNIPHY2
kernel: [drm] fb mappable at 0x90363000
kernel: [drm] vram apper at 0x90000000
kernel: [drm] size 9216000
kernel: [drm] fb depth is 24
kernel: [drm]    pitch is 7680
kernel: fbcon: radeondrmfb (fb0) is primary device
kernel: radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
kernel: [drm] Initialized radeon 2.50.0 20080528 for 0000:01:00.0 on minor 0
kernel: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
kernel: [drm] Driver supports precise vblank timestamp query.
kernel: [drm] Initialized i915 1.6.0 20191101 for 0000:00:02.0 on minor 1
kernel: i915 0000:00:02.0: fb1: i915drmfb frame buffer device


[slava@mac2 ~]$ lspci
...
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M]
...