Hallo Igor,
thanks for taking the time. I tried to debug the issue my self but good stuck on booting an vanilla kernel (creating the uinitrd for it). Wondering if there is some documentation on how to boot the a64 without it (i dont see why we need one here).
Meanwhile i have some bootlog with from the armbian kernel (which you probably already have but which may help other to help here debugging)
[ *** ] A start job is running for Armbian …ware optimization (28s / 2min 14s)
[ 44.008360] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:41:crtc-0] flip_done timed out
[ 54.237793] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:43:eDP-1] flip_done timed out
[*** ] A start job is running for Armbian …ware optimization (29s / 2min 14s)
[ 74.744614] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:41:crtc-0] flip_done timed out
[ 84.957794] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:43:eDP-1] flip_done timed out
[ OK ] Finished Armbian hardware optimization.
[ 105.469267] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:41:crtc-0] flip_done timed out
[ 115.695951] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:43:eDP-1] flip_done timed out
[ 125.928118] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:35:plane-1] flip_done timed out
[ OK ] Reached target Basic System.
[ 136.174199] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:41:crtc-0] flip_done timed out
[ 146.438337] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:43:eDP-1] flip_done timed out
[ 156.637767] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:35:plane-1] flip_done timed out
Starting Accounts Service...
[ 166.899900] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:41:crtc-0] flip_done timed out
[ 177.148191] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:43:eDP-1] flip_done timed out
[ 187.357792] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:35:plane-1] flip_done timed out
Starting Save/Restore Sound Card State.
[ 197.597808] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:41:crtc-0] flip_done timed out
[ 207.837779] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:43:eDP-1] flip_done timed out
[ 218.102088] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:35:plane-1] flip_done timed out
[ OK ] Started Armbian first run tasks.
[ 228.356302] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:41:crtc-0] flip_done timed out
[ 238.557787] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:43:eDP-1] flip_done timed out
[ 248.797769] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [PLANE:35:plane-1] flip_done timed out
Starting Bluetooth service...
[ 259.089793] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CRTC:41:crtc-0] flip_done timed out
[ 269.315817] [drm:drm_atomic_helper_wait_for_dependencies] *ERROR* [CONNECTOR:43:eDP-1] flip_done timed out
[ 278.242162] Unable to handle kernel paging request at virtual address 0000000040030027
and later on the trace to it
[ 279.621805] ------------[ cut here ]------------
[ 279.621822] [CRTC:41:crtc-0] vblank wait timed out
[ 279.621904] WARNING: CPU: 1 PID: 193 at drivers/gpu/drm/drm_atomic_helper.c:1513 drm_atomic_helper_wait_for_vblanks.part.28+0x274/0x290
[ 279.621907] Modules linked in: hci_uart btqca btrtl btbcm 8723cs_old btintel bluetooth uvcvideo cfg80211 ecdh_generic axp20x_adc analogix_anx6345 axp20x_battery axp20x_ac_power videobuf2_vmalloc analogix_dp sunxi_cedrus(C) rfkill lima ecc sun4i_gpadc_iio gpu_sched industrialio l
[ 279.622012] CPU: 1 PID: 193 Comm: kworker/1:2 Tainted: G D WC 5.10.18-sunxi64 #trunk.1
[ 279.622014] Hardware name: Pinebook (DT)
[ 279.622030] Workqueue: events splash_callback_animation
[ 279.622039] pstate: 40000005 (nZcv daif -PAN -UAO -TCO BTYPE=--)
[ 279.622044] pc : drm_atomic_helper_wait_for_vblanks.part.28+0x274/0x290
[ 279.622050] lr : drm_atomic_helper_wait_for_vblanks.part.28+0x274/0x290
[ 279.622052] sp : ffff800012a03910
[ 279.622056] x29: ffff800012a03910 x28: 0000000000000000
[ 279.622062] x27: 000000000000042c x26: ffff000044646000
[ 279.622068] x25: 0000000000000000 x24: 0000000000000001
[ 279.622074] x23: 0000000000000038 x22: 0000000000000001
[ 279.622080] x21: ffff000042396700 x20: ffff0000421f8080
[ 279.622085] x19: 0000000000000000 x18: ffff8000114d17d0
[ 279.622091] x17: 0000000000000014 x16: 0000000000000002
[ 279.622097] x15: ffff8000114d1810 x14: 0000000000002548
[ 279.622102] x13: 0000000000002580 x12: ffff000075b71a20
[ 279.622107] x11: 0000000000000002 x10: ffff000075b66320
[ 279.622113] x9 : ffff000075b6dac0 x8 : 206b6e616c627620
[ 279.622119] x7 : 5d302d637472633a x6 : 0000000000000001
[ 279.622125] x5 : ffff000075b93810 x4 : 0000000000000000
[ 279.622130] x3 : 0000000000000027 x2 : 0000000000000023
[ 279.622136] x1 : 5280998379074000 x0 : 0000000000000000
[ 279.622143] Call trace:
[ 279.622150] drm_atomic_helper_wait_for_vblanks.part.28+0x274/0x290
[ 279.622156] drm_atomic_helper_commit_tail_rpm+0x64/0x80
[ 279.622160] commit_tail+0xa4/0x1a0
[ 279.622165] drm_atomic_helper_commit+0x160/0x408
[ 279.622172] drm_atomic_commit+0x4c/0x60
[ 279.622181] drm_client_modeset_commit_atomic.isra.17+0x1d8/0x270
[ 279.622187] drm_client_modeset_commit_locked+0x60/0x1a0
[ 279.622195] drm_fb_helper_pan_display+0xb8/0x1d8
[ 279.622202] fb_pan_display+0x8c/0x100
[ 279.622207] dummy_update_start+0x20/0x48
[ 279.622213] fbcon_switch+0x368/0x568
[ 279.622219] redraw_screen+0x144/0x270
[ 279.622225] splash_callback_redraw_vc.part.4+0x34/0x48
[ 279.622230] splash_callback_animation+0x4c/0x60
[ 279.622237] process_one_work+0x1f0/0x3c0
[ 279.622241] worker_thread+0x270/0x520
[ 279.622247] kthread+0x120/0x128
[ 279.622253] ret_from_fork+0x10/0x30
[ 279.622258] ---[ end trace d29e482d74631eef ]---
So while i`m not familiar with the the details of the display init i assume this is not the display but the gpu / drm driver crashing.
Any advice where to go from here to help with fixing the issue would be very appreciated.