The only explanations I can see for the failed boots is:
Feb 28 21:20:49 alvin-Legion-Pro-7-16IRX8H /usr/libexec/gdm-x-session[1356]: (WW) NVIDIA(G0): Failed to set the display configuration
Feb 28 21:20:49 alvin-Legion-Pro-7-16IRX8H /usr/libexec/gdm-x-session[1356]: (WW) NVIDIA(G0): - Setting a mode on head 0 failed: Insufficient permissions
Feb 28 21:20:49 alvin-Legion-Pro-7-16IRX8H /usr/libexec/gdm-x-session[1356]: (WW) NVIDIA(G0): - Setting a mode on head 1 failed: Insufficient permissions
Feb 28 21:20:49 alvin-Legion-Pro-7-16IRX8H /usr/libexec/gdm-x-session[1356]: (WW) NVIDIA(G0): - Setting a mode on head 2 failed: Insufficient permissions
Feb 28 21:20:49 alvin-Legion-Pro-7-16IRX8H /usr/libexec/gdm-x-session[1356]: (WW) NVIDIA(G0): - Setting a mode on head 3 failed: Insufficient permissions
Feb 28 21:20:49 alvin-Legion-Pro-7-16IRX8H /usr/libexec/gdm-x-session[1356]: (II) NVIDIA(GPU-0): Deleting GPU-0
Feb 28 21:20:49 alvin-Legion-Pro-7-16IRX8H /usr/libexec/gdm-x-session[1356]: (II) Server terminated successfully (0). Closing log file.
The slow boots still seem to be the backlight issue in comment #10.
The only explanations I can see for the failed boots is:
Feb 28 21:20:49 alvin-Legion- Pro-7-16IRX8H /usr/libexec/ gdm-x-session[ 1356]: (WW) NVIDIA(G0): Failed to set the display configuration Pro-7-16IRX8H /usr/libexec/ gdm-x-session[ 1356]: (WW) NVIDIA(G0): - Setting a mode on head 0 failed: Insufficient permissions Pro-7-16IRX8H /usr/libexec/ gdm-x-session[ 1356]: (WW) NVIDIA(G0): - Setting a mode on head 1 failed: Insufficient permissions Pro-7-16IRX8H /usr/libexec/ gdm-x-session[ 1356]: (WW) NVIDIA(G0): - Setting a mode on head 2 failed: Insufficient permissions Pro-7-16IRX8H /usr/libexec/ gdm-x-session[ 1356]: (WW) NVIDIA(G0): - Setting a mode on head 3 failed: Insufficient permissions Pro-7-16IRX8H /usr/libexec/ gdm-x-session[ 1356]: (II) NVIDIA(GPU-0): Deleting GPU-0 Pro-7-16IRX8H /usr/libexec/ gdm-x-session[ 1356]: (II) Server terminated successfully (0). Closing log file.
Feb 28 21:20:49 alvin-Legion-
Feb 28 21:20:49 alvin-Legion-
Feb 28 21:20:49 alvin-Legion-
Feb 28 21:20:49 alvin-Legion-
Feb 28 21:20:49 alvin-Legion-
Feb 28 21:20:49 alvin-Legion-
The slow boots still seem to be the backlight issue in comment #10.