Fix very long boot time after migrated to Debian Buster 64bit
After migrating from Emmabuntüs 32bit to Emmabuntüs 64bit, boot time was very long and the following messages were shown:
[drm:drm_atomic_helper_wait_for_flip_done [drm_kms_helper]] *ERROR* [CRTC:41:pipe B] flip_done timed out
[drm:drm_atomic_helper_wait_for_dependencies [drm_kms_helper]] *ERROR* [PLANE:35:plane B] flip_done timed out
The problem can be fixed by modifying
grub configuration. Open /etc/default/grub, then change the GRUB_CMDLINE_LINUX_DEFAULT line:
GRUB_CMDLINE_LINUX_DEFAULT="video=SVIDEO-1:d quiet splash"
On next reboot, you should see the difference.