Thanks for the bug report. The final entry in your kernel log shows that
the Intel GPU tried and failed to update the screen:
[ 1216.206745] i915 0000:00:02.0: [drm] *ERROR* Atomic update failure on
pipe A (start=73567 end=73568) time 940 us, min 1073, max 1079, scanline
start 1033, end 1097
So maybe that's the issue...
Please try (separately):
1. Selecting 'Ubuntu on Wayland' on the login screen just before logging
in.
2. Edit /etc/environment and add a line:
MUTTER_DEBUG_ENABLE_ATOMIC_KMS=0
Then reboot and select 'Ubuntu on Wayland' again.
** Tags added: resume suspend-resume
** Package changed: xorg (Ubuntu) => linux-hwe-5.13 (Ubuntu)
** Changed in: linux-hwe-5.13 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1960602
Title:
Ubuntu 20.04 shows blank upon resuming from resume. Requires hard
shutdown using the h/w power button
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