I have the same problem (minus the external displays). I am running Ubuntu 20.04, kernel version 5.4.0-58-generic. On resume from suspend, the kernel spews out the following messages:
kernel: [drm:atom_op_jump [radeon]] *ERROR* atombios stuck in loop for more than 5secs aborting kernel: [drm:atom_execute_table_locked [radeon]] *ERROR* atombios stuck executing CB56 (len 62, WS 0, PS 0) @ 0xCB72 kernel: [drm:atom_execute_table_locked [radeon]] *ERROR* atombios stuck executing B716 (len 236, WS 4, PS 0) @ 0xB7E3 kernel: [drm:atom_execute_table_locked [radeon]] *ERROR* atombios stuck executing B674 (len 74, WS 0, PS 8) @ 0xB67C kernel: [drm:si_dpm_enable [radeon]] *ERROR* si_init_smc_table failed kernel: [drm:radeon_pm_resume [radeon]] *ERROR* radeon: dpm resume failed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1838678 Title: radeon kernel driver fails to resume from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838678/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
