I upgraded to KDE plasma and had to replace KDM with SDDM, I noticed that if the lock screen stays for a long time it is not possible to enter your password. E.g. the system lids the screen, there is mouse cursor moving but one can't click on anything like selecting user not input the password to uncock.
I'm using 0.13.0-r3 on AMD64, After the upgrade I see the following errors:
83082.842460] [drm:atom_op_jump [radeon]] *ERROR* atombios stuck in loop for more than 5secs aborting
[83082.842514] [drm:atom_execute_table_locked [radeon]] *ERROR* atombios stuck executing 74A4 (len 237, WS 0, PS 4) @ 0x74B2
[83082.842561] [drm:atom_execute_table_locked [radeon]] *ERROR* atombios stuck executing 6E38 (len 78, WS 12, PS 8) @ 0x6E71
[83082.857817] [drm] probing gen 2 caps for device 1022:1439 = 733c41/6
[83082.857825] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
[83084.233637] radeon 0000:01:00.0: Wait for MC idle timedout !
[83084.646979] radeon 0000:01:00.0: Wait for MC idle timedout !
[83084.660763] [drm] PCIE GART of 2048M enabled (table at 0x0000000000040000).
[83084.660913] radeon 0000:01:00.0: WB enabled
[83084.660921] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff8800a7a9ec00
[83084.660926] radeon 0000:01:00.0: fence driver on ring 1 use gpu addr 0x0000000040000c04 and cpu addr 0xffff8800a7a9ec04
[83084.660931] radeon 0000:01:00.0: fence driver on ring 2 use gpu addr 0x0000000040000c08 and cpu addr 0xffff8800a7a9ec08
[83084.660936] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff8800a7a9ec0c
[83084.660941] radeon 0000:01:00.0: fence driver on ring 4 use gpu addr 0x0000000040000c10 and cpu addr 0xffff8800a7a9ec10
[83084.660947] radeon 0000:01:00.0: VCE init error (-22).
[83085.905890] [drm:r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed (scratch(0x850C)=0xCAFEDEAD)
[83085.905960] [drm:si_resume [radeon]] *ERROR* si startup failed on resume
sddm is not maintained by gentoo kde project. Please do not assign bugs by yourself. Thanks.