Since kernel 18.104.22.168 update, I'm getting stuck at boot. No kenel after .55 can't boot. At recovery mode system halts at this message:
r8169 can't disable ASPM OS doesn't have ASPM control
I've found this is a long lasting bug. I've installed r8168-dkms (8.045.08-2ubuntu1) with synaptic package manager, but I've seen r8168 don't replace r8169, and boot halts at same point. I've found a forum post pointing to install r8168-dkms_8.047.02-1_all.deb, instead, but I'm not sure about this workaround.
dmesg | grep r816 [ 2.909400] r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded [ 2.909416] r8169 0000:03:00.2: can't disable ASPM; OS doesn't have ASPM control [ 2.910627] r8169 0000:03:00.2 eth0: RTL8402 at 0x (ptrval), 1c:b7:2c:0f:6a:c8, XID 04000800 IRQ 89 [ 3.050940] r8169 0000:03:00.2 enp3s0f2: renamed from eth0 [ 214.785516] r8169 0000:03:00.2 enp3s0f2: link down [ 5487.302121] r8169 0000:03:00.2 enp3s0f2: link down
Also I've found a solution at github "Linux driver for Realtek network chips with enabled ASPM", but not tried yet