Yesterday, I installed a clean installation of Ubuntu 24.04. At first, the sleep feature seemed to work properly. Then I installed some packages (both snap and deb packages). Today, I noticed that Ubuntu wakes up immediately when suspending. I had the same issue also on Ubuntu 22.04.
I have disabled all devices that can wake up the system using the method described here: Ubuntu wakes up after few seconds of sleep
So now the output of cat /proc/acpi/wakeup is:
Device S-state Status Sysfs node
PS2K S3 *disabled
PS2M S3 *disabled
IP2P S3 *disabled
RP01 S4 *disabled pci:0000:00:1c.0
RP02 S4 *disabled pci:0000:00:1c.1
RP03 S4 *disabled
RP04 S4 *disabled pci:0000:00:1c.3
RP06 S4 *disabled
RP07 S4 *disabled
RP08 S4 *disabled
BR1B S4 *disabled pci:0000:00:01.1
BR2A S4 *disabled pci:0000:00:02.0
BR2B S4 *disabled
BR2C S4 *disabled
BR2D S4 *disabled
BR3A S4 *disabled pci:0000:00:03.0
BR3B S4 *disabled pci:0000:00:03.1
BR3C S4 *disabled pci:0000:00:03.2
BR3D S4 *disabled pci:0000:00:03.3
RP05 S4 *disabled
LAN0 S4 *disabled pci:0000:00:19.0
BR1A S4 *disabled pci:0000:00:01.0
EHC1 S0 *disabled pci:0000:00:1d.0
EHC2 S0 *disabled pci:0000:00:1a.0
XHCI S0 *disabled pci:0000:00:14.0
QRP0 S4 *disabled
QR1A S4 *disabled
QR1B S4 *disabled
QR2A S4 *disabled
QR2B S4 *disabled
QR2C S4 *disabled
QR2D S4 *disabled
QR3A S4 *disabled
QR3B S4 *disabled
QR3C S4 *disabled
QR3D S4 *disabled
RRP0 S4 *disabled
RR1A S4 *disabled
RR1B S4 *disabled
RR2A S4 *disabled
RR2B S4 *disabled
RR2C S4 *disabled
RR2D S4 *disabled
RR3A S4 *disabled
RR3B S4 *disabled
RR3C S4 *disabled
RR3D S4 *disabled
SRP0 S4 *disabled
SR1A S4 *disabled
SR1B S4 *disabled
SR2A S4 *disabled
SR2B S4 *disabled
SR2C S4 *disabled
SR2D S4 *disabled
SR3A S4 *disabled
SR3B S4 *disabled
SR3C S4 *disabled
SR3D S4 *disabled
But the problem persists!
The issue may be related to NetworkManager, because just after a wake up, journalctl | grep -i "wake requested" gives
May 16 11:42:41 kant NetworkManager[1648]: <info> [1715847161.6790] manager: sleep: wake requested (sleeping: yes enabled: yes)
where the time matches with the time of the wake up.
Update 4 (FIX):
I replaced the keyboard with an old PS/2 keyboard I had and this fixed the problem. It's strange, because the previous keyboard worked properly otherwise.
Update 3:
I killed all processes appearing in the output of systemd-inhibit --list except GNOME Shell. One of them was NetworkManager. It didn't solve the problem. journalctl | grep -i "wake requested" doesn't show any new message.
Update 2:
Somebody suggested that I add the following lines to /etc/NetworkManager/NetworkManager.conf
[main]
sleep-wake=false
and then invoke sudo systemctl restart NetworkManager
It wasn't helpful either. And, again, journalctl | grep -i "wake requested" produces
May 16 13:34:05 kant NetworkManager[12491]: <info> [1715853845.6895] manager: sleep: wake requested (sleeping: yes enabled: yes)
with the time matching the time of wake up.
Update 1:
Based on some information I found on the web, I tried to disable the wake-on-lan feature of network interfaces with sudo ethtool -s INTERFACE_NAME wol d, but it hasn't been helpful.
