Public bug reported:
I am running a new installation of Ubuntu noble 24.04 x86_64 (kernel
6.8.0-45-generic) on a brand new Thinkpad T14 Gen 5 (AMD Ryzen 7 PRO
8840U w/ Radeon 780M Graphics (16) @ 6.08 GHz)
The machine does not suspend properly, which I noticed after returning
from work with it in my backpack, taking it out and it was hot.
While suspended the screen is in fact off, and the relevant LEDs enter a
"breath" mode, indicating a suspended state, but there is an audible
mechanical "tick" sound coming from the bottom, where I suppose the fan
is located, and the laptop produces heat (gets hot if it's in a closed
environment like my backpack)
At first I thought it was a "lid closed" issue, but after further
experimentation turns out that it's not a lid issue, but rather a
suspension issue; suspending from the power button has the same result
I could not reproduce this behaviour on Windows (I am dual booting,
Windows Fastboot is off btw); suspending works properly; tested it, no
"tick" sound, no heat.
P.S. for what it's worth, my Thinkpad x13 Gen 1 on ubuntu 22, same
kernel version on AMD Ryzen Pro 7 4750U, has no issues with suspend.
Attaching system specs below. Please let me know what other info I need
to provide
Thanks.
** Affects: linux-hwe-6.8 (Ubuntu)
Importance: Undecided
Status: New
** Tags: noble suspend-resume
** Attachment added: "system specs as printed by fastfetch"
https://bugs.launchpad.net/bugs/2083454/+attachment/5823936/+files/specs.txt
** Package changed: linux-hwe-5.19 (Ubuntu) => linux-hwe-6.8 (Ubuntu)
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https://bugs.launchpad.net/bugs/2083454
Title:
Suspend issue with AMD Ryzen 8840U CPU and kernel 6.8.0-45-generic
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