SRU: https://lists.ubuntu.com/archives/kernel-
team/2021-December/126484.html (oem-5.13,oem-5.14,impish,jammy)
** Description changed:
+ [SRU Justification]
+
+ [Impact]
+
+ AMD Ryzen 7 platforms fail to s2idle when powered by bettery.
+
+ [Fix]
+
+ Upstream fix commit 49201b90af81 ("platform/x86: amd-pmc: Fix s2idle
+ failures on certain AMD laptops") from v5.16-rc5.
+
+ [Test Case]
+
+ Run checkbox suspend/resume tests on battey:
+
+ $ checkbox-cli run \
+
com.canonical.certification::stress-suspend-30-cycles-with-reboots-automated
+
+ [Where problems could occur]
+
+ This shortens AMD PMC communication poll delay to a half of the original
+ value. While we don't have much information about the exact value range
+ allowed, the side effect couldn't be evaluated practically. This change
+ was ACKed by AMD developers and has been marked cc stable, we'll
+ probably bump into it anyway.
+
+ [Other Info]
+
+ This may affect kernel >= 5.11. While Hirsute is near its EOL, it was
+ skipped here.
+
+ ========== original bug report ==========
+
kernel: amd_pmc AMDI0005:00: SMU response timed out
kernel: amd_pmc AMDI0005:00: suspend failed
kernel: PM: dpm_run_callback(): acpi_subsys_suspend_noirq+0x0/0x50 returns
-110
kernel: amd_pmc AMDI0005:00: PM: failed to suspend noirq: error -110
kernel: PM: noirq suspend of devices failed
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https://bugs.launchpad.net/bugs/1954633
Title:
s2idle suspend failure: amd_pmc AMDI0005:00: SMU response timed out
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