This working really well on Fedora. Patched. All we need now is Ubuntu 22.04 OEM C and we’re on the right path.
Any luck on an Ubuntu patch or instructions on how to set the kernel flag on a 22.04 system? I’m seeing the same behavior with a sleep-then-shutdown script using rtcwake.
edit: just used the basic instructions from ubuntu here – Kernel/KernelBootParameters - Ubuntu Wiki and can confirm that on my 22.04 system running 6.2.0 AMD Framework 13 the rtc_cmos.use_acpi_alarm=1 kernel parmeter does seem to fix the interrupted suspend issue!
Also, for the benefit of anyone who finds this thread in the future, it seems this is a quick/easy way to test if the parameter is set correctly, it should return “Y”
$ cat /sys/module/rtc_cmos/parameters/use_acpi_alarm
Y
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Just as an update, the kernel parameter is not needed anymore after the linux kernel 6.8, which includes a fix for this.
Ubuntu 24.04 comes with this kernel