After some more debugging I found that the AIE bits are getting set which agrees with our attempt to set the alarm. We also see that the pnp probe is completing successfully as evident by this dmesg entry:
[ 1.715329] rtc_cmos 00:00: RTC can wake from S4 [ 1.721453] rtc_cmos 00:00: registered as rtc0 [ 1.727449] rtc_cmos 00:00: setting system clock to 2023-03-16T21:43:47 UTC (1679003027) [ 1.736086] rtc_cmos 00:00: alarms up to one day, y3k, 114 bytes nvram That would only show if cmos_do_probe completely normally. It appears that acpi_cmos_wake_setup (formerly rtc_wake_setup) is not called on the same code paths as it previously was. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oracle in Ubuntu. https://bugs.launchpad.net/bugs/2011854 Title: cmos_interrupt not getting called Status in linux-oracle package in Ubuntu: New Bug description: The ubuntu_ltp_kernel_misc rtc01 test case has exposed a possible regression of the RTC cmos driver on certain Oracle clouds. This was observed on jammy:linux-oracle-5.15.0-1031.37. - VM.DenseIO2.8 - VM.Standard2.1 rtc01 0 TINFO : RTC READ TEST: rtc01 1 TPASS : RTC READ TEST Passed rtc01 0 TINFO : Current RTC date/time is 16-3-2023, 17:36:04. rtc01 0 TINFO : RTC ALARM TEST : rtc01 0 TINFO : Alarm time set to 17:36:09. rtc01 0 TINFO : Waiting 5 seconds for the alarm... rtc01 2 TFAIL : rtc01.c:151: Timed out waiting for the alarm rtc01 0 TINFO : RTC UPDATE INTERRUPTS TEST : rtc01 0 TINFO : Waiting for 5 update interrupts... rtc01 3 TFAIL : rtc01.c:208: Timed out waiting for the update interrupt rtc01 0 TINFO : RTC Tests Done! Notice that we successfully enable RTC_AIE_ON, unlike VM.Standard.A1.Flex-4c.8m which does not support it. I confirmed with bpftrace on -1029 that we see the cmos interrupt (part of ltp read_alarm_test) sudo bpftrace -e 'kprobe:cmos_interrupt { printf("%s\n", probe) }' Attaching 1 probe... kprobe:cmos_interrupt On -1031 no interrupt is detected. I think this might be caused by 017314318ad4 ("rtc: cmos: Call cmos_wake_setup() from cmos_do_probe()") To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-oracle/+bug/2011854/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
