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Date:      Mon, 24 Feb 2025 11:09:00 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 207677] atrtc Warning: Couldn't map I/O on Skylake Supermicro X11SSH-LN4F
Message-ID:  <bug-207677-227-d4E269FpeL@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-207677-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-207677-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D207677

Alexander Ziaee <ziaee@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Open
                 CC|                            |ziaee@FreeBSD.org

--- Comment #11 from Alexander Ziaee <ziaee@FreeBSD.org> ---
I'm also experiencing this on an Alder Lake laptop on 15-CURRENT, but haven=
't
noticed it causing any problems.

Seemingly relevant lines from dmesg:
```
[1.000083] efirtc0: <EFI Realtime Clock>
[1.000084] efirtc0: registered as a time-of-day clock, resolution 1.000000s
[1.000085] smbios0: <System Management BIOS> at iomem 0x48808000-0x4880801e
[1.000086] smbios0: Version: 3.4, BCD Revision: 3.4
[1.000087] aesni0: <AES-CBC,AES-CCM,AES-GCM,AES-ICM,AES-XTS,SHA1,SHA256>
[1.000088] acpi0: <DELL Dell Inc>
[1.005910] hpet0: <High Precision Event Timer> iomem 0xfed00000-0xfed003ff =
on
acpi0
[1.005911] Timecounter "HPET" frequency 19200000 Hz quality 950
[1.005920] Event timer "HPET" frequency 19200000 Hz quality 350
[1.005921] Event timer "HPET1" frequency 19200000 Hz quality 340
[1.005922] Event timer "HPET2" frequency 19200000 Hz quality 340
[1.005923] Event timer "HPET3" frequency 19200000 Hz quality 340
[1.005924] Event timer "HPET4" frequency 19200000 Hz quality 340
[1.005925] Event timer "HPET5" frequency 19200000 Hz quality 340
[1.005926] Event timer "HPET6" frequency 19200000 Hz quality 340
[1.005927] Event timer "HPET7" frequency 19200000 Hz quality 340
[1.005929] atrtc0: <AT realtime clock> port 0x70-0x77 irq 8 on acpi0
[1.005930] atrtc0: Warning: Couldn't map I/O.
[1.005931] atrtc0: registered as a time-of-day clock, resolution 1.000000s
[1.005932] Event timer "RTC" frequency 32768 Hz quality 0
[1.005933] attimer0: <AT timer> port 0x40-0x43,0x50-0x53 irq 0 on acpi0
[1.005934] Timecounter "i8254" frequency 1193182 Hz quality 0
[1.005935] Event timer "i8254" frequency 1193182 Hz quality 100
[1.005936] Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
[1.005937] acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1808-0x180b on
acpi0
[1.005940] acpi_ec0: <Embedded Controller: GPE 0x6e> port 0x930,0x934 on ac=
pi0
```
sysctl posted by another commenter:
```
# sysctl kern.eventtimer
kern.eventtimer.choice: LAPIC(600) HPET(350) HPET1(340) HPET2(340) HPET3(34=
0)
HPET4(340) HPET5(340) HPET6(340) HPET7(340) i8254(100) RTC(0)
kern.eventtimer.et.i8254.quality: 100
kern.eventtimer.et.i8254.frequency: 1193182
kern.eventtimer.et.i8254.flags: 1
kern.eventtimer.et.RTC.quality: 0
kern.eventtimer.et.RTC.frequency: 32768
kern.eventtimer.et.RTC.flags: 17
kern.eventtimer.et.HPET7.quality: 340
kern.eventtimer.et.HPET7.frequency: 19200000
kern.eventtimer.et.HPET7.flags: 3
kern.eventtimer.et.HPET6.quality: 340
kern.eventtimer.et.HPET6.frequency: 19200000
kern.eventtimer.et.HPET6.flags: 3
kern.eventtimer.et.HPET5.quality: 340
kern.eventtimer.et.HPET5.frequency: 19200000
kern.eventtimer.et.HPET5.flags: 3
kern.eventtimer.et.HPET4.quality: 340
kern.eventtimer.et.HPET4.frequency: 19200000
kern.eventtimer.et.HPET4.flags: 3
kern.eventtimer.et.HPET3.quality: 340
kern.eventtimer.et.HPET3.frequency: 19200000
kern.eventtimer.et.HPET3.flags: 3
kern.eventtimer.et.HPET2.quality: 340
kern.eventtimer.et.HPET2.frequency: 19200000
kern.eventtimer.et.HPET2.flags: 3
kern.eventtimer.et.HPET1.quality: 340
kern.eventtimer.et.HPET1.frequency: 19200000
kern.eventtimer.et.HPET1.flags: 3
kern.eventtimer.et.HPET.quality: 350
kern.eventtimer.et.HPET.frequency: 19200000
kern.eventtimer.et.HPET.flags: 3
kern.eventtimer.et.LAPIC.quality: 600
kern.eventtimer.et.LAPIC.frequency: 2918404264
kern.eventtimer.et.LAPIC.flags: 7
kern.eventtimer.periodic: 0
kern.eventtimer.timer: LAPIC
kern.eventtimer.idletick: 0
kern.eventtimer.singlemul: 2
```

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