1. Please describe the problem: With an ASUS PRIME H570M-PLUS motherboard, nct6775 does not populate /sys/class/hwmon/. This appears to be the problem: $ journalctl -b --no-hostname | grep -A 2 nct6775 Sep 17 12:37:55 kernel: nct6775: Found NCT6798D or compatible chip at 0x2e:0x290 Sep 17 12:37:55 kernel: ACPI Warning: SystemIO range 0x0000000000000295-0x0000000000000296 conflicts with OpRegion 0x0000000000000290-0x0000000000000299 (\RMTW.SHWM) (20220331/utaddress-204) Sep 17 12:37:55 kernel: ACPI: OSL: Resource conflict; ACPI support missing from driver? A workaround is to append "acpi_enforce_resources=lax" to the kernel command-line. 2. What is the Version-Release number of the kernel: kernel-5.19.8-200.fc36.x86_64 lm_sensors-3.6.0-11.fc36.x86_64 3. Did it work previously in Fedora? Don't know. This is a new motherboard. 4. Can you reproduce this issue? If so, please provide the steps to reproduce the issue below: Always. Configure lm_sensors as below. 5. Does this problem occur with the latest Rawhide kernel? Didn't try. 6. Are you running any modules that not shipped with directly Fedora's kernel?: No. 7. Please attach the kernel logs. nct6775 is configured and loaded: $ grep nct6775 /etc/sysconfig/lm_sensors HWMON_MODULES="coretemp nct6775" $ lsmod | grep nct6775 nct6775 28672 0 nct6775_core 73728 1 nct6775 hwmon_vid 16384 1 nct6775 wmi 32768 3 nct6775,asus_wmi,wmi_bmof The DMI shows that the sensor chip is a Nuvoton NCT6798D: # dmidecode -t 34 # dmidecode 3.3 Getting SMBIOS data from sysfs. SMBIOS 3.3.0 present. Handle 0x0030, DMI type 34, 11 bytes Management Device Description: Nuvoton NCT6798D Type: LM78 Address: 0x00000000 Address Type: I/O Port The latest firmware is installed: $ inxi -M Machine: Type: Desktop System: ASUS product: N/A v: N/A serial: <superuser required> Mobo: ASUSTeK model: PRIME H570M-PLUS v: Rev 1.xx serial: <superuser required> UEFI: American Megatrends v: 1601 date: 05/07/2022 The ASUS PRIME-H570M-PLUS-CSM product page is here: https://www.asus.com/us/Motherboards-Components/Motherboards/CSM/PRIME-H570M-PLUS-CSM/
A web search for "RMTW.SHWM" found a report of an identical warning with a different ASUS motherboard: support for an "ROG STRIX B560-G GAMING WIFI" ? Date: Tue, 7 Dec 2021 23:02:59 +0100 https://www.spinics.net/lists/linux-hwmon/msg13673.html The warning from kernel 5.15.7-rc1 is at the end.
# dmidecode -t 2 # dmidecode 3.3 Getting SMBIOS data from sysfs. SMBIOS 3.3.0 present. Handle 0x0002, DMI type 2, 15 bytes Base Board Information Manufacturer: ASUSTeK COMPUTER INC. Product Name: PRIME H570M-PLUS Version: Rev 1.xx Serial Number: [removed] Asset Tag: Default string Features: Board is a hosting board Board is replaceable Location In Chassis: Default string Chassis Handle: 0x0003 Type: Motherboard Contained Object Handles: 0
Created attachment 1912683 [details] journalctl -k with kernel 5.19.9-200.fc36.x86_64
Created attachment 1912684 [details] lsmod with kernel 5.19.9-200.fc36.x86_64
Created attachment 1912691 [details] journalctl -k with kernel 6.0.0-0.rc5.20220914git3245cb65fd91.39.fc38.x86_64 The same problem occurs with kernel 6.0.0-0.rc5.20220914git3245cb65fd91.39.fc38.x86_64. This might be related: Sep 18 08:09:44 kernel: eeepc-wmi eeepc-wmi: Detected AsusMbSwInterface, not ASUSWMI, use DSTS
Created attachment 1913766 [details] DSDT for ASUS PRIME H570M-PLUS Generated with: # acpidump -n DSDT -b # iasl -d dsdt.dat
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Belatedly reporting this bug as fixed with kernel 6.4.13-100.fc37.x86_64. No warning follows this: $ journalctl -b --no-hostname | grep -i nct6775 Sep 13 05:22:07 kernel: nct6775: Found NCT6798D or compatible chip at 0x2e:0x290 And /sys/class/hwmon/ is populated: $ grep -E . /sys/class/hwmon/hwmon3/{name,fan*_input} /sys/class/hwmon/hwmon3/name:nct6798 /sys/class/hwmon/hwmon3/fan1_input:792 /sys/class/hwmon/hwmon3/fan2_input:1278 /sys/class/hwmon/hwmon3/fan3_input:0 /sys/class/hwmon/hwmon3/fan4_input:934 /sys/class/hwmon/hwmon3/fan5_input:0 /sys/class/hwmon/hwmon3/fan6_input:0 /sys/class/hwmon/hwmon3/fan7_input:0 This kernel commit adds support for the ASUS PRIME H570M-PLUS motherboard: hwmon: (nct6775) update ASUS WMI monitoring list A620/B760/W790 author Denis Pauk <pauk.denis> 2023-04-08 19:22:28 +0300 committer Guenter Roeck <linux> 2023-04-19 07:08:40 -0700 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/hwmon/nct6775-platform.c?h=linux-6.4.y&id=5dcd53e315b7cd3efb591227c281f979bebd2155