Comment 0 for bug 1890467

I run the kernel 5.4.0-42-generic on a fully up-to-date Ubuntu "focal" on Dell Latitude E6440.
While scrolling through the output of `journalctl -b` I came across a warning (marked yellow):

[ 0.659825] wmi_bus wmi_bus-PNP0C14:00: WQBC data block query control method not found

Now, since this is a warning, I get, ergo, warned. What is it that I get warned about? Is it just a printf or is some action required?

Here is the context of this warning in dmesg:

# dmesg | grep -B 10 -A 5 "method not found"
[ 0.518379] rtc_cmos 00:02: setting system clock to 2020-08-05T15:23:54 UTC (1596641034)
[ 0.519455] Freeing unused decrypted memory: 2040K
[ 0.520119] Freeing unused kernel image memory: 2712K
[ 0.531430] Write protecting the kernel read-only data: 22528k
[ 0.532242] Freeing unused kernel image memory: 2008K
[ 0.532805] Freeing unused kernel image memory: 1192K
[ 0.540186] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 0.540514] x86/mm: Checking user space page tables
[ 0.547468] x86/mm: Checked W+X mappings: passed, no W+X pages found.
[ 0.547786] Run /init as init process
[ 0.659825] wmi_bus wmi_bus-PNP0C14:00: WQBC data block query control method not found
[ 0.659921] ACPI Warning: SystemIO range 0x0000000000001828-0x000000000000182F conflicts with OpRegion 0x0000000000001800-0x000000000000183F (\_SB.PCI0.EHC2.E1PM) (20190816/utaddress-204)
[ 0.661768] ACPI Warning: SystemIO range 0x0000000000001828-0x000000000000182F conflicts with OpRegion 0x0000000000001800-0x000000000000183F (\_SB.PCI0.EHC1.E1PM) (20190816/utaddress-204)
[ 0.663121] ACPI Warning: SystemIO range 0x0000000000001828-0x000000000000182F conflicts with OpRegion 0x0000000000001800-0x000000000000187F (\PMIO) (20190816/utaddress-204)
[ 0.664516] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 0.666167] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k

Some more info:

# ls -la /sys/devices/platform/PNP0C14:00
drwxr-xr-x 4 root root 0 Aug 5 17:23 .
drwxr-xr-x 29 root root 0 Aug 5 17:23 ..
lrwxrwxrwx 1 root root 0 Aug 5 17:23 driver -> ../../../bus/platform/drivers/acpi-wmi
-rw-r--r-- 1 root root 4096 Aug 5 18:09 driver_override
lrwxrwxrwx 1 root root 0 Aug 5 18:09 firmware_node -> ../../LNXSYSTM:00/LNXSYBUS:00/PNP0C14:00
-r--r--r-- 1 root root 4096 Aug 5 18:09 modalias
drwxr-xr-x 2 root root 0 Aug 5 18:09 power
lrwxrwxrwx 1 root root 0 Aug 5 17:23 subsystem -> ../../../bus/platform
-rw-r--r-- 1 root root 4096 Aug 5 17:23 uevent
drwxr-xr-x 3 root root 0 Aug 5 17:23 wmi_bus
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