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charles17
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PostPosted: Mon Aug 28, 2017 7:00 am    Post subject: [SOLVED] ACPI Warning: If an ACPI driver is available ... Reply with quote

dmesg wrote:

[ 0.888556] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 0.888580] [drm] Driver supports precise vblank timestamp query.
[ 0.930563] nouveau 0000:01:00.0: DRM: MM: using COPY0 for buffer copies
[ 1.007111] nouveau 0000:01:00.0: No connectors reported connected with modes
[ 1.011705] [drm] Cannot find any crtc or sizes - going 1024x768
[ 1.067581] nouveau 0000:01:00.0: DRM: allocated 1024x768 fb: 0x60000, bo ffff88041c0ff800
[ 1.067713] nouveau 0000:01:00.0: fb1: nouveaufb frame buffer device
[ 1.067739] [drm] Initialized nouveau 1.3.1 20120801 for 0000:01:00.0 on minor 1
[ 1.070555] brd: module loaded
[ 1.071842] loop: module loaded
[ 1.076521] ACPI Warning: SystemIO range 0x0000000000000428-0x000000000000042F conflicts with OpRegion 0x0000000000000400-0x000000000000047F (\PMIO) (20160831/utaddress-247)
[ 1.076584] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 1.077485] ACPI Warning: SystemIO range 0x0000000000000540-0x000000000000054F conflicts with OpRegion 0x0000000000000500-0x0000000000000563 (\GPIO) (20160831/utaddress-247)
[ 1.078442] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 1.079426] ACPI Warning: SystemIO range 0x0000000000000530-0x000000000000053F conflicts with OpRegion 0x0000000000000500-0x0000000000000563 (\GPIO) (20160831/utaddress-247)
[ 1.080494] ACPI Warning: SystemIO range 0x0000000000000530-0x000000000000053F conflicts with OpRegion 0x0000000000000500-0x000000000000053F (\_SB.PCI0.PEG0.VID.GPSP) (20160831/utaddress-247)
[ 1.081572] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 1.082671] ACPI Warning: SystemIO range 0x0000000000000500-0x000000000000052F conflicts with OpRegion 0x0000000000000500-0x0000000000000563 (\GPIO) (20160831/utaddress-247)
[ 1.083843] ACPI Warning: SystemIO range 0x0000000000000500-0x000000000000052F conflicts with OpRegion 0x0000000000000500-0x000000000000053F (\_SB.PCI0.PEG0.VID.GPSP) (20160831/utaddress-247)
[ 1.085035] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
[ 1.086257] lpc_ich: Resource conflict(s) found affecting gpio_ich
[ 1.087518] ahci 0000:00:1f.2: version 3.0
[ 1.087639] ahci 0000:00:1f.2: SSS flag set, parallel bus scan disabled
[ 1.088893] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x33 impl SATA mode
[ 1.090122] ahci 0000:00:1f.2: flags: 64bit ncq stag pm led clo pio slum part ems sxs apst
[ 1.101578] scsi host0: ahci
[ 1.103056] scsi host1: ahci
[ 1.104536] scsi host2: ahci
[ 1.105883] scsi host3: ahci
[ 1.107256] scsi host4: ahci
[ 1.108588] scsi host5: ahci

What do these ACPI Warnings try to tell me?

Quote:
If an ACPI driver is available for this device

Which device does it mean?


Last edited by charles17 on Tue Sep 05, 2017 7:31 am; edited 1 time in total
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eccerr0r
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PostPosted: Mon Aug 28, 2017 8:40 am    Post subject: Reply with quote

I've only run across this when I try using a "native" lm_sensors driver. The problem being that ACPI already is using the device and thus there's a conflict (can't have two pieces of software directly accessing a device) and since there's no way to lock to mutex the two drivers, unfortunately, it means ACPI wins and a hope that there's an ACPI driver to get the data from that resource that was conflicting.

However it looks like a lot of people are seeing this new issue, including myself, with the new kernels (4.9.34+ ?). It looks like the conflicting driver is lpc_ich conflicting with ACPI.

At least for me I think I'm going to ignore the warning. It's been working for all this time well before they decided to put this warning in, so I'm not going to sweat it for now...
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charles17
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PostPosted: Mon Aug 28, 2017 9:27 am    Post subject: Reply with quote

Thanks eccerr0r,
If I had read more carefully, I should have seen that other line saying
Code:
[ 1.086257] lpc_ich: Resource conflict(s) found affecting gpio_ich

Does this altogether mean I should use Intel ICH GPIO ( CONFIG_GPIO_ICH ) in addition to Intel ICH LPC ( CONFIG_LPC_ICH ) or instead of it?
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PostPosted: Mon Aug 28, 2017 10:40 am    Post subject: Reply with quote

The question is, whether you actually use your GPIO pins on your hardware. If not, you just use LPC instead of GPIO.

I am asking, because GPIO pins are normally unused but on SoC devices (Like the Raspberry Pi). Some Laptop manufacturers use them for some additional functionality in certain devices, but those are handled by the device drivers.

If you want to read more about GPIO, the kernel docs on GPIO might be of some interest.
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charles17
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PostPosted: Mon Aug 28, 2017 11:02 am    Post subject: Reply with quote

Thanks Yamakuzure for the link. In fact on this laptop, GPIO is not set at all.
Those messages in dmesg (see OP) are really confusing for me.
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